Merge tag 'v3.10-rc2' into asoc-ux500

Linux 3.10-rc2

Documentation/devicetree/usage-model.txt

···
 	};
 
 The bootargs property contains the kernel arguments, and the initrd-*
-properties define the address and size of an initrd blob.  The
-chosen node may also optionally contain an arbitrary number of
-additional properties for platform-specific configuration data.
+properties define the address and size of an initrd blob.  Note that
+initrd-end is the first address after the initrd image, so this doesn't
+match the usual semantic of struct resource.  The chosen node may also
+optionally contain an arbitrary number of additional properties for
+platform-specific configuration data.
 
 During early boot, the architecture setup code calls of_scan_flat_dt()
 several times with different helper callbacks to parse device tree

Documentation/kernel-parameters.txt

···
 			Force threading of all interrupt handlers except those
 			marked explicitly IRQF_NO_THREAD.
 
+	tmem		[KNL,XEN]
+			Enable the Transcendent memory driver if built-in.
+
+	tmem.cleancache=0|1 [KNL, XEN]
+			Default is on (1). Disable the usage of the cleancache
+			API to send anonymous pages to the hypervisor.
+
+	tmem.frontswap=0|1 [KNL, XEN]
+			Default is on (1). Disable the usage of the frontswap
+			API to send swap pages to the hypervisor. If disabled
+			the selfballooning and selfshrinking are force disabled.
+
+	tmem.selfballooning=0|1 [KNL, XEN]
+			Default is on (1). Disable the driving of swap pages
+			to the hypervisor.
+
+	tmem.selfshrinking=0|1 [KNL, XEN]
+			Default is on (1). Partial swapoff that immediately
+			transfers pages from Xen hypervisor back to the
+			kernel based on different criteria.
+
 	topology=	[S390]
 			Format: {off | on}
 			Specify if the kernel should make use of the cpu

Documentation/kernel-per-CPU-kthreads.txt

···
+REDUCING OS JITTER DUE TO PER-CPU KTHREADS
+
+This document lists per-CPU kthreads in the Linux kernel and presents
+options to control their OS jitter.  Note that non-per-CPU kthreads are
+not listed here.  To reduce OS jitter from non-per-CPU kthreads, bind
+them to a "housekeeping" CPU dedicated to such work.
+
+
+REFERENCES
+
+o	Documentation/IRQ-affinity.txt:  Binding interrupts to sets of CPUs.
+
+o	Documentation/cgroups:  Using cgroups to bind tasks to sets of CPUs.
+
+o	man taskset:  Using the taskset command to bind tasks to sets
+	of CPUs.
+
+o	man sched_setaffinity:  Using the sched_setaffinity() system
+	call to bind tasks to sets of CPUs.
+
+o	/sys/devices/system/cpu/cpuN/online:  Control CPU N's hotplug state,
+	writing "0" to offline and "1" to online.
+
+o	In order to locate kernel-generated OS jitter on CPU N:
+
+		cd /sys/kernel/debug/tracing
+		echo 1 > max_graph_depth # Increase the "1" for more detail
+		echo function_graph > current_tracer
+		# run workload
+		cat per_cpu/cpuN/trace
+
+
+KTHREADS
+
+Name: ehca_comp/%u
+Purpose: Periodically process Infiniband-related work.
+To reduce its OS jitter, do any of the following:
+1.	Don't use eHCA Infiniband hardware, instead choosing hardware
+	that does not require per-CPU kthreads.  This will prevent these
+	kthreads from being created in the first place.  (This will
+	work for most people, as this hardware, though important, is
+	relatively old and is produced in relatively low unit volumes.)
+2.	Do all eHCA-Infiniband-related work on other CPUs, including
+	interrupts.
+3.	Rework the eHCA driver so that its per-CPU kthreads are
+	provisioned only on selected CPUs.
+
+
+Name: irq/%d-%s
+Purpose: Handle threaded interrupts.
+To reduce its OS jitter, do the following:
+1.	Use irq affinity to force the irq threads to execute on
+	some other CPU.
+
+Name: kcmtpd_ctr_%d
+Purpose: Handle Bluetooth work.
+To reduce its OS jitter, do one of the following:
+1.	Don't use Bluetooth, in which case these kthreads won't be
+	created in the first place.
+2.	Use irq affinity to force Bluetooth-related interrupts to
+	occur on some other CPU and furthermore initiate all
+	Bluetooth activity on some other CPU.
+
+Name: ksoftirqd/%u
+Purpose: Execute softirq handlers when threaded or when under heavy load.
+To reduce its OS jitter, each softirq vector must be handled
+separately as follows:
+TIMER_SOFTIRQ:  Do all of the following:
+1.	To the extent possible, keep the CPU out of the kernel when it
+	is non-idle, for example, by avoiding system calls and by forcing
+	both kernel threads and interrupts to execute elsewhere.
+2.	Build with CONFIG_HOTPLUG_CPU=y.  After boot completes, force
+	the CPU offline, then bring it back online.  This forces
+	recurring timers to migrate elsewhere.	If you are concerned
+	with multiple CPUs, force them all offline before bringing the
+	first one back online.  Once you have onlined the CPUs in question,
+	do not offline any other CPUs, because doing so could force the
+	timer back onto one of the CPUs in question.
+NET_TX_SOFTIRQ and NET_RX_SOFTIRQ:  Do all of the following:
+1.	Force networking interrupts onto other CPUs.
+2.	Initiate any network I/O on other CPUs.
+3.	Once your application has started, prevent CPU-hotplug operations
+	from being initiated from tasks that might run on the CPU to
+	be de-jittered.  (It is OK to force this CPU offline and then
+	bring it back online before you start your application.)
+BLOCK_SOFTIRQ:  Do all of the following:
+1.	Force block-device interrupts onto some other CPU.
+2.	Initiate any block I/O on other CPUs.
+3.	Once your application has started, prevent CPU-hotplug operations
+	from being initiated from tasks that might run on the CPU to
+	be de-jittered.  (It is OK to force this CPU offline and then
+	bring it back online before you start your application.)
+BLOCK_IOPOLL_SOFTIRQ:  Do all of the following:
+1.	Force block-device interrupts onto some other CPU.
+2.	Initiate any block I/O and block-I/O polling on other CPUs.
+3.	Once your application has started, prevent CPU-hotplug operations
+	from being initiated from tasks that might run on the CPU to
+	be de-jittered.  (It is OK to force this CPU offline and then
+	bring it back online before you start your application.)
+TASKLET_SOFTIRQ: Do one or more of the following:
+1.	Avoid use of drivers that use tasklets.  (Such drivers will contain
+	calls to things like tasklet_schedule().)
+2.	Convert all drivers that you must use from tasklets to workqueues.
+3.	Force interrupts for drivers using tasklets onto other CPUs,
+	and also do I/O involving these drivers on other CPUs.
+SCHED_SOFTIRQ: Do all of the following:
+1.	Avoid sending scheduler IPIs to the CPU to be de-jittered,
+	for example, ensure that at most one runnable kthread is present
+	on that CPU.  If a thread that expects to run on the de-jittered
+	CPU awakens, the scheduler will send an IPI that can result in
+	a subsequent SCHED_SOFTIRQ.
+2.	Build with CONFIG_RCU_NOCB_CPU=y, CONFIG_RCU_NOCB_CPU_ALL=y,
+	CONFIG_NO_HZ_FULL=y, and, in addition, ensure that the CPU
+	to be de-jittered is marked as an adaptive-ticks CPU using the
+	"nohz_full=" boot parameter.  This reduces the number of
+	scheduler-clock interrupts that the de-jittered CPU receives,
+	minimizing its chances of being selected to do the load balancing
+	work that runs in SCHED_SOFTIRQ context.
+3.	To the extent possible, keep the CPU out of the kernel when it
+	is non-idle, for example, by avoiding system calls and by
+	forcing both kernel threads and interrupts to execute elsewhere.
+	This further reduces the number of scheduler-clock interrupts
+	received by the de-jittered CPU.
+HRTIMER_SOFTIRQ:  Do all of the following:
+1.	To the extent possible, keep the CPU out of the kernel when it
+	is non-idle.  For example, avoid system calls and force both
+	kernel threads and interrupts to execute elsewhere.
+2.	Build with CONFIG_HOTPLUG_CPU=y.  Once boot completes, force the
+	CPU offline, then bring it back online.  This forces recurring
+	timers to migrate elsewhere.  If you are concerned with multiple
+	CPUs, force them all offline before bringing the first one
+	back online.  Once you have onlined the CPUs in question, do not
+	offline any other CPUs, because doing so could force the timer
+	back onto one of the CPUs in question.
+RCU_SOFTIRQ:  Do at least one of the following:
+1.	Offload callbacks and keep the CPU in either dyntick-idle or
+	adaptive-ticks state by doing all of the following:
+	a.	Build with CONFIG_RCU_NOCB_CPU=y, CONFIG_RCU_NOCB_CPU_ALL=y,
+		CONFIG_NO_HZ_FULL=y, and, in addition ensure that the CPU
+		to be de-jittered is marked as an adaptive-ticks CPU using
+		the "nohz_full=" boot parameter.  Bind the rcuo kthreads
+		to housekeeping CPUs, which can tolerate OS jitter.
+	b.	To the extent possible, keep the CPU out of the kernel
+		when it is non-idle, for example, by avoiding system
+		calls and by forcing both kernel threads and interrupts
+		to execute elsewhere.
+2.	Enable RCU to do its processing remotely via dyntick-idle by
+	doing all of the following:
+	a.	Build with CONFIG_NO_HZ=y and CONFIG_RCU_FAST_NO_HZ=y.
+	b.	Ensure that the CPU goes idle frequently, allowing other
+		CPUs to detect that it has passed through an RCU quiescent
+		state.	If the kernel is built with CONFIG_NO_HZ_FULL=y,
+		userspace execution also allows other CPUs to detect that
+		the CPU in question has passed through a quiescent state.
+	c.	To the extent possible, keep the CPU out of the kernel
+		when it is non-idle, for example, by avoiding system
+		calls and by forcing both kernel threads and interrupts
+		to execute elsewhere.
+
+Name: rcuc/%u
+Purpose: Execute RCU callbacks in CONFIG_RCU_BOOST=y kernels.
+To reduce its OS jitter, do at least one of the following:
+1.	Build the kernel with CONFIG_PREEMPT=n.  This prevents these
+	kthreads from being created in the first place, and also obviates
+	the need for RCU priority boosting.  This approach is feasible
+	for workloads that do not require high degrees of responsiveness.
+2.	Build the kernel with CONFIG_RCU_BOOST=n.  This prevents these
+	kthreads from being created in the first place.  This approach
+	is feasible only if your workload never requires RCU priority
+	boosting, for example, if you ensure frequent idle time on all
+	CPUs that might execute within the kernel.
+3.	Build with CONFIG_RCU_NOCB_CPU=y and CONFIG_RCU_NOCB_CPU_ALL=y,
+	which offloads all RCU callbacks to kthreads that can be moved
+	off of CPUs susceptible to OS jitter.  This approach prevents the
+	rcuc/%u kthreads from having any work to do, so that they are
+	never awakened.
+4.	Ensure that the CPU never enters the kernel, and, in particular,
+	avoid initiating any CPU hotplug operations on this CPU.  This is
+	another way of preventing any callbacks from being queued on the
+	CPU, again preventing the rcuc/%u kthreads from having any work
+	to do.
+
+Name: rcuob/%d, rcuop/%d, and rcuos/%d
+Purpose: Offload RCU callbacks from the corresponding CPU.
+To reduce its OS jitter, do at least one of the following:
+1.	Use affinity, cgroups, or other mechanism to force these kthreads
+	to execute on some other CPU.
+2.	Build with CONFIG_RCU_NOCB_CPUS=n, which will prevent these
+	kthreads from being created in the first place.  However, please
+	note that this will not eliminate OS jitter, but will instead
+	shift it to RCU_SOFTIRQ.
+
+Name: watchdog/%u
+Purpose: Detect software lockups on each CPU.
+To reduce its OS jitter, do at least one of the following:
+1.	Build with CONFIG_LOCKUP_DETECTOR=n, which will prevent these
+	kthreads from being created in the first place.
+2.	Echo a zero to /proc/sys/kernel/watchdog to disable the
+	watchdog timer.
+3.	Echo a large number of /proc/sys/kernel/watchdog_thresh in
+	order to reduce the frequency of OS jitter due to the watchdog
+	timer down to a level that is acceptable for your workload.

Documentation/power/devices.txt

···
 System Power Management Phases
 ------------------------------
 Suspending or resuming the system is done in several phases.  Different phases
-are used for standby or memory sleep states ("suspend-to-RAM") and the
+are used for freeze, standby, and memory sleep states ("suspend-to-RAM") and the
 hibernation state ("suspend-to-disk").  Each phase involves executing callbacks
 for every device before the next phase begins.  Not all busses or classes
 support all these callbacks and not all drivers use all the callbacks.  The
···
 
 Entering System Suspend
 -----------------------
-When the system goes into the standby or memory sleep state, the phases are:
+When the system goes into the freeze, standby or memory sleep state,
+the phases are:
 
 		prepare, suspend, suspend_late, suspend_noirq.
 
···
 
 Leaving System Suspend
 ----------------------
-When resuming from standby or memory sleep, the phases are:
+When resuming from freeze, standby or memory sleep, the phases are:
 
 		resume_noirq, resume_early, resume, complete.
 
···
 
 Entering Hibernation
 --------------------
-Hibernating the system is more complicated than putting it into the standby or
-memory sleep state, because it involves creating and saving a system image.
+Hibernating the system is more complicated than putting it into the other
+sleep states, because it involves creating and saving a system image.
 Therefore there are more phases for hibernation, with a different set of
 callbacks.  These phases always run after tasks have been frozen and memory has
 been freed.
···
 
 At this point the system image is saved, and the devices then need to be
 prepared for the upcoming system shutdown.  This is much like suspending them
-before putting the system into the standby or memory sleep state, and the phases
-are similar.
+before putting the system into the freeze, standby or memory sleep state,
+and the phases are similar.
 
     9.	The prepare phase is discussed above.
 

Documentation/power/interface.txt

···
 is mounted at /sys). 
 
 /sys/power/state controls system power state. Reading from this file
-returns what states are supported, which is hard-coded to 'standby'
-(Power-On Suspend), 'mem' (Suspend-to-RAM), and 'disk'
+returns what states are supported, which is hard-coded to 'freeze',
+'standby' (Power-On Suspend), 'mem' (Suspend-to-RAM), and 'disk'
 (Suspend-to-Disk). 
 
 Writing to this file one of those strings causes the system to

Documentation/power/notifiers.txt

···
 The subsystems or drivers having such needs can register suspend notifiers that
 will be called upon the following events by the PM core:
 
-PM_HIBERNATION_PREPARE	The system is going to hibernate or suspend, tasks will
-			be frozen immediately.
+PM_HIBERNATION_PREPARE	The system is going to hibernate, tasks will be frozen
+			immediately. This is different from PM_SUSPEND_PREPARE
+			below because here we do additional work between notifiers
+			and drivers freezing.
 
 PM_POST_HIBERNATION	The system memory state has been restored from a
 			hibernation image or an error occurred during

Documentation/power/states.txt

···
 System Power Management States
 
 
-The kernel supports three power management states generically, though
-each is dependent on platform support code to implement the low-level
-details for each state. This file describes each state, what they are
+The kernel supports four power management states generically, though
+one is generic and the other three are dependent on platform support
+code to implement the low-level details for each state.
+This file describes each state, what they are
 commonly called, what ACPI state they map to, and what string to write
 to /sys/power/state to enter that state
+
+state:		Freeze / Low-Power Idle
+ACPI state:	S0
+String:		"freeze"
+
+This state is a generic, pure software, light-weight, low-power state.
+It allows more energy to be saved relative to idle by freezing user
+space and putting all I/O devices into low-power states (possibly
+lower-power than available at run time), such that the processors can
+spend more time in their idle states.
+This state can be used for platforms without Standby/Suspend-to-RAM
+support, or it can be used in addition to Suspend-to-RAM (memory sleep)
+to provide reduced resume latency.
 
 
 State:		Standby / Power-On Suspend
···
 We try to put devices in a low-power state equivalent to D1, which
 also offers low power savings, but low resume latency. Not all devices
 support D1, and those that don't are left on. 
-
-A transition from Standby to the On state should take about 1-2
-seconds. 
 
 
 State:		Suspend-to-RAM
···
 
 For at least ACPI, STR requires some minimal boot-strapping code to
 resume the system from STR. This may be true on other platforms. 
-
-A transition from Suspend-to-RAM to the On state should take about
-3-5 seconds. 
 
 
 State:		Suspend-to-disk
···
 down offers greater savings, and allows this mechanism to work on any
 system. However, entering a real low-power state allows the user to
 trigger wake up events (e.g. pressing a key or opening a laptop lid).
-
-A transition from Suspend-to-Disk to the On state should take about 30
-seconds, though it's typically a bit more with the current
-implementation. 

MAINTAINERS

···
 F:	Documentation/hwmon/lm90
 F:	drivers/hwmon/lm90.c
 
+LM95234 HARDWARE MONITOR DRIVER
+M:	Guenter Roeck <[e-mail]>
+L:	[e-mail]
+S:	Maintained
+F:	Documentation/hwmon/lm95234
+F:	drivers/hwmon/lm95234.c
+
 LME2510 MEDIA DRIVER
 M:	Malcolm Priestley <[e-mail]>
 L:	[e-mail]
···
 L:	[e-mail]
 L:	http://groups.google.com/group/linux-iscsi-target-dev
 W:	http://www.linux-iscsi.org
-T:	git git://git.kernel.org/pub/scm/linux/kernel/git/nab/lio-core.git master
+T:	git git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending.git master
 S:	Supported
 F:	drivers/target/
 F:	include/target/
···
 F:	drivers/mmc/host/sh_mobile_sdhi.c
 F:	include/linux/mmc/tmio.h
 F:	include/linux/mmc/sh_mobile_sdhi.h
+
+TMP401 HARDWARE MONITOR DRIVER
+M:	Guenter Roeck <[e-mail]>
+L:	[e-mail]
+S:	Maintained
+F:	Documentation/hwmon/tmp401
+F:	drivers/hwmon/tmp401.c
 
 TMPFS (SHMEM FILESYSTEM)
 M:	Hugh Dickins <[e-mail]>

Makefile

···
 VERSION = 3
 PATCHLEVEL = 10
 SUBLEVEL = 0
-EXTRAVERSION = -rc1
+EXTRAVERSION = -rc2
 NAME = Unicycling Gorilla
 
 # *DOCUMENTATION*

arch/Kconfig

···
 config GENERIC_SMP_IDLE_THREAD
        bool
 
+config GENERIC_IDLE_POLL_SETUP
+       bool
+
 # Select if arch init_task initializer is different to init/init_task.c
 config ARCH_INIT_TASK
        bool

arch/arm/Kconfig

···
 	select HAVE_GENERIC_HARDIRQS
 	select HAVE_HW_BREAKPOINT if (PERF_EVENTS && (CPU_V6 || CPU_V6K || CPU_V7))
 	select HAVE_IDE if PCI || ISA || PCMCIA
+	select HAVE_IRQ_TIME_ACCOUNTING
 	select HAVE_KERNEL_GZIP
 	select HAVE_KERNEL_LZMA
 	select HAVE_KERNEL_LZO
···
 config ARCH_DOVE
 	bool "Marvell Dove"
 	select ARCH_REQUIRE_GPIOLIB
-	select CPU_V7
+	select CPU_PJ4
 	select GENERIC_CLOCKEVENTS
 	select MIGHT_HAVE_PCI
 	select PINCTRL

arch/arm/Makefile

···
   echo  '  Image         - Uncompressed kernel image (arch/$(ARCH)/boot/Image)'
   echo  '* xipImage      - XIP kernel image, if configured (arch/$(ARCH)/boot/xipImage)'
   echo  '  uImage        - U-Boot wrapped zImage'
-  echo  '  bootpImage    - Combined zImage and initial RAM disk' 
+  echo  '  bootpImage    - Combined zImage and initial RAM disk'
   echo  '                  (supply initrd image via make variable INITRD=<path>)'
   echo  '* dtbs          - Build device tree blobs for enabled boards'
   echo  '  install       - Install uncompressed kernel'

arch/arm/common/mcpm_platsmp.c

···
 #include <linux/smp.h>
 #include <linux/spinlock.h>
 
-#include <linux/irqchip/arm-gic.h>
-
 #include <asm/mcpm.h>
 #include <asm/smp.h>
 #include <asm/smp_plat.h>
···
 static void __cpuinit mcpm_secondary_init(unsigned int cpu)
 {
 	mcpm_cpu_powered_up();
-	gic_secondary_init(0);
 }
 
 #ifdef CONFIG_HOTPLUG_CPU

arch/arm/include/asm/cmpxchg.h

···
 	((__typeof__(*(ptr)))atomic64_cmpxchg(container_of((ptr),	\
 						atomic64_t,		\
 						counter),		\
-					      (unsigned long)(o),	\
-					      (unsigned long)(n)))
+					      (unsigned long long)(o),	\
+					      (unsigned long long)(n)))
 
 #define cmpxchg64_local(ptr, o, n)					\
 	((__typeof__(*(ptr)))local64_cmpxchg(container_of((ptr),	\
 						local64_t,		\
 						a),			\
-					     (unsigned long)(o),	\
-					     (unsigned long)(n)))
+					     (unsigned long long)(o),	\
+					     (unsigned long long)(n)))
 
 #endif	/* __LINUX_ARM_ARCH__ >= 6 */
 

arch/arm/mach-tegra/tegra2_emc.c

···
 	}
 
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (!res) {
-		dev_err(&pdev->dev, "missing register base\n");
-		return -ENOMEM;
-	}
-
 	emc_regbase = devm_ioremap_resource(&pdev->dev, res);
 	if (IS_ERR(emc_regbase))
 		return PTR_ERR(emc_regbase);

arch/arm/plat-samsung/adc.c

···
 	}
 
 	regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (!regs) {
-		dev_err(dev, "failed to find registers\n");
-		return -ENXIO;
-	}
-
 	adc->regs = devm_ioremap_resource(dev, regs);
 	if (IS_ERR(adc->regs))
 		return PTR_ERR(adc->regs);

arch/arm/xen/enlighten.c

···
 }
 EXPORT_SYMBOL_GPL(xen_unmap_domain_mfn_range);
 
-static int __init xen_secondary_init(unsigned int cpu)
+static void __init xen_percpu_init(void *unused)
 {
 	struct vcpu_register_vcpu_info info;
 	struct vcpu_info *vcpup;
 	int err;
+	int cpu = get_cpu();
 
 	pr_info("Xen: initializing cpu%d\n", cpu);
 	vcpup = per_cpu_ptr(xen_vcpu_info, cpu);
···
 	info.offset = offset_in_page(vcpup);
 
 	err = HYPERVISOR_vcpu_op(VCPUOP_register_vcpu_info, cpu, &info);
-	if (err) {
-		pr_debug("register_vcpu_info failed: err=%d\n", err);
-	} else {
-		/* This cpu is using the registered vcpu info, even if
-		   later ones fail to. */
-		per_cpu(xen_vcpu, cpu) = vcpup;
-	}
-	return 0;
+	BUG_ON(err);
+	per_cpu(xen_vcpu, cpu) = vcpup;
+
+	enable_percpu_irq(xen_events_irq, 0);
 }
 
 static void xen_restart(char str, const char *cmd)
···
 	const char *version = NULL;
 	const char *xen_prefix = "xen,xen-";
 	struct resource res;
-	int i;
 
 	node = of_find_compatible_node(NULL, NULL, "xen,xen");
 	if (!node) {
···
 			                       sizeof(struct vcpu_info));
 	if (xen_vcpu_info == NULL)
 		return -ENOMEM;
-	for_each_online_cpu(i)
-		xen_secondary_init(i);
 
 	gnttab_init();
 	if (!xen_initial_domain())
 		xenbus_probe(NULL);
 
+	return 0;
+}
+core_initcall(xen_guest_init);
+
+static int __init xen_pm_init(void)
+{
 	pm_power_off = xen_power_off;
 	arm_pm_restart = xen_restart;
 
 	return 0;
 }
-core_initcall(xen_guest_init);
+subsys_initcall(xen_pm_init);
 
 static irqreturn_t xen_arm_callback(int irq, void *arg)
 {
 	xen_hvm_evtchn_do_upcall();
 	return IRQ_HANDLED;
-}
-
-static __init void xen_percpu_enable_events(void *unused)
-{
-	enable_percpu_irq(xen_events_irq, 0);
 }
 
 static int __init xen_init_events(void)
···
 		return -EINVAL;
 	}
 
-	on_each_cpu(xen_percpu_enable_events, NULL, 0);
+	on_each_cpu(xen_percpu_init, NULL, 0);
 
 	return 0;
 }

arch/arm64/Kconfig

···
 
 menu "Kernel Features"
 
-source "kernel/time/Kconfig"
-
 config ARM64_64K_PAGES
 	bool "Enable 64KB pages support"
 	help

arch/arm64/include/asm/assembler.h

···
 
 	.macro	enable_dbg_if_not_stepping, tmp
 	mrs	\tmp, mdscr_el1
-	tbnz	\tmp, #1, 9990f
+	tbnz	\tmp, #0, 9990f
 	enable_dbg
 9990:
 	.endm

arch/arm64/kernel/debug-monitors.c

···
  */
 static void clear_os_lock(void *unused)
 {
-	asm volatile("msr mdscr_el1, %0" : : "r" (0));
-	isb();
 	asm volatile("msr oslar_el1, %0" : : "r" (0));
 	isb();
 }

arch/arm64/kernel/early_printk.c

···
 	}
 }
 
-static struct console early_console = {
+static struct console early_console_dev = {
 	.name =		"earlycon",
 	.write =	early_write,
 	.flags =	CON_PRINTBUFFER | CON_BOOT,
···
 		early_base = early_io_map(paddr, EARLYCON_IOBASE);
 
 	printch = match->printch;
-	register_console(&early_console);
+	early_console = &early_console_dev;
+	register_console(&early_console_dev);
 
 	return 0;
 }

arch/arm64/kernel/setup.c

···
 #endif
 }
 
-static int __init arm64_of_clk_init(void)
+static int __init arm64_device_init(void)
 {
 	of_clk_init(NULL);
+	of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
 	return 0;
 }
-arch_initcall(arm64_of_clk_init);
+arch_initcall(arm64_device_init);
 
 static DEFINE_PER_CPU(struct cpu, cpu_data);
 
···
 	return 0;
 }
 subsys_initcall(topology_init);
-
-static int __init arm64_device_probe(void)
-{
-	of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
-	return 0;
-}
-device_initcall(arm64_device_probe);
 
 static const char *hwcap_str[] = {
 	"fp",

arch/arm64/mm/cache.S

···
 	add	x2, x2, #4			// add 4 (line length offset)
 	mov	x4, #0x3ff
 	and	x4, x4, x1, lsr #3		// find maximum number on the way size
-	clz	x5, x4				// find bit position of way size increment
+	clz	w5, w4				// find bit position of way size increment
 	mov	x7, #0x7fff
 	and	x7, x7, x1, lsr #13		// extract max number of the index size
 loop2:

arch/arm64/mm/proc.S

···
 
 	mov	x0, #3 << 20
 	msr	cpacr_el1, x0			// Enable FP/ASIMD
-	mov	x0, #1
-	msr	oslar_el1, x0			// Set the debug OS lock
+	msr	mdscr_el1, xzr			// Reset mdscr_el1
 	tlbi	vmalle1is			// invalidate I + D TLBs
 	/*
 	 * Memory region attributes for LPAE:

arch/mips/include/asm/io.h

···
  */
 static inline unsigned long virt_to_phys(volatile const void *address)
 {
-	return (unsigned long)address - PAGE_OFFSET + PHYS_OFFSET;
+	return __pa(address);
 }
 
 /*

arch/mips/include/asm/kvm_host.h

···
 #define VPN2_MASK           0xffffe000
 #define TLB_IS_GLOBAL(x)    (((x).tlb_lo0 & MIPS3_PG_G) && ((x).tlb_lo1 & MIPS3_PG_G))
 #define TLB_VPN2(x)         ((x).tlb_hi & VPN2_MASK)
-#define TLB_ASID(x)         (ASID_MASK((x).tlb_hi))
+#define TLB_ASID(x)         ((x).tlb_hi & ASID_MASK)
 #define TLB_IS_VALID(x, va) (((va) & (1 << PAGE_SHIFT)) ? ((x).tlb_lo1 & MIPS3_PG_V) : ((x).tlb_lo0 & MIPS3_PG_V))
 
 struct kvm_mips_tlb {

arch/mips/include/asm/mmu_context.h

···
 	TLBMISS_HANDLER_SETUP_PGD(swapper_pg_dir)
 #endif
 #endif /* CONFIG_MIPS_PGD_C0_CONTEXT*/
+#if defined(CONFIG_CPU_R3000) || defined(CONFIG_CPU_TX39XX)
 
-#define ASID_INC(asid)						\
-({								\
-	unsigned long __asid = asid;				\
-	__asm__("1:\taddiu\t%0,1\t\t\t\t# patched\n\t"		\
-	".section\t__asid_inc,\"a\"\n\t"			\
-	".word\t1b\n\t"						\
-	".previous"						\
-	:"=r" (__asid)						\
-	:"0" (__asid));						\
-	__asid;							\
-})
-#define ASID_MASK(asid)						\
-({								\
-	unsigned long __asid = asid;				\
-	__asm__("1:\tandi\t%0,%1,0xfc0\t\t\t# patched\n\t"	\
-	".section\t__asid_mask,\"a\"\n\t"			\
-	".word\t1b\n\t"						\
-	".previous"						\
-	:"=r" (__asid)						\
-	:"r" (__asid));						\
-	__asid;							\
-})
-#define ASID_VERSION_MASK					\
-({								\
-	unsigned long __asid;					\
-	__asm__("1:\taddiu\t%0,$0,0xff00\t\t\t\t# patched\n\t"	\
-	".section\t__asid_version_mask,\"a\"\n\t"		\
-	".word\t1b\n\t"						\
-	".previous"						\
-	:"=r" (__asid));					\
-	__asid;							\
-})
-#define ASID_FIRST_VERSION					\
-({								\
-	unsigned long __asid = asid;				\
-	__asm__("1:\tli\t%0,0x100\t\t\t\t# patched\n\t"		\
-	".section\t__asid_first_version,\"a\"\n\t"		\
-	".word\t1b\n\t"						\
-	".previous"						\
-	:"=r" (__asid));					\
-	__asid;							\
-})
+#define ASID_INC	0x40
+#define ASID_MASK	0xfc0
 
-#define ASID_FIRST_VERSION_R3000	0x1000
-#define ASID_FIRST_VERSION_R4000	0x100
-#define ASID_FIRST_VERSION_R8000	0x1000
-#define ASID_FIRST_VERSION_RM9000	0x1000
+#elif defined(CONFIG_CPU_R8000)
 
-#ifdef CONFIG_MIPS_MT_SMTC
-#define SMTC_HW_ASID_MASK		0xff
-extern unsigned int smtc_asid_mask;
+#define ASID_INC	0x10
+#define ASID_MASK	0xff0
+
+#elif defined(CONFIG_MIPS_MT_SMTC)
+
+#define ASID_INC	0x1
+extern unsigned long smtc_asid_mask;
+#define ASID_MASK	(smtc_asid_mask)
+#define HW_ASID_MASK	0xff
+/* End SMTC/34K debug hack */
+#else /* FIXME: not correct for R6000 */
+
+#define ASID_INC	0x1
+#define ASID_MASK	0xff
+
 #endif
 
 #define cpu_context(cpu, mm)	((mm)->context.asid[cpu])
-#define cpu_asid(cpu, mm)	ASID_MASK(cpu_context((cpu), (mm)))
+#define cpu_asid(cpu, mm)	(cpu_context((cpu), (mm)) & ASID_MASK)
 #define asid_cache(cpu)		(cpu_data[cpu].asid_cache)
 
 static inline void enter_lazy_tlb(struct mm_struct *mm, struct task_struct *tsk)
 {
 }
+
+/*
+ *  All unused by hardware upper bits will be considered
+ *  as a software asid extension.
+ */
+#define ASID_VERSION_MASK  ((unsigned long)~(ASID_MASK|(ASID_MASK-1)))
+#define ASID_FIRST_VERSION ((unsigned long)(~ASID_VERSION_MASK) + 1)
 
 #ifndef CONFIG_MIPS_MT_SMTC
 /* Normal, classic MIPS get_new_mmu_context */
···
 	extern void kvm_local_flush_tlb_all(void);
 	unsigned long asid = asid_cache(cpu);
 
-	if (!ASID_MASK((asid = ASID_INC(asid)))) {
+	if (! ((asid += ASID_INC) & ASID_MASK) ) {
 		if (cpu_has_vtag_icache)
 			flush_icache_all();
 #ifdef CONFIG_VIRTUALIZATION
···
 	 * free up the ASID value for use and flush any old
 	 * instances of it from the TLB.
 	 */
-	oldasid = ASID_MASK(read_c0_entryhi());
+	oldasid = (read_c0_entryhi() & ASID_MASK);
 	if(smtc_live_asid[mytlb][oldasid]) {
 		smtc_live_asid[mytlb][oldasid] &= ~(0x1 << cpu);
 		if(smtc_live_asid[mytlb][oldasid] == 0)
···
 	 * having ASID_MASK smaller than the hardware maximum,
 	 * make sure no "soft" bits become "hard"...
 	 */
-	write_c0_entryhi((read_c0_entryhi() & ~SMTC_HW_ASID_MASK) |
+	write_c0_entryhi((read_c0_entryhi() & ~HW_ASID_MASK) |
 			 cpu_asid(cpu, next));
 	ehb(); /* Make sure it propagates to TCStatus */
 	evpe(mtflags);
···
 #ifdef CONFIG_MIPS_MT_SMTC
 	/* See comments for similar code above */
 	mtflags = dvpe();
-	oldasid = ASID_MASK(read_c0_entryhi());
+	oldasid = read_c0_entryhi() & ASID_MASK;
 	if(smtc_live_asid[mytlb][oldasid]) {
 		smtc_live_asid[mytlb][oldasid] &= ~(0x1 << cpu);
 		if(smtc_live_asid[mytlb][oldasid] == 0)
 			 smtc_flush_tlb_asid(oldasid);
 	}
 	/* See comments for similar code above */
-	write_c0_entryhi((read_c0_entryhi() & ~SMTC_HW_ASID_MASK) |
-	                 cpu_asid(cpu, next));
+	write_c0_entryhi((read_c0_entryhi() & ~HW_ASID_MASK) |
+			 cpu_asid(cpu, next));
 	ehb(); /* Make sure it propagates to TCStatus */
 	evpe(mtflags);
 #else
···
 #ifdef CONFIG_MIPS_MT_SMTC
 		/* See comments for similar code above */
 		prevvpe = dvpe();
-		oldasid = ASID_MASK(read_c0_entryhi());
+		oldasid = (read_c0_entryhi() & ASID_MASK);
 		if (smtc_live_asid[mytlb][oldasid]) {
 			smtc_live_asid[mytlb][oldasid] &= ~(0x1 << cpu);
 			if(smtc_live_asid[mytlb][oldasid] == 0)
 				smtc_flush_tlb_asid(oldasid);
 		}
 		/* See comments for similar code above */
-		write_c0_entryhi((read_c0_entryhi() & ~SMTC_HW_ASID_MASK)
+		write_c0_entryhi((read_c0_entryhi() & ~HW_ASID_MASK)
 				| cpu_asid(cpu, mm));
 		ehb(); /* Make sure it propagates to TCStatus */
 		evpe(prevvpe);

arch/mips/include/asm/page.h

···
 #endif /* CONFIG_MIPS_HUGE_TLB_SUPPORT */
 
 #include <linux/pfn.h>
-#include <asm/io.h>
 
 extern void build_clear_page(void);
 extern void build_copy_page(void);
···
     ((unsigned long)(x) - PAGE_OFFSET + PHYS_OFFSET)
 #endif
 #define __va(x)		((void *)((unsigned long)(x) + PAGE_OFFSET - PHYS_OFFSET))
+#include <asm/io.h>
 
 /*
  * RELOC_HIDE was originally added by 6007b903dfe5f1d13e0c711ac2894bdd4a61b1ad

arch/mips/kernel/crash_dump.c

···
 #include <linux/bootmem.h>
 #include <linux/crash_dump.h>
 #include <asm/uaccess.h>
+#include <linux/slab.h>
 
 static int __init parse_savemaxmem(char *p)
 {

arch/mips/kernel/genex.S

···
 	.set	noreorder
 	/* check if TLB contains a entry for EPC */
 	MFC0	k1, CP0_ENTRYHI
-	andi	k1, 0xff	/* ASID_MASK patched at run-time!! */
+	andi	k1, 0xff	/* ASID_MASK */
 	MFC0	k0, CP0_EPC
 	PTR_SRL k0, _PAGE_SHIFT + 1
 	PTR_SLL k0, _PAGE_SHIFT + 1

arch/mips/kernel/process.c

···
 	int		pc_offset;
 };
 
+#define J_TARGET(pc,target)	\
+		(((unsigned long)(pc) & 0xf0000000) | ((target) << 2))
+
 static inline int is_ra_save_ins(union mips_instruction *ip)
 {
 #ifdef CONFIG_CPU_MICROMIPS
···
 #endif
 }
 
-static inline int is_jal_jalr_jr_ins(union mips_instruction *ip)
+static inline int is_jump_ins(union mips_instruction *ip)
 {
 #ifdef CONFIG_CPU_MICROMIPS
 	/*
···
 		return 0;
 	return (((ip->u_format.uimmediate >> 6) & mm_jalr_op) == mm_jalr_op);
 #else
+	if (ip->j_format.opcode == j_op)
+		return 1;
 	if (ip->j_format.opcode == jal_op)
 		return 1;
 	if (ip->r_format.opcode != spec_op)
···
 
 	for (i = 0; i < max_insns; i++, ip++) {
 
-		if (is_jal_jalr_jr_ins(ip))
+		if (is_jump_ins(ip))
 			break;
 		if (!info->frame_size) {
 			if (is_sp_move_ins(ip))
···
 
 static struct mips_frame_info schedule_mfi __read_mostly;
 
+#ifdef CONFIG_KALLSYMS
+static unsigned long get___schedule_addr(void)
+{
+	return kallsyms_lookup_name("__schedule");
+}
+#else
+static unsigned long get___schedule_addr(void)
+{
+	union mips_instruction *ip = (void *)schedule;
+	int max_insns = 8;
+	int i;
+
+	for (i = 0; i < max_insns; i++, ip++) {
+		if (ip->j_format.opcode == j_op)
+			return J_TARGET(ip, ip->j_format.target);
+	}
+	return 0;
+}
+#endif
+
 static int __init frame_info_init(void)
 {
 	unsigned long size = 0;
 #ifdef CONFIG_KALLSYMS
 	unsigned long ofs;
-
-	kallsyms_lookup_size_offset((unsigned long)schedule, &size, &ofs);
 #endif
-	schedule_mfi.func = schedule;
+	unsigned long addr;
+
+	addr = get___schedule_addr();
+	if (!addr)
+		addr = (unsigned long)schedule;
+
+#ifdef CONFIG_KALLSYMS
+	kallsyms_lookup_size_offset(addr, &size, &ofs);
+#endif
+	schedule_mfi.func = (void *)addr;
 	schedule_mfi.func_size = size;
 
 	get_frame_info(&schedule_mfi);

arch/mips/kernel/smtc.c

···
 static int ipibuffers;
 static int nostlb;
 static int asidmask;
-unsigned int smtc_asid_mask = 0xff;
+unsigned long smtc_asid_mask = 0xff;
 
 static int __init vpe0tcs(char *str)
 {
···
 	asid = asid_cache(cpu);
 
 	do {
-		if (!ASID_MASK(ASID_INC(asid))) {
+		if (!((asid += ASID_INC) & ASID_MASK) ) {
 			if (cpu_has_vtag_icache)
 				flush_icache_all();
 			/* Traverse all online CPUs (hack requires contiguous range) */
···
 						mips_ihb();
 					}
 					tcstat = read_tc_c0_tcstatus();
-					smtc_live_asid[tlb][ASID_MASK(tcstat)] |= (asiduse)(0x1 << i);
+					smtc_live_asid[tlb][(tcstat & ASID_MASK)] |= (asiduse)(0x1 << i);
 					if (!prevhalt)
 						write_tc_c0_tchalt(0);
 				}
···
 				asid = ASID_FIRST_VERSION;
 			local_flush_tlb_all();	/* start new asid cycle */
 		}
-	} while (smtc_live_asid[tlb][ASID_MASK(asid)]);
+	} while (smtc_live_asid[tlb][(asid & ASID_MASK)]);
 
 	/*
 	 * SMTC shares the TLB within VPEs and possibly across all VPEs.
···
 		tlb_read();
 		ehb();
 		ehi = read_c0_entryhi();
-		if (ASID_MASK(ehi) == asid) {
+		if ((ehi & ASID_MASK) == asid) {
 		    /*
 		     * Invalidate only entries with specified ASID,
 		     * makiing sure all entries differ.

arch/mips/kernel/traps.c

···
 	unsigned int cpu = smp_processor_id();
 	unsigned int status_set = ST0_CU0;
 	unsigned int hwrena = cpu_hwrena_impl_bits;
-	unsigned long asid = 0;
 #ifdef CONFIG_MIPS_MT_SMTC
 	int secondaryTC = 0;
 	int bootTC = (cpu == 0);
···
 	}
 #endif /* CONFIG_MIPS_MT_SMTC */
 
-	asid = ASID_FIRST_VERSION;
-	cpu_data[cpu].asid_cache = asid;
-	TLBMISS_HANDLER_SETUP();
+	if (!cpu_data[cpu].asid_cache)
+		cpu_data[cpu].asid_cache = ASID_FIRST_VERSION;
 
 	atomic_inc(&init_mm.mm_count);
 	current->active_mm = &init_mm;

arch/mips/kvm/kvm_mips_emul.c

···
 				printk("MTCz, cop0->reg[EBASE]: %#lx\n",
 				       kvm_read_c0_guest_ebase(cop0));
 			} else if (rd == MIPS_CP0_TLB_HI && sel == 0) {
-				uint32_t nasid = ASID_MASK(vcpu->arch.gprs[rt]);
+				uint32_t nasid =
+				    vcpu->arch.gprs[rt] & ASID_MASK;
 				if ((KSEGX(vcpu->arch.gprs[rt]) != CKSEG0)
 				    &&
-				    (ASID_MASK(kvm_read_c0_guest_entryhi(cop0))
-				      != nasid)) {
+				    ((kvm_read_c0_guest_entryhi(cop0) &
+				      ASID_MASK) != nasid)) {
 
 					kvm_debug
 					    ("MTCz, change ASID from %#lx to %#lx\n",
-					     ASID_MASK(kvm_read_c0_guest_entryhi(cop0)),
-					     ASID_MASK(vcpu->arch.gprs[rt]));
+					     kvm_read_c0_guest_entryhi(cop0) &
+					     ASID_MASK,
+					     vcpu->arch.gprs[rt] & ASID_MASK);
 
 					/* Blow away the shadow host TLBs */
 					kvm_mips_flush_host_tlb(1);
···
 		 * resulting handler will do the right thing
 		 */
 		index = kvm_mips_guest_tlb_lookup(vcpu, (va & VPN2_MASK) |
-						  ASID_MASK(kvm_read_c0_guest_entryhi(cop0)));
+						  (kvm_read_c0_guest_entryhi
+						   (cop0) & ASID_MASK));
 
 		if (index < 0) {
 			vcpu->arch.host_cp0_entryhi = (va & VPN2_MASK);
···
 	struct kvm_vcpu_arch *arch = &vcpu->arch;
 	enum emulation_result er = EMULATE_DONE;
 	unsigned long entryhi = (vcpu->arch.  host_cp0_badvaddr & VPN2_MASK) |
-				ASID_MASK(kvm_read_c0_guest_entryhi(cop0));
+				(kvm_read_c0_guest_entryhi(cop0) & ASID_MASK);
 
 	if ((kvm_read_c0_guest_status(cop0) & ST0_EXL) == 0) {
 		/* save old pc */
···
 	enum emulation_result er = EMULATE_DONE;
 	unsigned long entryhi =
 		(vcpu->arch.host_cp0_badvaddr & VPN2_MASK) |
-		ASID_MASK(kvm_read_c0_guest_entryhi(cop0));
+		(kvm_read_c0_guest_entryhi(cop0) & ASID_MASK);
 
 	if ((kvm_read_c0_guest_status(cop0) & ST0_EXL) == 0) {
 		/* save old pc */
···
 	struct kvm_vcpu_arch *arch = &vcpu->arch;
 	enum emulation_result er = EMULATE_DONE;
 	unsigned long entryhi = (vcpu->arch.host_cp0_badvaddr & VPN2_MASK) |
-				ASID_MASK(kvm_read_c0_guest_entryhi(cop0));
+				(kvm_read_c0_guest_entryhi(cop0) & ASID_MASK);
 
 	if ((kvm_read_c0_guest_status(cop0) & ST0_EXL) == 0) {
 		/* save old pc */
···
 	struct kvm_vcpu_arch *arch = &vcpu->arch;
 	enum emulation_result er = EMULATE_DONE;
 	unsigned long entryhi = (vcpu->arch.host_cp0_badvaddr & VPN2_MASK) |
-		ASID_MASK(kvm_read_c0_guest_entryhi(cop0));
+		(kvm_read_c0_guest_entryhi(cop0) & ASID_MASK);
 
 	if ((kvm_read_c0_guest_status(cop0) & ST0_EXL) == 0) {
 		/* save old pc */
···
 {
 	struct mips_coproc *cop0 = vcpu->arch.cop0;
 	unsigned long entryhi = (vcpu->arch.host_cp0_badvaddr & VPN2_MASK) |
-				ASID_MASK(kvm_read_c0_guest_entryhi(cop0));
+				(kvm_read_c0_guest_entryhi(cop0) & ASID_MASK);
 	struct kvm_vcpu_arch *arch = &vcpu->arch;
 	enum emulation_result er = EMULATE_DONE;
 
···
 	 */
 	index = kvm_mips_guest_tlb_lookup(vcpu,
 					  (va & VPN2_MASK) |
-					  ASID_MASK(kvm_read_c0_guest_entryhi
-					   (vcpu->arch.cop0)));
+					  (kvm_read_c0_guest_entryhi
+					   (vcpu->arch.cop0) & ASID_MASK));
 	if (index < 0) {
 		if (exccode == T_TLB_LD_MISS) {
 			er = kvm_mips_emulate_tlbmiss_ld(cause, opc, run, vcpu);

arch/mips/kvm/kvm_tlb.c

···
 
 uint32_t kvm_mips_get_kernel_asid(struct kvm_vcpu *vcpu)
 {
-	return ASID_MASK(vcpu->arch.guest_kernel_asid[smp_processor_id()]);
+	return vcpu->arch.guest_kernel_asid[smp_processor_id()] & ASID_MASK;
 }
 
 
 uint32_t kvm_mips_get_user_asid(struct kvm_vcpu *vcpu)
 {
-	return ASID_MASK(vcpu->arch.guest_user_asid[smp_processor_id()]);
+	return vcpu->arch.guest_user_asid[smp_processor_id()] & ASID_MASK;
 }
 
 inline uint32_t kvm_mips_get_commpage_asid (struct kvm_vcpu *vcpu)
···
 	old_pagemask = read_c0_pagemask();
 
 	printk("HOST TLBs:\n");
-	printk("ASID: %#lx\n", ASID_MASK(read_c0_entryhi()));
+	printk("ASID: %#lx\n", read_c0_entryhi() & ASID_MASK);
 
 	for (i = 0; i < current_cpu_data.tlbsize; i++) {
 		write_c0_index(i);
···
 
 	for (i = 0; i < KVM_MIPS_GUEST_TLB_SIZE; i++) {
 		if (((TLB_VPN2(tlb[i]) & ~tlb[i].tlb_mask) == ((entryhi & VPN2_MASK) & ~tlb[i].tlb_mask)) &&
-			(TLB_IS_GLOBAL(tlb[i]) || (TLB_ASID(tlb[i]) == ASID_MASK(entryhi)))) {
+			(TLB_IS_GLOBAL(tlb[i]) || (TLB_ASID(tlb[i]) == (entryhi & ASID_MASK)))) {
 			index = i;
 			break;
 		}
···
 {
 	unsigned long asid = asid_cache(cpu);
 
-	if (!(ASID_MASK(ASID_INC(asid)))) {
+	if (!((asid += ASID_INC) & ASID_MASK)) {
 		if (cpu_has_vtag_icache) {
 			flush_icache_all();
 		}
···
 	if (!newasid) {
 		/* If we preempted while the guest was executing, then reload the pre-empted ASID */
 		if (current->flags & PF_VCPU) {
-			write_c0_entryhi(ASID_MASK(vcpu->arch.preempt_entryhi));
+			write_c0_entryhi(vcpu->arch.
+					 preempt_entryhi & ASID_MASK);
 			ehb();
 		}
 	} else {
···
 		 */
 		if (current->flags & PF_VCPU) {
 			if (KVM_GUEST_KERNEL_MODE(vcpu))
-				write_c0_entryhi(ASID_MASK(vcpu->arch.
-						 guest_kernel_asid[cpu]));
+				write_c0_entryhi(vcpu->arch.
+						 guest_kernel_asid[cpu] &
+						 ASID_MASK);
 			else
-				write_c0_entryhi(ASID_MASK(vcpu->arch.
-						 guest_user_asid[cpu]));
+				write_c0_entryhi(vcpu->arch.
+						 guest_user_asid[cpu] &
+						 ASID_MASK);
 			ehb();
 		}
 	}
···
 			    kvm_mips_guest_tlb_lookup(vcpu,
 						      ((unsigned long) opc & VPN2_MASK)
 						      |
-						      ASID_MASK(kvm_read_c0_guest_entryhi(cop0)));
+						      (kvm_read_c0_guest_entryhi
+						       (cop0) & ASID_MASK));
 			if (index < 0) {
 				kvm_err
 				    ("%s: get_user_failed for %p, vcpu: %p, ASID: %#lx\n",

arch/mips/lantiq/xway/gptu.c

···
 	}
 
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (!res) {
-		dev_err(&pdev->dev, "Failed to get resource\n");
-		return -ENOMEM;
-	}
 
 	/* remap gptu register range */
 	gptu_membase = devm_ioremap_resource(&pdev->dev, res);
···
 	if (((gptu_r32(GPTU_ID) >> 8) & 0xff) != GPTU_MAGIC) {
 		dev_err(&pdev->dev, "Failed to find magic\n");
 		gptu_hwexit();
+		clk_disable(clk);
+		clk_put(clk);
 		return -ENAVAIL;
 	}
 

arch/mips/lib/dump_tlb.c

···
 #include <asm/page.h>
 #include <asm/pgtable.h>
 #include <asm/tlbdebug.h>
-#include <asm/mmu_context.h>
 
 static inline const char *msk2str(unsigned int mask)
 {
···
 	s_pagemask = read_c0_pagemask();
 	s_entryhi = read_c0_entryhi();
 	s_index = read_c0_index();
-	asid = ASID_MASK(s_entryhi);
+	asid = s_entryhi & 0xff;
 
 	for (i = first; i <= last; i++) {
 		write_c0_index(i);
···
 
 			printk("va=%0*lx asid=%02lx\n",
 			       width, (entryhi & ~0x1fffUL),
-			       ASID_MASK(entryhi));
+			       entryhi & 0xff);
 			printk("\t[pa=%0*llx c=%d d=%d v=%d g=%d] ",
 			       width,
 			       (entrylo0 << 6) & PAGE_MASK, c0,

arch/mips/lib/r3k_dump_tlb.c

···
 #include <linux/mm.h>
 
 #include <asm/mipsregs.h>
-#include <asm/mmu_context.h>
 #include <asm/page.h>
 #include <asm/pgtable.h>
 #include <asm/tlbdebug.h>
···
 	unsigned int asid;
 	unsigned long entryhi, entrylo0;
 
-	asid = ASID_MASK(read_c0_entryhi());
+	asid = read_c0_entryhi() & 0xfc0;
 
 	for (i = first; i <= last; i++) {
 		write_c0_index(i<<8);
···
 
 		/* Unused entries have a virtual address of KSEG0.  */
 		if ((entryhi & 0xffffe000) != 0x80000000
-		    && (ASID_MASK(entryhi) == asid)) {
+		    && (entryhi & 0xfc0) == asid) {
 			/*
 			 * Only print entries in use
 			 */
···
 			printk("va=%08lx asid=%08lx"
 			       "  [pa=%06lx n=%d d=%d v=%d g=%d]",
 			       (entryhi & 0xffffe000),
-			       ASID_MASK(entryhi),
+			       entryhi & 0xfc0,
 			       entrylo0 & PAGE_MASK,
 			       (entrylo0 & (1 << 11)) ? 1 : 0,
 			       (entrylo0 & (1 << 10)) ? 1 : 0,

arch/mips/mm/tlb-r3k.c

···
 #endif
 
 	local_irq_save(flags);
-	old_ctx = ASID_MASK(read_c0_entryhi());
+	old_ctx = read_c0_entryhi() & ASID_MASK;
 	write_c0_entrylo0(0);
 	entry = r3k_have_wired_reg ? read_c0_wired() : 8;
 	for (; entry < current_cpu_data.tlbsize; entry++) {
···
 
 #ifdef DEBUG_TLB
 		printk("[tlbrange<%lu,0x%08lx,0x%08lx>]",
-			ASID_MASK(cpu_context(cpu, mm)), start, end);
+			cpu_context(cpu, mm) & ASID_MASK, start, end);
 #endif
 		local_irq_save(flags);
 		size = (end - start + (PAGE_SIZE - 1)) >> PAGE_SHIFT;
 		if (size <= current_cpu_data.tlbsize) {
-			int oldpid = ASID_MASK(read_c0_entryhi());
-			int newpid = ASID_MASK(cpu_context(cpu, mm));
+			int oldpid = read_c0_entryhi() & ASID_MASK;
+			int newpid = cpu_context(cpu, mm) & ASID_MASK;
 
 			start &= PAGE_MASK;
 			end += PAGE_SIZE - 1;
···
 #ifdef DEBUG_TLB
 		printk("[tlbpage<%lu,0x%08lx>]", cpu_context(cpu, vma->vm_mm), page);
 #endif
-		newpid = ASID_MASK(cpu_context(cpu, vma->vm_mm));
+		newpid = cpu_context(cpu, vma->vm_mm) & ASID_MASK;
 		page &= PAGE_MASK;
 		local_irq_save(flags);
-		oldpid = ASID_MASK(read_c0_entryhi());
+		oldpid = read_c0_entryhi() & ASID_MASK;
 		write_c0_entryhi(page | newpid);
 		BARRIER;
 		tlb_probe();
···
 	if (current->active_mm != vma->vm_mm)
 		return;
 
-	pid = ASID_MASK(read_c0_entryhi());
+	pid = read_c0_entryhi() & ASID_MASK;
 
 #ifdef DEBUG_TLB
-	if ((pid != ASID_MASK(cpu_context(cpu, vma->vm_mm))) || (cpu_context(cpu, vma->vm_mm) == 0)) {
+	if ((pid != (cpu_context(cpu, vma->vm_mm) & ASID_MASK)) || (cpu_context(cpu, vma->vm_mm) == 0)) {
 		printk("update_mmu_cache: Wheee, bogus tlbpid mmpid=%lu tlbpid=%d\n",
 		       (cpu_context(cpu, vma->vm_mm)), pid);
 	}
···
 
 		local_irq_save(flags);
 		/* Save old context and create impossible VPN2 value */
-		old_ctx = ASID_MASK(read_c0_entryhi());
+		old_ctx = read_c0_entryhi() & ASID_MASK;
 		old_pagemask = read_c0_pagemask();
 		w = read_c0_wired();
 		write_c0_wired(w + 1);
···
 #endif
 
 		local_irq_save(flags);
-		old_ctx = ASID_MASK(read_c0_entryhi());
+		old_ctx = read_c0_entryhi() & ASID_MASK;
 		write_c0_entrylo0(entrylo0);
 		write_c0_entryhi(entryhi);
 		write_c0_index(wired);

arch/mips/mm/tlb-r4k.c

···
 
 	ENTER_CRITICAL(flags);
 
-	pid = ASID_MASK(read_c0_entryhi());
+	pid = read_c0_entryhi() & ASID_MASK;
 	address &= (PAGE_MASK << 1);
 	write_c0_entryhi(address | pid);
 	pgdp = pgd_offset(vma->vm_mm, address);

arch/mips/mm/tlb-r8k.c

···
 	if (current->active_mm != vma->vm_mm)
 		return;
 
-	pid = ASID_MASK(read_c0_entryhi());
+	pid = read_c0_entryhi() & ASID_MASK;
 
 	local_irq_save(flags);
 	address &= PAGE_MASK;

arch/mips/mm/tlbex.c

···
 #include <linux/init.h>
 #include <linux/cache.h>
 
-#include <asm/mmu_context.h>
 #include <asm/cacheflush.h>
 #include <asm/pgtable.h>
 #include <asm/war.h>
···
 #ifdef CONFIG_64BIT
 static int check_for_high_segbits __cpuinitdata;
 #endif
-
-static void __cpuinit insn_fixup(unsigned int **start, unsigned int **stop,
-					unsigned int i_const)
-{
-	unsigned int **p;
-
-	for (p = start; p < stop; p++) {
-#ifndef CONFIG_CPU_MICROMIPS
-		unsigned int *ip;
-
-		ip = *p;
-		*ip = (*ip & 0xffff0000) | i_const;
-#else
-		unsigned short *ip;
-
-		ip = ((unsigned short *)((unsigned int)*p - 1));
-		if ((*ip & 0xf000) == 0x4000) {
-			*ip &= 0xfff1;
-			*ip |= (i_const << 1);
-		} else if ((*ip & 0xf000) == 0x6000) {
-			*ip &= 0xfff1;
-			*ip |= ((i_const >> 2) << 1);
-		} else {
-			ip++;
-			*ip = i_const;
-		}
-#endif
-		local_flush_icache_range((unsigned long)ip,
-					 (unsigned long)ip + sizeof(*ip));
-	}
-}
-
-#define asid_insn_fixup(section, const)					\
-do {									\
-	extern unsigned int *__start_ ## section;			\
-	extern unsigned int *__stop_ ## section;			\
-	insn_fixup(&__start_ ## section, &__stop_ ## section, const);	\
-} while(0)
-
-/*
- * Caller is assumed to flush the caches before the first context switch.
- */
-static void __cpuinit setup_asid(unsigned int inc, unsigned int mask,
-				 unsigned int version_mask,
-				 unsigned int first_version)
-{
-	extern asmlinkage void handle_ri_rdhwr_vivt(void);
-	unsigned long *vivt_exc;
-
-#ifdef CONFIG_CPU_MICROMIPS
-	/*
-	 * Worst case optimised microMIPS addiu instructions support
-	 * only a 3-bit immediate value.
-	 */
-	if(inc > 7)
-		panic("Invalid ASID increment value!");
-#endif
-	asid_insn_fixup(__asid_inc, inc);
-	asid_insn_fixup(__asid_mask, mask);
-	asid_insn_fixup(__asid_version_mask, version_mask);
-	asid_insn_fixup(__asid_first_version, first_version);
-
-	/* Patch up the 'handle_ri_rdhwr_vivt' handler. */
-	vivt_exc = (unsigned long *) &handle_ri_rdhwr_vivt;
-#ifdef CONFIG_CPU_MICROMIPS
-	vivt_exc = (unsigned long *)((unsigned long) vivt_exc - 1);
-#endif
-	vivt_exc++;
-	*vivt_exc = (*vivt_exc & ~mask) | mask;
-
-	current_cpu_data.asid_cache = first_version;
-}
 
 static int check_for_high_segbits __cpuinitdata;
 
···
 	case CPU_TX3922:
 	case CPU_TX3927:
 #ifndef CONFIG_MIPS_PGD_C0_CONTEXT
-		setup_asid(0x40, 0xfc0, 0xf000, ASID_FIRST_VERSION_R3000);
 		if (cpu_has_local_ebase)
 			build_r3000_tlb_refill_handler();
 		if (!run_once) {
···
 		break;
 
 	default:
-#ifndef CONFIG_MIPS_MT_SMTC
-		setup_asid(0x1, 0xff, 0xff00, ASID_FIRST_VERSION_R4000);
-#else
-		setup_asid(0x1, smtc_asid_mask, 0xff00, ASID_FIRST_VERSION_R4000);
-#endif
 		if (!run_once) {
 			scratch_reg = allocate_kscratch();
 #ifdef CONFIG_MIPS_PGD_C0_CONTEXT

arch/mips/pmcs-msp71xx/msp_prom.c

···
 	return 0; /* foo */
 }
 
-static inline int str2eaddr(unsigned char *ea, unsigned char *str)
+int str2eaddr(unsigned char *ea, unsigned char *str)
 {
 	int index = 0;
 	unsigned char num = 0;

arch/mips/ralink/dts/rt3050.dtsi

···
 			reg-shift = <2>;
 		};
 	};
+
+	usb@101c0000 {
+		compatible = "ralink,rt3050-usb", "snps,dwc2";
+		reg = <0x101c0000 40000>;
+
+		interrupt-parent = <&intc>;
+		interrupts = <18>;
+
+		status = "disabled";
+	};
 };

arch/mips/ralink/dts/rt3052_eval.dts

···
 			reg = <0x50000 0x7b0000>;
 		};
 	};
+
+	usb@101c0000 {
+		status = "ok";
+	};
 };

arch/parisc/Kconfig

···
 
 config IRQSTACKS
 	bool "Use separate kernel stacks when processing interrupts"
-	default n
+	default y
 	help
 	  If you say Y here the kernel will use separate kernel stacks
 	  for handling hard and soft interrupts.  This can help avoid

arch/parisc/Makefile

···
 CHECKFLAGS	+= -D__hppa__=1
 LIBGCC		= $(shell $(CC) $(KBUILD_CFLAGS) -print-libgcc-file-name)
 
-MACHINE		:= $(shell uname -m)
-NATIVE		:= $(if $(filter parisc%,$(MACHINE)),1,0)
-
 ifdef CONFIG_64BIT
 UTS_MACHINE	:= parisc64
 CHECKFLAGS	+= -D__LP64__=1 -m64
-WIDTH		:= 64
+CC_ARCHES	= hppa64
 else # 32-bit
-WIDTH		:=
+CC_ARCHES	= hppa hppa2.0 hppa1.1
 endif
 
-# attempt to help out folks who are cross-compiling
-ifeq ($(NATIVE),1)
-CROSS_COMPILE	:= hppa$(WIDTH)-linux-
-else
- ifeq ($(CROSS_COMPILE),)
- CROSS_COMPILE	:= hppa$(WIDTH)-linux-gnu-
- endif
+ifneq ($(SUBARCH),$(UTS_MACHINE))
+	ifeq ($(CROSS_COMPILE),)
+		CC_SUFFIXES = linux linux-gnu unknown-linux-gnu
+		CROSS_COMPILE := $(call cc-cross-prefix, \
+			$(foreach a,$(CC_ARCHES), \
+			$(foreach s,$(CC_SUFFIXES),$(a)-$(s)-)))
+	endif
 endif
 
 OBJCOPY_FLAGS =-O binary -R .note -R .comment -S

arch/parisc/include/asm/hardirq.h

···
 #include <linux/threads.h>
 #include <linux/irq.h>
 
+#ifdef CONFIG_IRQSTACKS
+#define __ARCH_HAS_DO_SOFTIRQ
+#endif
+
 typedef struct {
 	unsigned int __softirq_pending;
 #ifdef CONFIG_DEBUG_STACKOVERFLOW
 	unsigned int kernel_stack_usage;
+#ifdef CONFIG_IRQSTACKS
+	unsigned int irq_stack_usage;
+	unsigned int irq_stack_counter;
+#endif
 #endif
 #ifdef CONFIG_SMP
 	unsigned int irq_resched_count;
···
 #define __ARCH_IRQ_STAT
 #define __IRQ_STAT(cpu, member) (irq_stat[cpu].member)
 #define inc_irq_stat(member)	this_cpu_inc(irq_stat.member)
+#define __inc_irq_stat(member)	__this_cpu_inc(irq_stat.member)
 #define local_softirq_pending()	this_cpu_read(irq_stat.__softirq_pending)
 
 #define __ARCH_SET_SOFTIRQ_PENDING

arch/parisc/include/asm/processor.h

···
  */
 #ifdef __KERNEL__
 
+#include <linux/spinlock_types.h>
+
 #define IRQ_STACK_SIZE      (4096 << 2) /* 16k irq stack size */
 
 union irq_stack_union {
 	unsigned long stack[IRQ_STACK_SIZE/sizeof(unsigned long)];
+	raw_spinlock_t lock;
 };
 
 DECLARE_PER_CPU(union irq_stack_union, irq_stack_union);

arch/parisc/kernel/entry.S

···
 	L2_ptep		\pgd,\pte,\index,\va,\fault
 	.endm
 
+	/* Acquire pa_dbit_lock lock. */
+	.macro		dbit_lock	spc,tmp,tmp1
+#ifdef CONFIG_SMP
+	cmpib,COND(=),n	0,\spc,2f
+	load32		PA(pa_dbit_lock),\tmp
+1:	LDCW		0(\tmp),\tmp1
+	cmpib,COND(=)	0,\tmp1,1b
+	nop
+2:
+#endif
+	.endm
+
+	/* Release pa_dbit_lock lock without reloading lock address. */
+	.macro		dbit_unlock0	spc,tmp
+#ifdef CONFIG_SMP
+	or,COND(=)	%r0,\spc,%r0
+	stw             \spc,0(\tmp)
+#endif
+	.endm
+
+	/* Release pa_dbit_lock lock. */
+	.macro		dbit_unlock1	spc,tmp
+#ifdef CONFIG_SMP
+	load32		PA(pa_dbit_lock),\tmp
+	dbit_unlock0	\spc,\tmp
+#endif
+	.endm
+
 	/* Set the _PAGE_ACCESSED bit of the PTE.  Be clever and
 	 * don't needlessly dirty the cache line if it was already set */
-	.macro		update_ptep	ptep,pte,tmp,tmp1
+	.macro		update_ptep	spc,ptep,pte,tmp,tmp1
+#ifdef CONFIG_SMP
+	or,COND(=)	%r0,\spc,%r0
+	LDREG		0(\ptep),\pte
+#endif
 	ldi		_PAGE_ACCESSED,\tmp1
 	or		\tmp1,\pte,\tmp
 	and,COND(<>)	\tmp1,\pte,%r0
···
 
 	/* Set the dirty bit (and accessed bit).  No need to be
 	 * clever, this is only used from the dirty fault */
-	.macro		update_dirty	ptep,pte,tmp
+	.macro		update_dirty	spc,ptep,pte,tmp
+#ifdef CONFIG_SMP
+	or,COND(=)	%r0,\spc,%r0
+	LDREG		0(\ptep),\pte
+#endif
 	ldi		_PAGE_ACCESSED|_PAGE_DIRTY,\tmp
 	or		\tmp,\pte,\pte
 	STREG		\pte,0(\ptep)
···
 
 	L3_ptep		ptp,pte,t0,va,dtlb_check_alias_20w
 
-	update_ptep	ptp,pte,t0,t1
+	dbit_lock	spc,t0,t1
+	update_ptep	spc,ptp,pte,t0,t1
 
 	make_insert_tlb	spc,pte,prot
 	
 	idtlbt          pte,prot
+	dbit_unlock1	spc,t0
 
 	rfir
 	nop
···
 
 	L3_ptep		ptp,pte,t0,va,nadtlb_check_alias_20w
 
-	update_ptep	ptp,pte,t0,t1
+	dbit_lock	spc,t0,t1
+	update_ptep	spc,ptp,pte,t0,t1
 
 	make_insert_tlb	spc,pte,prot
 
 	idtlbt          pte,prot
+	dbit_unlock1	spc,t0
 
 	rfir
 	nop
···
 
 	L2_ptep		ptp,pte,t0,va,dtlb_check_alias_11
 
-	update_ptep	ptp,pte,t0,t1
+	dbit_lock	spc,t0,t1
+	update_ptep	spc,ptp,pte,t0,t1
 
 	make_insert_tlb_11	spc,pte,prot
 
···
 	idtlbp		prot,(%sr1,va)
 
 	mtsp		t0, %sr1	/* Restore sr1 */
+	dbit_unlock1	spc,t0
 
 	rfir
 	nop
···
 
 	L2_ptep		ptp,pte,t0,va,nadtlb_check_alias_11
 
-	update_ptep	ptp,pte,t0,t1
+	dbit_lock	spc,t0,t1
+	update_ptep	spc,ptp,pte,t0,t1
 
 	make_insert_tlb_11	spc,pte,prot
 
···
 	idtlbp		prot,(%sr1,va)
 
 	mtsp		t0, %sr1	/* Restore sr1 */
+	dbit_unlock1	spc,t0
 
 	rfir
 	nop
···
 
 	L2_ptep		ptp,pte,t0,va,dtlb_check_alias_20
 
-	update_ptep	ptp,pte,t0,t1
+	dbit_lock	spc,t0,t1
+	update_ptep	spc,ptp,pte,t0,t1
 
 	make_insert_tlb	spc,pte,prot
 
 	f_extend	pte,t0
 
 	idtlbt          pte,prot
+	dbit_unlock1	spc,t0
 
 	rfir
 	nop
···
 
 	L2_ptep		ptp,pte,t0,va,nadtlb_check_alias_20
 
-	update_ptep	ptp,pte,t0,t1
+	dbit_lock	spc,t0,t1
+	update_ptep	spc,ptp,pte,t0,t1
 
 	make_insert_tlb	spc,pte,prot
 
 	f_extend	pte,t0
 	
         idtlbt          pte,prot
+	dbit_unlock1	spc,t0
 
 	rfir
 	nop
···
 
 	L3_ptep		ptp,pte,t0,va,itlb_fault
 
-	update_ptep	ptp,pte,t0,t1
+	dbit_lock	spc,t0,t1
+	update_ptep	spc,ptp,pte,t0,t1
 
 	make_insert_tlb	spc,pte,prot
 	
 	iitlbt          pte,prot
+	dbit_unlock1	spc,t0
 
 	rfir
 	nop
···
 
 	L3_ptep		ptp,pte,t0,va,naitlb_check_alias_20w
 
-	update_ptep	ptp,pte,t0,t1
+	dbit_lock	spc,t0,t1
+	update_ptep	spc,ptp,pte,t0,t1
 
 	make_insert_tlb	spc,pte,prot
 
 	iitlbt          pte,prot
+	dbit_unlock1	spc,t0
 
 	rfir
 	nop
···
 
 	L2_ptep		ptp,pte,t0,va,itlb_fault
 
-	update_ptep	ptp,pte,t0,t1
+	dbit_lock	spc,t0,t1
+	update_ptep	spc,ptp,pte,t0,t1
 
 	make_insert_tlb_11	spc,pte,prot
 
···
 	iitlbp		prot,(%sr1,va)
 
 	mtsp		t0, %sr1	/* Restore sr1 */
+	dbit_unlock1	spc,t0
 
 	rfir
 	nop
···
 
 	L2_ptep		ptp,pte,t0,va,naitlb_check_alias_11
 
-	update_ptep	ptp,pte,t0,t1
+	dbit_lock	spc,t0,t1
+	update_ptep	spc,ptp,pte,t0,t1
 
 	make_insert_tlb_11	spc,pte,prot
 
···
 	iitlbp		prot,(%sr1,va)
 
 	mtsp		t0, %sr1	/* Restore sr1 */
+	dbit_unlock1	spc,t0
 
 	rfir
 	nop
···
 
 	L2_ptep		ptp,pte,t0,va,itlb_fault
 
-	update_ptep	ptp,pte,t0,t1
+	dbit_lock	spc,t0,t1
+	update_ptep	spc,ptp,pte,t0,t1
 
 	make_insert_tlb	spc,pte,prot
 
 	f_extend	pte,t0	
 
 	iitlbt          pte,prot
+	dbit_unlock1	spc,t0
 
 	rfir
 	nop
···
 
 	L2_ptep		ptp,pte,t0,va,naitlb_check_alias_20
 
-	update_ptep	ptp,pte,t0,t1
+	dbit_lock	spc,t0,t1
+	update_ptep	spc,ptp,pte,t0,t1
 
 	make_insert_tlb	spc,pte,prot
 
 	f_extend	pte,t0
 
 	iitlbt          pte,prot
+	dbit_unlock1	spc,t0
 
 	rfir
 	nop
···
 
 	L3_ptep		ptp,pte,t0,va,dbit_fault
 
-#ifdef CONFIG_SMP
-	cmpib,COND(=),n        0,spc,dbit_nolock_20w
-	load32		PA(pa_dbit_lock),t0
-
-dbit_spin_20w:
-	LDCW		0(t0),t1
-	cmpib,COND(=)         0,t1,dbit_spin_20w
-	nop
-
-dbit_nolock_20w:
-#endif
-	update_dirty	ptp,pte,t1
+	dbit_lock	spc,t0,t1
+	update_dirty	spc,ptp,pte,t1
 
 	make_insert_tlb	spc,pte,prot
 		
 	idtlbt          pte,prot
-#ifdef CONFIG_SMP
-	cmpib,COND(=),n        0,spc,dbit_nounlock_20w
-	ldi             1,t1
-	stw             t1,0(t0)
-
-dbit_nounlock_20w:
-#endif
+	dbit_unlock0	spc,t0
 
 	rfir
 	nop
···
 
 	L2_ptep		ptp,pte,t0,va,dbit_fault
 
-#ifdef CONFIG_SMP
-	cmpib,COND(=),n        0,spc,dbit_nolock_11
-	load32		PA(pa_dbit_lock),t0
-
-dbit_spin_11:
-	LDCW		0(t0),t1
-	cmpib,=         0,t1,dbit_spin_11
-	nop
-
-dbit_nolock_11:
-#endif
-	update_dirty	ptp,pte,t1
+	dbit_lock	spc,t0,t1
+	update_dirty	spc,ptp,pte,t1
 
 	make_insert_tlb_11	spc,pte,prot
 
···
 	idtlbp		prot,(%sr1,va)
 
 	mtsp            t1, %sr1     /* Restore sr1 */
-#ifdef CONFIG_SMP
-	cmpib,COND(=),n        0,spc,dbit_nounlock_11
-	ldi             1,t1
-	stw             t1,0(t0)
-
-dbit_nounlock_11:
-#endif
+	dbit_unlock0	spc,t0
 
 	rfir
 	nop
···
 
 	L2_ptep		ptp,pte,t0,va,dbit_fault
 
-#ifdef CONFIG_SMP
-	cmpib,COND(=),n        0,spc,dbit_nolock_20
-	load32		PA(pa_dbit_lock),t0
-
-dbit_spin_20:
-	LDCW		0(t0),t1
-	cmpib,=         0,t1,dbit_spin_20
-	nop
-
-dbit_nolock_20:
-#endif
-	update_dirty	ptp,pte,t1
+	dbit_lock	spc,t0,t1
+	update_dirty	spc,ptp,pte,t1
 
 	make_insert_tlb	spc,pte,prot
 
 	f_extend	pte,t1
 	
         idtlbt          pte,prot
-
-#ifdef CONFIG_SMP
-	cmpib,COND(=),n        0,spc,dbit_nounlock_20
-	ldi             1,t1
-	stw             t1,0(t0)
-
-dbit_nounlock_20:
-#endif
+	dbit_unlock0	spc,t0
 
 	rfir
 	nop

arch/parisc/kernel/irq.c

···
 	seq_printf(p, "%*s: ", prec, "STK");
 	for_each_online_cpu(j)
 		seq_printf(p, "%10u ", irq_stats(j)->kernel_stack_usage);
-	seq_printf(p, "  Kernel stack usage\n");
+	seq_puts(p, "  Kernel stack usage\n");
+# ifdef CONFIG_IRQSTACKS
+	seq_printf(p, "%*s: ", prec, "IST");
+	for_each_online_cpu(j)
+		seq_printf(p, "%10u ", irq_stats(j)->irq_stack_usage);
+	seq_puts(p, "  Interrupt stack usage\n");
+	seq_printf(p, "%*s: ", prec, "ISC");
+	for_each_online_cpu(j)
+		seq_printf(p, "%10u ", irq_stats(j)->irq_stack_counter);
+	seq_puts(p, "  Interrupt stack usage counter\n");
+# endif
 #endif
 #ifdef CONFIG_SMP
 	seq_printf(p, "%*s: ", prec, "RES");
 	for_each_online_cpu(j)
 		seq_printf(p, "%10u ", irq_stats(j)->irq_resched_count);
-	seq_printf(p, "  Rescheduling interrupts\n");
+	seq_puts(p, "  Rescheduling interrupts\n");
 	seq_printf(p, "%*s: ", prec, "CAL");
 	for_each_online_cpu(j)
 		seq_printf(p, "%10u ", irq_stats(j)->irq_call_count);
-	seq_printf(p, "  Function call interrupts\n");
+	seq_puts(p, "  Function call interrupts\n");
 #endif
 	seq_printf(p, "%*s: ", prec, "TLB");
 	for_each_online_cpu(j)
 		seq_printf(p, "%10u ", irq_stats(j)->irq_tlb_count);
-	seq_printf(p, "  TLB shootdowns\n");
+	seq_puts(p, "  TLB shootdowns\n");
 	return 0;
 }
 
···
 	unsigned long sp = regs->gr[30];
 	unsigned long stack_usage;
 	unsigned int *last_usage;
+	int cpu = smp_processor_id();
 
 	/* if sr7 != 0, we interrupted a userspace process which we do not want
 	 * to check for stack overflow. We will only check the kernel stack. */
···
 
 	/* calculate kernel stack usage */
 	stack_usage = sp - stack_start;
-	last_usage = &per_cpu(irq_stat.kernel_stack_usage, smp_processor_id());
+#ifdef CONFIG_IRQSTACKS
+	if (likely(stack_usage <= THREAD_SIZE))
+		goto check_kernel_stack; /* found kernel stack */
+
+	/* check irq stack usage */
+	stack_start = (unsigned long) &per_cpu(irq_stack_union, cpu).stack;
+	stack_usage = sp - stack_start;
+
+	last_usage = &per_cpu(irq_stat.irq_stack_usage, cpu);
+	if (unlikely(stack_usage > *last_usage))
+		*last_usage = stack_usage;
+
+	if (likely(stack_usage < (IRQ_STACK_SIZE - STACK_MARGIN)))
+		return;
+
+	pr_emerg("stackcheck: %s will most likely overflow irq stack "
+		 "(sp:%lx, stk bottom-top:%lx-%lx)\n",
+		current->comm, sp, stack_start, stack_start + IRQ_STACK_SIZE);
+	goto panic_check;
+
+check_kernel_stack:
+#endif
+
+	/* check kernel stack usage */
+	last_usage = &per_cpu(irq_stat.kernel_stack_usage, cpu);
 
 	if (unlikely(stack_usage > *last_usage))
 		*last_usage = stack_usage;
···
 		 "(sp:%lx, stk bottom-top:%lx-%lx)\n",
 		current->comm, sp, stack_start, stack_start + THREAD_SIZE);
 
+#ifdef CONFIG_IRQSTACKS
+panic_check:
+#endif
 	if (sysctl_panic_on_stackoverflow)
 		panic("low stack detected by irq handler - check messages\n");
 #endif
 }
 
 #ifdef CONFIG_IRQSTACKS
-DEFINE_PER_CPU(union irq_stack_union, irq_stack_union);
+DEFINE_PER_CPU(union irq_stack_union, irq_stack_union) = {
+		.lock = __RAW_SPIN_LOCK_UNLOCKED((irq_stack_union).lock)
+	};
 
 static void execute_on_irq_stack(void *func, unsigned long param1)
 {
-	unsigned long *irq_stack_start;
+	union irq_stack_union *union_ptr;
 	unsigned long irq_stack;
-	int cpu = smp_processor_id();
+	raw_spinlock_t *irq_stack_in_use;
 
-	irq_stack_start = &per_cpu(irq_stack_union, cpu).stack[0];
-	irq_stack = (unsigned long) irq_stack_start;
-	irq_stack = ALIGN(irq_stack, 16); /* align for stack frame usage */
+	union_ptr = &per_cpu(irq_stack_union, smp_processor_id());
+	irq_stack = (unsigned long) &union_ptr->stack;
+	irq_stack = ALIGN(irq_stack + sizeof(irq_stack_union.lock),
+			 64); /* align for stack frame usage */
 
-	BUG_ON(*irq_stack_start); /* report bug if we were called recursive. */
-	*irq_stack_start = 1;
+	/* We may be called recursive. If we are already using the irq stack,
+	 * just continue to use it. Use spinlocks to serialize
+	 * the irq stack usage.
+	 */
+	irq_stack_in_use = &union_ptr->lock;
+	if (!raw_spin_trylock(irq_stack_in_use)) {
+		void (*direct_call)(unsigned long p1) = func;
+
+		/* We are using the IRQ stack already.
+		 * Do direct call on current stack. */
+		direct_call(param1);
+		return;
+	}
 
 	/* This is where we switch to the IRQ stack. */
 	call_on_stack(param1, func, irq_stack);
 
-	*irq_stack_start = 0;
+	__inc_irq_stat(irq_stack_counter);
+
+	/* free up irq stack usage. */
+	do_raw_spin_unlock(irq_stack_in_use);
+}
+
+asmlinkage void do_softirq(void)
+{
+	__u32 pending;
+	unsigned long flags;
+
+	if (in_interrupt())
+		return;
+
+	local_irq_save(flags);
+
+	pending = local_softirq_pending();
+
+	if (pending)
+		execute_on_irq_stack(__do_softirq, 0);
+
+	local_irq_restore(flags);
 }
 #endif /* CONFIG_IRQSTACKS */
 

arch/parisc/mm/init.c

···
 {
 	int do_recycle;
 
-	inc_irq_stat(irq_tlb_count);
+	__inc_irq_stat(irq_tlb_count);
 	do_recycle = 0;
 	spin_lock(&sid_lock);
 	if (dirty_space_ids > RECYCLE_THRESHOLD) {
···
 #else
 void flush_tlb_all(void)
 {
-	inc_irq_stat(irq_tlb_count);
+	__inc_irq_stat(irq_tlb_count);
 	spin_lock(&sid_lock);
 	flush_tlb_all_local(NULL);
 	recycle_sids();

arch/powerpc/Kconfig.debug

···
 	  Select this to enable early debugging for the PowerNV platform
 	  using an "hvsi" console
 
+config PPC_EARLY_DEBUG_MEMCONS
+	bool "In memory console"
+	help
+	  Select this to enable early debugging using an in memory console.
+	  This console provides input and output buffers stored within the
+	  kernel BSS and should be safe to select on any system. A debugger
+	  can then be used to read kernel output or send input to the console.
 endchoice
+
+config PPC_MEMCONS_OUTPUT_SIZE
+	int "In memory console output buffer size"
+	depends on PPC_EARLY_DEBUG_MEMCONS
+	default 4096
+	help
+	  Selects the size of the output buffer (in bytes) of the in memory
+	  console.
+
+config PPC_MEMCONS_INPUT_SIZE
+	int "In memory console input buffer size"
+	depends on PPC_EARLY_DEBUG_MEMCONS
+	default 128
+	help
+	  Selects the size of the input buffer (in bytes) of the in memory
+	  console.
 
 config PPC_EARLY_DEBUG_OPAL
 	def_bool y

arch/powerpc/include/asm/context_tracking.h

···
+#ifndef _ASM_POWERPC_CONTEXT_TRACKING_H
+#define _ASM_POWERPC_CONTEXT_TRACKING_H
+
+#ifdef CONFIG_CONTEXT_TRACKING
+#define SCHEDULE_USER bl	.schedule_user
+#else
+#define SCHEDULE_USER bl	.schedule
+#endif
+
+#endif

arch/powerpc/include/asm/firmware.h

···
 #define FW_FEATURE_BEST_ENERGY	ASM_CONST(0x0000000080000000)
 #define FW_FEATURE_TYPE1_AFFINITY ASM_CONST(0x0000000100000000)
 #define FW_FEATURE_PRRN		ASM_CONST(0x0000000200000000)
+#define FW_FEATURE_OPALv3	ASM_CONST(0x0000000400000000)
 
 #ifndef __ASSEMBLY__
 
···
 		FW_FEATURE_SET_MODE | FW_FEATURE_BEST_ENERGY |
 		FW_FEATURE_TYPE1_AFFINITY | FW_FEATURE_PRRN,
 	FW_FEATURE_PSERIES_ALWAYS = 0,
-	FW_FEATURE_POWERNV_POSSIBLE = FW_FEATURE_OPAL | FW_FEATURE_OPALv2,
+	FW_FEATURE_POWERNV_POSSIBLE = FW_FEATURE_OPAL | FW_FEATURE_OPALv2 |
+		FW_FEATURE_OPALv3,
 	FW_FEATURE_POWERNV_ALWAYS = 0,
 	FW_FEATURE_PS3_POSSIBLE = FW_FEATURE_LPAR | FW_FEATURE_PS3_LV1,
 	FW_FEATURE_PS3_ALWAYS = FW_FEATURE_LPAR | FW_FEATURE_PS3_LV1,

arch/powerpc/include/asm/hw_irq.h

···
 #endif
 
 #define hard_irq_disable()	do {			\
+	u8 _was_enabled = get_paca()->soft_enabled;	\
 	__hard_irq_disable();				\
-	if (local_paca->soft_enabled)			\
-		trace_hardirqs_off();			\
 	get_paca()->soft_enabled = 0;			\
 	get_paca()->irq_happened |= PACA_IRQ_HARD_DIS;	\
+	if (_was_enabled)				\
+		trace_hardirqs_off();			\
 } while(0)
 
 static inline bool lazy_irq_pending(void)

arch/powerpc/include/asm/opal.h

···
 
 enum OpalThreadStatus {
 	OPAL_THREAD_INACTIVE = 0x0,
-	OPAL_THREAD_STARTED = 0x1
+	OPAL_THREAD_STARTED = 0x1,
+	OPAL_THREAD_UNAVAILABLE = 0x2 /* opal-v3 */
 };
 
 enum OpalPciBusCompare {
···
 extern void opal_nvram_init(void);
 
 extern int opal_machine_check(struct pt_regs *regs);
+
+extern void opal_shutdown(void);
 
 #endif /* __ASSEMBLY__ */
 

arch/powerpc/include/asm/pgalloc-64.h

···
 
 static inline pgtable_t pmd_pgtable(pmd_t pmd)
 {
-	return (pgtable_t)(pmd_val(pmd) & -sizeof(pte_t)*PTRS_PER_PTE);
+	return (pgtable_t)(pmd_val(pmd) & ~PMD_MASKED_BITS);
 }
 
 static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm,

arch/powerpc/include/asm/pte-hash64-64k.h

···
  * generic accessors and iterators here
  */
 #define __real_pte(e,p) 	((real_pte_t) { \
-			(e), ((e) & _PAGE_COMBO) ? \
+			(e), (pte_val(e) & _PAGE_COMBO) ? \
 				(pte_val(*((p) + PTRS_PER_PTE))) : 0 })
 #define __rpte_to_hidx(r,index)	((pte_val((r).pte) & _PAGE_COMBO) ? \
         (((r).hidx >> ((index)<<2)) & 0xf) : ((pte_val((r).pte) >> 12) & 0xf))

arch/powerpc/include/asm/rtas.h

···
 extern void rtas_initialize(void);
 extern int rtas_suspend_cpu(struct rtas_suspend_me_data *data);
 extern int rtas_suspend_last_cpu(struct rtas_suspend_me_data *data);
+extern int rtas_online_cpus_mask(cpumask_var_t cpus);
+extern int rtas_offline_cpus_mask(cpumask_var_t cpus);
 extern int rtas_ibm_suspend_me(struct rtas_args *);
 
 struct rtc_time;

arch/powerpc/include/asm/thread_info.h

···
 #define TIF_PERFMON_CTXSW	6	/* perfmon needs ctxsw calls */
 #define TIF_SYSCALL_AUDIT	7	/* syscall auditing active */
 #define TIF_SINGLESTEP		8	/* singlestepping active */
-#define TIF_MEMDIE		9	/* is terminating due to OOM killer */
+#define TIF_NOHZ		9	/* in adaptive nohz mode */
 #define TIF_SECCOMP		10	/* secure computing */
 #define TIF_RESTOREALL		11	/* Restore all regs (implies NOERROR) */
 #define TIF_NOERROR		12	/* Force successful syscall return */
···
 #define TIF_SYSCALL_TRACEPOINT	15	/* syscall tracepoint instrumentation */
 #define TIF_EMULATE_STACK_STORE	16	/* Is an instruction emulation
 						for stack store? */
+#define TIF_MEMDIE		17	/* is terminating due to OOM killer */
 
 /* as above, but as bit values */
 #define _TIF_SYSCALL_TRACE	(1<<TIF_SYSCALL_TRACE)
···
 #define _TIF_UPROBE		(1<<TIF_UPROBE)
 #define _TIF_SYSCALL_TRACEPOINT	(1<<TIF_SYSCALL_TRACEPOINT)
 #define _TIF_EMULATE_STACK_STORE	(1<<TIF_EMULATE_STACK_STORE)
+#define _TIF_NOHZ		(1<<TIF_NOHZ)
 #define _TIF_SYSCALL_T_OR_A	(_TIF_SYSCALL_TRACE | _TIF_SYSCALL_AUDIT | \
-				 _TIF_SECCOMP | _TIF_SYSCALL_TRACEPOINT)
+				 _TIF_SECCOMP | _TIF_SYSCALL_TRACEPOINT | \
+				 _TIF_NOHZ)
 
 #define _TIF_USER_WORK_MASK	(_TIF_SIGPENDING | _TIF_NEED_RESCHED | \
 				 _TIF_NOTIFY_RESUME | _TIF_UPROBE)

arch/powerpc/include/asm/udbg.h

···
 extern void __init udbg_init_cpm(void);
 extern void __init udbg_init_usbgecko(void);
 extern void __init udbg_init_wsp(void);
+extern void __init udbg_init_memcons(void);
 extern void __init udbg_init_ehv_bc(void);
 extern void __init udbg_init_ps3gelic(void);
 extern void __init udbg_init_debug_opal_raw(void);

arch/powerpc/kernel/entry_32.S

···
 ret_from_kernel_thread:
 	REST_NVGPRS(r1)
 	bl	schedule_tail
-	li	r3,0
-	stw	r3,0(r1)
 	mtlr	r14
 	mr	r3,r15
 	PPC440EP_ERR42

arch/powerpc/kernel/entry_64.S

···
 #include <asm/irqflags.h>
 #include <asm/ftrace.h>
 #include <asm/hw_irq.h>
+#include <asm/context_tracking.h>
 
 /*
  * System calls.
···
 _GLOBAL(ret_from_kernel_thread)
 	bl	.schedule_tail
 	REST_NVGPRS(r1)
-	li	r3,0
-	std	r3,0(r1)
 	ld	r14, 0(r14)
 	mtlr	r14
 	mr	r3,r15
···
 	andi.	r0,r4,_TIF_NEED_RESCHED
 	beq	1f
 	bl	.restore_interrupts
-	bl	.schedule
+	SCHEDULE_USER
 	b	.ret_from_except_lite
 
 1:	bl	.save_nvgprs

arch/powerpc/kernel/exceptions-64e.S

···
 	 */
 
 	mfspr	r14,SPRN_DBSR		/* check single-step/branch taken */
-	andis.	r15,r14,DBSR_IC@h
+	andis.	r15,r14,(DBSR_IC|DBSR_BT)@h
 	beq+	1f
 
 	LOAD_REG_IMMEDIATE(r14,interrupt_base_book3e)
···
 	bge+	cr1,1f
 
 	/* here it looks like we got an inappropriate debug exception. */
-	lis	r14,DBSR_IC@h		/* clear the IC event */
+	lis	r14,(DBSR_IC|DBSR_BT)@h		/* clear the event */
 	rlwinm	r11,r11,0,~MSR_DE	/* clear DE in the CSRR1 value */
 	mtspr	SPRN_DBSR,r14
 	mtspr	SPRN_CSRR1,r11
···
 	 */
 
 	mfspr	r14,SPRN_DBSR		/* check single-step/branch taken */
-	andis.	r15,r14,DBSR_IC@h
+	andis.	r15,r14,(DBSR_IC|DBSR_BT)@h
 	beq+	1f
 
 	LOAD_REG_IMMEDIATE(r14,interrupt_base_book3e)
···
 	bge+	cr1,1f
 
 	/* here it looks like we got an inappropriate debug exception. */
-	lis	r14,DBSR_IC@h		/* clear the IC event */
+	lis	r14,(DBSR_IC|DBSR_BT)@h		/* clear the event */
 	rlwinm	r11,r11,0,~MSR_DE	/* clear DE in the DSRR1 value */
 	mtspr	SPRN_DBSR,r14
 	mtspr	SPRN_DSRR1,r11

arch/powerpc/kernel/machine_kexec_64.c

···
 #include <linux/errno.h>
 #include <linux/kernel.h>
 #include <linux/cpu.h>
+#include <linux/hardirq.h>
 
 #include <asm/page.h>
 #include <asm/current.h>
···
 	pr_debug("kexec: Starting switchover sequence.\n");
 
 	/* switch to a staticly allocated stack.  Based on irq stack code.
+	 * We setup preempt_count to avoid using VMX in memcpy.
 	 * XXX: the task struct will likely be invalid once we do the copy!
 	 */
 	kexec_stack.thread_info.task = current_thread_info()->task;
 	kexec_stack.thread_info.flags = 0;
+	kexec_stack.thread_info.preempt_count = HARDIRQ_OFFSET;
+	kexec_stack.thread_info.cpu = current_thread_info()->cpu;
 
 	/* We need a static PACA, too; copy this CPU's PACA over and switch to
 	 * it.  Also poison per_cpu_offset to catch anyone using non-static

arch/powerpc/kernel/misc_32.S

···
 	li	r3,2
 	blr
 
+_GLOBAL(__bswapdi2)
+	rotlwi  r9,r4,8
+	rotlwi  r10,r3,8
+	rlwimi  r9,r4,24,0,7
+	rlwimi  r10,r3,24,0,7
+	rlwimi  r9,r4,24,16,23
+	rlwimi  r10,r3,24,16,23
+	mr      r3,r9
+	mr      r4,r10
+	blr
+
 _GLOBAL(abs)
 	srawi	r4,r3,31
 	xor	r3,r3,r4

arch/powerpc/kernel/misc_64.S

···
 	isync
 	blr
 
+_GLOBAL(__bswapdi2)
+	srdi	r8,r3,32
+	rlwinm	r7,r3,8,0xffffffff
+	rlwimi	r7,r3,24,0,7
+	rlwinm	r9,r8,8,0xffffffff
+	rlwimi	r7,r3,24,16,23
+	rlwimi	r9,r8,24,0,7
+	rlwimi	r9,r8,24,16,23
+	sldi	r7,r7,32
+	or	r3,r7,r9
+	blr
 
 #if defined(CONFIG_PPC_PMAC) || defined(CONFIG_PPC_MAPLE)
 /*

arch/powerpc/kernel/pci-common.c

···
 				      enum pci_mmap_state mmap_state,
 				      int write_combine)
 {
-	unsigned long prot = pgprot_val(protection);
 
 	/* Write combine is always 0 on non-memory space mappings. On
 	 * memory space, if the user didn't pass 1, we check for a
···
 
 	/* XXX would be nice to have a way to ask for write-through */
 	if (write_combine)
-		return pgprot_noncached_wc(prot);
+		return pgprot_noncached_wc(protection);
 	else
-		return pgprot_noncached(prot);
+		return pgprot_noncached(protection);
 }
 
 /*

arch/powerpc/kernel/ppc_ksyms.c

···
 int __ucmpdi2(unsigned long long, unsigned long long);
 EXPORT_SYMBOL(__ucmpdi2);
 #endif
-
+long long __bswapdi2(long long);
+EXPORT_SYMBOL(__bswapdi2);
 EXPORT_SYMBOL(memcpy);
 EXPORT_SYMBOL(memset);
 EXPORT_SYMBOL(memmove);

arch/powerpc/kernel/process.c

···
 
 static void prime_debug_regs(struct thread_struct *thread)
 {
+	/*
+	 * We could have inherited MSR_DE from userspace, since
+	 * it doesn't get cleared on exception entry.  Make sure
+	 * MSR_DE is clear before we enable any debug events.
+	 */
+	mtmsr(mfmsr() & ~MSR_DE);
+
 	mtspr(SPRN_IAC1, thread->iac1);
 	mtspr(SPRN_IAC2, thread->iac2);
 #if CONFIG_PPC_ADV_DEBUG_IACS > 2
···
 	 * do some house keeping and then return from the fork or clone
 	 * system call, using the stack frame created above.
 	 */
+	((unsigned long *)sp)[0] = 0;
 	sp -= sizeof(struct pt_regs);
 	kregs = (struct pt_regs *) sp;
 	sp -= STACK_FRAME_OVERHEAD;

arch/powerpc/kernel/ptrace.c

···
 #include <trace/syscall.h>
 #include <linux/hw_breakpoint.h>
 #include <linux/perf_event.h>
+#include <linux/context_tracking.h>
 
 #include <asm/uaccess.h>
 #include <asm/page.h>
···
 {
 	long ret = 0;
 
+	user_exit();
+
 	secure_computing_strict(regs->gpr[0]);
 
 	if (test_thread_flag(TIF_SYSCALL_TRACE) &&
···
 	step = test_thread_flag(TIF_SINGLESTEP);
 	if (step || test_thread_flag(TIF_SYSCALL_TRACE))
 		tracehook_report_syscall_exit(regs, step);
+
+	user_enter();
 }

arch/powerpc/kernel/rtas.c

···
 #include <linux/init.h>
 #include <linux/capability.h>
 #include <linux/delay.h>
+#include <linux/cpu.h>
 #include <linux/smp.h>
 #include <linux/completion.h>
 #include <linux/cpumask.h>
···
 	__rtas_suspend_cpu((struct rtas_suspend_me_data *)info, 1);
 }
 
+enum rtas_cpu_state {
+	DOWN,
+	UP,
+};
+
+#ifndef CONFIG_SMP
+static int rtas_cpu_state_change_mask(enum rtas_cpu_state state,
+				cpumask_var_t cpus)
+{
+	if (!cpumask_empty(cpus)) {
+		cpumask_clear(cpus);
+		return -EINVAL;
+	} else
+		return 0;
+}
+#else
+/* On return cpumask will be altered to indicate CPUs changed.
+ * CPUs with states changed will be set in the mask,
+ * CPUs with status unchanged will be unset in the mask. */
+static int rtas_cpu_state_change_mask(enum rtas_cpu_state state,
+				cpumask_var_t cpus)
+{
+	int cpu;
+	int cpuret = 0;
+	int ret = 0;
+
+	if (cpumask_empty(cpus))
+		return 0;
+
+	for_each_cpu(cpu, cpus) {
+		switch (state) {
+		case DOWN:
+			cpuret = cpu_down(cpu);
+			break;
+		case UP:
+			cpuret = cpu_up(cpu);
+			break;
+		}
+		if (cpuret) {
+			pr_debug("%s: cpu_%s for cpu#%d returned %d.\n",
+					__func__,
+					((state == UP) ? "up" : "down"),
+					cpu, cpuret);
+			if (!ret)
+				ret = cpuret;
+			if (state == UP) {
+				/* clear bits for unchanged cpus, return */
+				cpumask_shift_right(cpus, cpus, cpu);
+				cpumask_shift_left(cpus, cpus, cpu);
+				break;
+			} else {
+				/* clear bit for unchanged cpu, continue */
+				cpumask_clear_cpu(cpu, cpus);
+			}
+		}
+	}
+
+	return ret;
+}
+#endif
+
+int rtas_online_cpus_mask(cpumask_var_t cpus)
+{
+	int ret;
+
+	ret = rtas_cpu_state_change_mask(UP, cpus);
+
+	if (ret) {
+		cpumask_var_t tmp_mask;
+
+		if (!alloc_cpumask_var(&tmp_mask, GFP_TEMPORARY))
+			return ret;
+
+		/* Use tmp_mask to preserve cpus mask from first failure */
+		cpumask_copy(tmp_mask, cpus);
+		rtas_offline_cpus_mask(tmp_mask);
+		free_cpumask_var(tmp_mask);
+	}
+
+	return ret;
+}
+EXPORT_SYMBOL(rtas_online_cpus_mask);
+
+int rtas_offline_cpus_mask(cpumask_var_t cpus)
+{
+	return rtas_cpu_state_change_mask(DOWN, cpus);
+}
+EXPORT_SYMBOL(rtas_offline_cpus_mask);
+
 int rtas_ibm_suspend_me(struct rtas_args *args)
 {
 	long state;
···
 	unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
 	struct rtas_suspend_me_data data;
 	DECLARE_COMPLETION_ONSTACK(done);
+	cpumask_var_t offline_mask;
+	int cpuret;
 
 	if (!rtas_service_present("ibm,suspend-me"))
 		return -ENOSYS;
···
 		return 0;
 	}
 
+	if (!alloc_cpumask_var(&offline_mask, GFP_TEMPORARY))
+		return -ENOMEM;
+
 	atomic_set(&data.working, 0);
 	atomic_set(&data.done, 0);
 	atomic_set(&data.error, 0);
 	data.token = rtas_token("ibm,suspend-me");
 	data.complete = &done;
+
+	/* All present CPUs must be online */
+	cpumask_andnot(offline_mask, cpu_present_mask, cpu_online_mask);
+	cpuret = rtas_online_cpus_mask(offline_mask);
+	if (cpuret) {
+		pr_err("%s: Could not bring present CPUs online.\n", __func__);
+		atomic_set(&data.error, cpuret);
+		goto out;
+	}
+
 	stop_topology_update();
 
 	/* Call function on all CPUs.  One of us will make the
···
 
 	start_topology_update();
 
+	/* Take down CPUs not online prior to suspend */
+	cpuret = rtas_offline_cpus_mask(offline_mask);
+	if (cpuret)
+		pr_warn("%s: Could not restore CPUs to offline state.\n",
+				__func__);
+
+out:
+	free_cpumask_var(offline_mask);
 	return atomic_read(&data.error);
 }
 #else /* CONFIG_PPC_PSERIES */

arch/powerpc/kernel/rtas_flash.c

···
 
 /* Array sizes */
 #define VALIDATE_BUF_SIZE 4096    
+#define VALIDATE_MSG_LEN  256
 #define RTAS_MSG_MAXLEN   64
 
 /* Quirk - RTAS requires 4k list length and block size */
···
 }
 
 static int get_validate_flash_msg(struct rtas_validate_flash_t *args_buf, 
-		                   char *msg)
+		                   char *msg, int msglen)
 {
 	int n;
 
···
 		n = sprintf(msg, "%d\n", args_buf->update_results);
 		if ((args_buf->update_results >= VALIDATE_CUR_UNKNOWN) ||
 		    (args_buf->update_results == VALIDATE_TMP_UPDATE))
-			n += sprintf(msg + n, "%s\n", args_buf->buf);
+			n += snprintf(msg + n, msglen - n, "%s\n",
+					args_buf->buf);
 	} else {
 		n = sprintf(msg, "%d\n", args_buf->status);
 	}
···
 {
 	struct rtas_validate_flash_t *const args_buf =
 		&rtas_validate_flash_data;
-	char msg[RTAS_MSG_MAXLEN];
+	char msg[VALIDATE_MSG_LEN];
 	int msglen;
 
 	mutex_lock(&rtas_validate_flash_mutex);
-	msglen = get_validate_flash_msg(args_buf, msg);
+	msglen = get_validate_flash_msg(args_buf, msg, VALIDATE_MSG_LEN);
 	mutex_unlock(&rtas_validate_flash_mutex);
 
 	return simple_read_from_buffer(buf, count, ppos, msg, msglen);

arch/powerpc/kernel/signal.c

···
 #include <linux/signal.h>
 #include <linux/uprobes.h>
 #include <linux/key.h>
+#include <linux/context_tracking.h>
 #include <asm/hw_breakpoint.h>
 #include <asm/uaccess.h>
 #include <asm/unistd.h>
···
  * through debug.exception-trace sysctl.
  */
 
-int show_unhandled_signals = 0;
+int show_unhandled_signals = 1;
 
 /*
  * Allocate space for the signal frame
···
 
 void do_notify_resume(struct pt_regs *regs, unsigned long thread_info_flags)
 {
+	user_exit();
+
 	if (thread_info_flags & _TIF_UPROBE)
 		uprobe_notify_resume(regs);
 
···
 		clear_thread_flag(TIF_NOTIFY_RESUME);
 		tracehook_notify_resume(regs);
 	}
+
+	user_enter();
 }

arch/powerpc/kernel/traps.c

···
 #include <linux/kdebug.h>
 #include <linux/debugfs.h>
 #include <linux/ratelimit.h>
+#include <linux/context_tracking.h>
 
 #include <asm/emulated_ops.h>
 #include <asm/pgtable.h>
···
 
 void machine_check_exception(struct pt_regs *regs)
 {
+	enum ctx_state prev_state = exception_enter();
 	int recover = 0;
 
 	__get_cpu_var(irq_stat).mce_exceptions++;
···
 		recover = cur_cpu_spec->machine_check(regs);
 
 	if (recover > 0)
-		return;
+		goto bail;
 
 #if defined(CONFIG_8xx) && defined(CONFIG_PCI)
 	/* the qspan pci read routines can cause machine checks -- Cort
···
 	 * -- BenH
 	 */
 	bad_page_fault(regs, regs->dar, SIGBUS);
-	return;
+	goto bail;
 #endif
 
 	if (debugger_fault_handler(regs))
-		return;
+		goto bail;
 
 	if (check_io_access(regs))
-		return;
+		goto bail;
 
 	die("Machine check", regs, SIGBUS);
 
 	/* Must die if the interrupt is not recoverable */
 	if (!(regs->msr & MSR_RI))
 		panic("Unrecoverable Machine check");
+
+bail:
+	exception_exit(prev_state);
 }
 
 void SMIException(struct pt_regs *regs)
···
 
 void unknown_exception(struct pt_regs *regs)
 {
+	enum ctx_state prev_state = exception_enter();
+
 	printk("Bad trap at PC: %lx, SR: %lx, vector=%lx\n",
 	       regs->nip, regs->msr, regs->trap);
 
 	_exception(SIGTRAP, regs, 0, 0);
+
+	exception_exit(prev_state);
 }
 
 void instruction_breakpoint_exception(struct pt_regs *regs)
 {
+	enum ctx_state prev_state = exception_enter();
+
 	if (notify_die(DIE_IABR_MATCH, "iabr_match", regs, 5,
 					5, SIGTRAP) == NOTIFY_STOP)
-		return;
+		goto bail;
 	if (debugger_iabr_match(regs))
-		return;
+		goto bail;
 	_exception(SIGTRAP, regs, TRAP_BRKPT, regs->nip);
+
+bail:
+	exception_exit(prev_state);
 }
 
 void RunModeException(struct pt_regs *regs)
···
 
 void __kprobes single_step_exception(struct pt_regs *regs)
 {
+	enum ctx_state prev_state = exception_enter();
+
 	clear_single_step(regs);
 
 	if (notify_die(DIE_SSTEP, "single_step", regs, 5,
 					5, SIGTRAP) == NOTIFY_STOP)
-		return;
+		goto bail;
 	if (debugger_sstep(regs))
-		return;
+		goto bail;
 
 	_exception(SIGTRAP, regs, TRAP_TRACE, regs->nip);
+
+bail:
+	exception_exit(prev_state);
 }
 
 /*
···
 
 void __kprobes program_check_exception(struct pt_regs *regs)
 {
+	enum ctx_state prev_state = exception_enter();
 	unsigned int reason = get_reason(regs);
 	extern int do_mathemu(struct pt_regs *regs);
 
···
 	if (reason & REASON_FP) {
 		/* IEEE FP exception */
 		parse_fpe(regs);
-		return;
+		goto bail;
 	}
 	if (reason & REASON_TRAP) {
 		/* Debugger is first in line to stop recursive faults in
 		 * rcu_lock, notify_die, or atomic_notifier_call_chain */
 		if (debugger_bpt(regs))
-			return;
+			goto bail;
 
 		/* trap exception */
 		if (notify_die(DIE_BPT, "breakpoint", regs, 5, 5, SIGTRAP)
 				== NOTIFY_STOP)
-			return;
+			goto bail;
 
 		if (!(regs->msr & MSR_PR) &&  /* not user-mode */
 		    report_bug(regs->nip, regs) == BUG_TRAP_TYPE_WARN) {
 			regs->nip += 4;
-			return;
+			goto bail;
 		}
 		_exception(SIGTRAP, regs, TRAP_BRKPT, regs->nip);
-		return;
+		goto bail;
 	}
 #ifdef CONFIG_PPC_TRANSACTIONAL_MEM
 	if (reason & REASON_TM) {
···
 		if (!user_mode(regs) &&
 		    report_bug(regs->nip, regs) == BUG_TRAP_TYPE_WARN) {
 			regs->nip += 4;
-			return;
+			goto bail;
 		}
 		/* If usermode caused this, it's done something illegal and
 		 * gets a SIGILL slap on the wrist.  We call it an illegal
···
 		 */
 		if (user_mode(regs)) {
 			_exception(SIGILL, regs, ILL_ILLOPN, regs->nip);
-			return;
+			goto bail;
 		} else {
 			printk(KERN_EMERG "Unexpected TM Bad Thing exception "
 			       "at %lx (msr 0x%x)\n", regs->nip, reason);
···
 	switch (do_mathemu(regs)) {
 	case 0:
 		emulate_single_step(regs);
-		return;
+		goto bail;
 	case 1: {
 			int code = 0;
 			code = __parse_fpscr(current->thread.fpscr.val);
 			_exception(SIGFPE, regs, code, regs->nip);
-			return;
+			goto bail;
 		}
 	case -EFAULT:
 		_exception(SIGSEGV, regs, SEGV_MAPERR, regs->nip);
-		return;
+		goto bail;
 	}
 	/* fall through on any other errors */
 #endif /* CONFIG_MATH_EMULATION */
···
 		case 0:
 			regs->nip += 4;
 			emulate_single_step(regs);
-			return;
+			goto bail;
 		case -EFAULT:
 			_exception(SIGSEGV, regs, SEGV_MAPERR, regs->nip);
-			return;
+			goto bail;
 		}
 	}
 
···
 		_exception(SIGILL, regs, ILL_PRVOPC, regs->nip);
 	else
 		_exception(SIGILL, regs, ILL_ILLOPC, regs->nip);
+
+bail:
+	exception_exit(prev_state);
 }
 
 void alignment_exception(struct pt_regs *regs)
 {
+	enum ctx_state prev_state = exception_enter();
 	int sig, code, fixed = 0;
 
 	/* We restore the interrupt state now */
···
 	if (fixed == 1) {
 		regs->nip += 4;	/* skip over emulated instruction */
 		emulate_single_step(regs);
-		return;
+		goto bail;
 	}
 
 	/* Operand address was bad */
···
 		_exception(sig, regs, code, regs->dar);
 	else
 		bad_page_fault(regs, regs->dar, sig);
+
+bail:
+	exception_exit(prev_state);
 }
 
 void StackOverflow(struct pt_regs *regs)
···
 
 void kernel_fp_unavailable_exception(struct pt_regs *regs)
 {
+	enum ctx_state prev_state = exception_enter();
+
 	printk(KERN_EMERG "Unrecoverable FP Unavailable Exception "
 			  "%lx at %lx\n", regs->trap, regs->nip);
 	die("Unrecoverable FP Unavailable Exception", regs, SIGABRT);
+
+	exception_exit(prev_state);
 }
 
 void altivec_unavailable_exception(struct pt_regs *regs)
 {
+	enum ctx_state prev_state = exception_enter();
+
 	if (user_mode(regs)) {
 		/* A user program has executed an altivec instruction,
 		   but this kernel doesn't support altivec. */
 		_exception(SIGILL, regs, ILL_ILLOPC, regs->nip);
-		return;
+		goto bail;
 	}
 
 	printk(KERN_EMERG "Unrecoverable VMX/Altivec Unavailable Exception "
 			"%lx at %lx\n", regs->trap, regs->nip);
 	die("Unrecoverable VMX/Altivec Unavailable Exception", regs, SIGABRT);
+
+bail:
+	exception_exit(prev_state);
 }
 
 void vsx_unavailable_exception(struct pt_regs *regs)

arch/powerpc/kernel/udbg.c

···
 	udbg_init_usbgecko();
 #elif defined(CONFIG_PPC_EARLY_DEBUG_WSP)
 	udbg_init_wsp();
+#elif defined(CONFIG_PPC_EARLY_DEBUG_MEMCONS)
+	/* In memory console */
+	udbg_init_memcons();
 #elif defined(CONFIG_PPC_EARLY_DEBUG_EHV_BC)
 	udbg_init_ehv_bc();
 #elif defined(CONFIG_PPC_EARLY_DEBUG_PS3GELIC)

arch/powerpc/mm/fault.c

···
 #include <linux/perf_event.h>
 #include <linux/magic.h>
 #include <linux/ratelimit.h>
+#include <linux/context_tracking.h>
 
 #include <asm/firmware.h>
 #include <asm/page.h>
···
 int __kprobes do_page_fault(struct pt_regs *regs, unsigned long address,
 			    unsigned long error_code)
 {
+	enum ctx_state prev_state = exception_enter();
 	struct vm_area_struct * vma;
 	struct mm_struct *mm = current->mm;
 	unsigned int flags = FAULT_FLAG_ALLOW_RETRY | FAULT_FLAG_KILLABLE;
···
 	int trap = TRAP(regs);
  	int is_exec = trap == 0x400;
 	int fault;
+	int rc = 0;
 
 #if !(defined(CONFIG_4xx) || defined(CONFIG_BOOKE))
 	/*
···
 	 * look at it
 	 */
 	if (error_code & ICSWX_DSI_UCT) {
-		int rc = acop_handle_fault(regs, address, error_code);
+		rc = acop_handle_fault(regs, address, error_code);
 		if (rc)
-			return rc;
+			goto bail;
 	}
 #endif /* CONFIG_PPC_ICSWX */
 
 	if (notify_page_fault(regs))
-		return 0;
+		goto bail;
 
 	if (unlikely(debugger_fault_handler(regs)))
-		return 0;
+		goto bail;
 
 	/* On a kernel SLB miss we can only check for a valid exception entry */
-	if (!user_mode(regs) && (address >= TASK_SIZE))
-		return SIGSEGV;
+	if (!user_mode(regs) && (address >= TASK_SIZE)) {
+		rc = SIGSEGV;
+		goto bail;
+	}
 
 #if !(defined(CONFIG_4xx) || defined(CONFIG_BOOKE) || \
 			     defined(CONFIG_PPC_BOOK3S_64))
   	if (error_code & DSISR_DABRMATCH) {
 		/* breakpoint match */
 		do_break(regs, address, error_code);
-		return 0;
+		goto bail;
 	}
 #endif
 
···
 		local_irq_enable();
 
 	if (in_atomic() || mm == NULL) {
-		if (!user_mode(regs))
-			return SIGSEGV;
+		if (!user_mode(regs)) {
+			rc = SIGSEGV;
+			goto bail;
+		}
 		/* in_atomic() in user mode is really bad,
 		   as is current->mm == NULL. */
 		printk(KERN_EMERG "Page fault in user mode with "
···
 	 */
 	fault = handle_mm_fault(mm, vma, address, flags);
 	if (unlikely(fault & (VM_FAULT_RETRY|VM_FAULT_ERROR))) {
-		int rc = mm_fault_error(regs, address, fault);
+		rc = mm_fault_error(regs, address, fault);
 		if (rc >= MM_FAULT_RETURN)
-			return rc;
+			goto bail;
+		else
+			rc = 0;
 	}
 
 	/*
···
 	}
 
 	up_read(&mm->mmap_sem);
-	return 0;
+	goto bail;
 
 bad_area:
 	up_read(&mm->mmap_sem);
···
 	/* User mode accesses cause a SIGSEGV */
 	if (user_mode(regs)) {
 		_exception(SIGSEGV, regs, code, address);
-		return 0;
+		goto bail;
 	}
 
 	if (is_exec && (error_code & DSISR_PROTFAULT))
···
 				   " page (%lx) - exploit attempt? (uid: %d)\n",
 				   address, from_kuid(&init_user_ns, current_uid()));
 
-	return SIGSEGV;
+	rc = SIGSEGV;
+
+bail:
+	exception_exit(prev_state);
+	return rc;
 
 }
 

arch/powerpc/mm/hash_utils_64.c

···
 #include <linux/init.h>
 #include <linux/signal.h>
 #include <linux/memblock.h>
+#include <linux/context_tracking.h>
 
 #include <asm/processor.h>
 #include <asm/pgtable.h>
···
  */
 int hash_page(unsigned long ea, unsigned long access, unsigned long trap)
 {
+	enum ctx_state prev_state = exception_enter();
 	pgd_t *pgdir;
 	unsigned long vsid;
 	struct mm_struct *mm;
···
 		mm = current->mm;
 		if (! mm) {
 			DBG_LOW(" user region with no mm !\n");
-			return 1;
+			rc = 1;
+			goto bail;
 		}
 		psize = get_slice_psize(mm, ea);
 		ssize = user_segment_size(ea);
···
 		/* Not a valid range
 		 * Send the problem up to do_page_fault 
 		 */
-		return 1;
+		rc = 1;
+		goto bail;
 	}
 	DBG_LOW(" mm=%p, mm->pgdir=%p, vsid=%016lx\n", mm, mm->pgd, vsid);
 
 	/* Bad address. */
 	if (!vsid) {
 		DBG_LOW("Bad address!\n");
-		return 1;
+		rc = 1;
+		goto bail;
 	}
 	/* Get pgdir */
 	pgdir = mm->pgd;
-	if (pgdir == NULL)
-		return 1;
+	if (pgdir == NULL) {
+		rc = 1;
+		goto bail;
+	}
 
 	/* Check CPU locality */
 	tmp = cpumask_of(smp_processor_id());
···
 	ptep = find_linux_pte_or_hugepte(pgdir, ea, &hugeshift);
 	if (ptep == NULL || !pte_present(*ptep)) {
 		DBG_LOW(" no PTE !\n");
-		return 1;
+		rc = 1;
+		goto bail;
 	}
 
 	/* Add _PAGE_PRESENT to the required access perm */
···
 	 */
 	if (access & ~pte_val(*ptep)) {
 		DBG_LOW(" no access !\n");
-		return 1;
+		rc = 1;
+		goto bail;
 	}
 
 #ifdef CONFIG_HUGETLB_PAGE
-	if (hugeshift)
-		return __hash_page_huge(ea, access, vsid, ptep, trap, local,
+	if (hugeshift) {
+		rc = __hash_page_huge(ea, access, vsid, ptep, trap, local,
 					ssize, hugeshift, psize);
+		goto bail;
+	}
 #endif /* CONFIG_HUGETLB_PAGE */
 
 #ifndef CONFIG_PPC_64K_PAGES
···
 		pte_val(*(ptep + PTRS_PER_PTE)));
 #endif
 	DBG_LOW(" -> rc=%d\n", rc);
+
+bail:
+	exception_exit(prev_state);
 	return rc;
 }
 EXPORT_SYMBOL_GPL(hash_page);
···
  */
 void low_hash_fault(struct pt_regs *regs, unsigned long address, int rc)
 {
+	enum ctx_state prev_state = exception_enter();
+
 	if (user_mode(regs)) {
 #ifdef CONFIG_PPC_SUBPAGE_PROT
 		if (rc == -2)
···
 			_exception(SIGBUS, regs, BUS_ADRERR, address);
 	} else
 		bad_page_fault(regs, address, SIGBUS);
+
+	exception_exit(prev_state);
 }
 
 long hpte_insert_repeating(unsigned long hash, unsigned long vpn,

arch/powerpc/mm/init_64.c

···
 					     unsigned long phys)
 {
 	int  mapped = htab_bolt_mapping(start, start + page_size, phys,
-					PAGE_KERNEL, mmu_vmemmap_psize,
+					pgprot_val(PAGE_KERNEL),
+					mmu_vmemmap_psize,
 					mmu_kernel_ssize);
 	BUG_ON(mapped < 0);
 }

arch/powerpc/perf/core-book3s.c

···
 #include <linux/perf_event.h>
 #include <linux/percpu.h>
 #include <linux/hardirq.h>
+#include <linux/uaccess.h>
 #include <asm/reg.h>
 #include <asm/pmc.h>
 #include <asm/machdep.h>
 #include <asm/firmware.h>
 #include <asm/ptrace.h>
+#include <asm/code-patching.h>
 
 #define BHRB_MAX_ENTRIES	32
 #define BHRB_TARGET		0x0000000000000002
···
 	return 1;
 }
 
+static inline void power_pmu_bhrb_enable(struct perf_event *event) {}
+static inline void power_pmu_bhrb_disable(struct perf_event *event) {}
+void power_pmu_flush_branch_stack(void) {}
+static inline void power_pmu_bhrb_read(struct cpu_hw_events *cpuhw) {}
 #endif /* CONFIG_PPC32 */
 
 static bool regs_use_siar(struct pt_regs *regs)
···
 		return mmcra & POWER7P_MMCRA_SIAR_VALID;
 
 	return 1;
+}
+
+
+/* Reset all possible BHRB entries */
+static void power_pmu_bhrb_reset(void)
+{
+	asm volatile(PPC_CLRBHRB);
+}
+
+static void power_pmu_bhrb_enable(struct perf_event *event)
+{
+	struct cpu_hw_events *cpuhw = &__get_cpu_var(cpu_hw_events);
+
+	if (!ppmu->bhrb_nr)
+		return;
+
+	/* Clear BHRB if we changed task context to avoid data leaks */
+	if (event->ctx->task && cpuhw->bhrb_context != event->ctx) {
+		power_pmu_bhrb_reset();
+		cpuhw->bhrb_context = event->ctx;
+	}
+	cpuhw->bhrb_users++;
+}
+
+static void power_pmu_bhrb_disable(struct perf_event *event)
+{
+	struct cpu_hw_events *cpuhw = &__get_cpu_var(cpu_hw_events);
+
+	if (!ppmu->bhrb_nr)
+		return;
+
+	cpuhw->bhrb_users--;
+	WARN_ON_ONCE(cpuhw->bhrb_users < 0);
+
+	if (!cpuhw->disabled && !cpuhw->bhrb_users) {
+		/* BHRB cannot be turned off when other
+		 * events are active on the PMU.
+		 */
+
+		/* avoid stale pointer */
+		cpuhw->bhrb_context = NULL;
+	}
+}
+
+/* Called from ctxsw to prevent one process's branch entries to
+ * mingle with the other process's entries during context switch.
+ */
+void power_pmu_flush_branch_stack(void)
+{
+	if (ppmu->bhrb_nr)
+		power_pmu_bhrb_reset();
+}
+/* Calculate the to address for a branch */
+static __u64 power_pmu_bhrb_to(u64 addr)
+{
+	unsigned int instr;
+	int ret;
+	__u64 target;
+
+	if (is_kernel_addr(addr))
+		return branch_target((unsigned int *)addr);
+
+	/* Userspace: need copy instruction here then translate it */
+	pagefault_disable();
+	ret = __get_user_inatomic(instr, (unsigned int __user *)addr);
+	if (ret) {
+		pagefault_enable();
+		return 0;
+	}
+	pagefault_enable();
+
+	target = branch_target(&instr);
+	if ((!target) || (instr & BRANCH_ABSOLUTE))
+		return target;
+
+	/* Translate relative branch target from kernel to user address */
+	return target - (unsigned long)&instr + addr;
+}
+
+/* Processing BHRB entries */
+void power_pmu_bhrb_read(struct cpu_hw_events *cpuhw)
+{
+	u64 val;
+	u64 addr;
+	int r_index, u_index, pred;
+
+	r_index = 0;
+	u_index = 0;
+	while (r_index < ppmu->bhrb_nr) {
+		/* Assembly read function */
+		val = read_bhrb(r_index++);
+		if (!val)
+			/* Terminal marker: End of valid BHRB entries */
+			break;
+		else {
+			addr = val & BHRB_EA;
+			pred = val & BHRB_PREDICTION;
+
+			if (!addr)
+				/* invalid entry */
+				continue;
+
+			/* Branches are read most recent first (ie. mfbhrb 0 is
+			 * the most recent branch).
+			 * There are two types of valid entries:
+			 * 1) a target entry which is the to address of a
+			 *    computed goto like a blr,bctr,btar.  The next
+			 *    entry read from the bhrb will be branch
+			 *    corresponding to this target (ie. the actual
+			 *    blr/bctr/btar instruction).
+			 * 2) a from address which is an actual branch.  If a
+			 *    target entry proceeds this, then this is the
+			 *    matching branch for that target.  If this is not
+			 *    following a target entry, then this is a branch
+			 *    where the target is given as an immediate field
+			 *    in the instruction (ie. an i or b form branch).
+			 *    In this case we need to read the instruction from
+			 *    memory to determine the target/to address.
+			 */
+
+			if (val & BHRB_TARGET) {
+				/* Target branches use two entries
+				 * (ie. computed gotos/XL form)
+				 */
+				cpuhw->bhrb_entries[u_index].to = addr;
+				cpuhw->bhrb_entries[u_index].mispred = pred;
+				cpuhw->bhrb_entries[u_index].predicted = ~pred;
+
+				/* Get from address in next entry */
+				val = read_bhrb(r_index++);
+				addr = val & BHRB_EA;
+				if (val & BHRB_TARGET) {
+					/* Shouldn't have two targets in a
+					   row.. Reset index and try again */
+					r_index--;
+					addr = 0;
+				}
+				cpuhw->bhrb_entries[u_index].from = addr;
+			} else {
+				/* Branches to immediate field 
+				   (ie I or B form) */
+				cpuhw->bhrb_entries[u_index].from = addr;
+				cpuhw->bhrb_entries[u_index].to =
+					power_pmu_bhrb_to(addr);
+				cpuhw->bhrb_entries[u_index].mispred = pred;
+				cpuhw->bhrb_entries[u_index].predicted = ~pred;
+			}
+			u_index++;
+
+		}
+	}
+	cpuhw->bhrb_stack.nr = u_index;
+	return;
 }
 
 #endif /* CONFIG_PPC64 */
···
 	return n;
 }
 
-/* Reset all possible BHRB entries */
-static void power_pmu_bhrb_reset(void)
-{
-	asm volatile(PPC_CLRBHRB);
-}
-
-void power_pmu_bhrb_enable(struct perf_event *event)
-{
-	struct cpu_hw_events *cpuhw = &__get_cpu_var(cpu_hw_events);
-
-	if (!ppmu->bhrb_nr)
-		return;
-
-	/* Clear BHRB if we changed task context to avoid data leaks */
-	if (event->ctx->task && cpuhw->bhrb_context != event->ctx) {
-		power_pmu_bhrb_reset();
-		cpuhw->bhrb_context = event->ctx;
-	}
-	cpuhw->bhrb_users++;
-}
-
-void power_pmu_bhrb_disable(struct perf_event *event)
-{
-	struct cpu_hw_events *cpuhw = &__get_cpu_var(cpu_hw_events);
-
-	if (!ppmu->bhrb_nr)
-		return;
-
-	cpuhw->bhrb_users--;
-	WARN_ON_ONCE(cpuhw->bhrb_users < 0);
-
-	if (!cpuhw->disabled && !cpuhw->bhrb_users) {
-		/* BHRB cannot be turned off when other
-		 * events are active on the PMU.
-		 */
-
-		/* avoid stale pointer */
-		cpuhw->bhrb_context = NULL;
-	}
-}
-
 /*
  * Add a event to the PMU.
  * If all events are not already frozen, then we disable and
···
 	cpuhw->group_flag &= ~PERF_EVENT_TXN;
 	perf_pmu_enable(pmu);
 	return 0;
-}
-
-/* Called from ctxsw to prevent one process's branch entries to
- * mingle with the other process's entries during context switch.
- */
-void power_pmu_flush_branch_stack(void)
-{
-	if (ppmu->bhrb_nr)
-		power_pmu_bhrb_reset();
 }
 
 /*
···
 	.event_idx	= power_pmu_event_idx,
 	.flush_branch_stack = power_pmu_flush_branch_stack,
 };
-
-/* Processing BHRB entries */
-void power_pmu_bhrb_read(struct cpu_hw_events *cpuhw)
-{
-	u64 val;
-	u64 addr;
-	int r_index, u_index, target, pred;
-
-	r_index = 0;
-	u_index = 0;
-	while (r_index < ppmu->bhrb_nr) {
-		/* Assembly read function */
-		val = read_bhrb(r_index);
-
-		/* Terminal marker: End of valid BHRB entries */
-		if (val == 0) {
-			break;
-		} else {
-			/* BHRB field break up */
-			addr = val & BHRB_EA;
-			pred = val & BHRB_PREDICTION;
-			target = val & BHRB_TARGET;
-
-			/* Probable Missed entry: Not applicable for POWER8 */
-			if ((addr == 0) && (target == 0) && (pred == 1)) {
-				r_index++;
-				continue;
-			}
-
-			/* Real Missed entry: Power8 based missed entry */
-			if ((addr == 0) && (target == 1) && (pred == 1)) {
-				r_index++;
-				continue;
-			}
-
-			/* Reserved condition: Not a valid entry  */
-			if ((addr == 0) && (target == 1) && (pred == 0)) {
-				r_index++;
-				continue;
-			}
-
-			/* Is a target address */
-			if (val & BHRB_TARGET) {
-				/* First address cannot be a target address */
-				if (r_index == 0) {
-					r_index++;
-					continue;
-				}
-
-				/* Update target address for the previous entry */
-				cpuhw->bhrb_entries[u_index - 1].to = addr;
-				cpuhw->bhrb_entries[u_index - 1].mispred = pred;
-				cpuhw->bhrb_entries[u_index - 1].predicted = ~pred;
-
-				/* Dont increment u_index */
-				r_index++;
-			} else {
-				/* Update address, flags for current entry */
-				cpuhw->bhrb_entries[u_index].from = addr;
-				cpuhw->bhrb_entries[u_index].mispred = pred;
-				cpuhw->bhrb_entries[u_index].predicted = ~pred;
-
-				/* Successfully popullated one entry */
-				u_index++;
-				r_index++;
-			}
-		}
-	}
-	cpuhw->bhrb_stack.nr = u_index;
-	return;
-}
 
 /*
  * A counter has overflowed; update its count and record

arch/powerpc/platforms/Kconfig

···
 
 config RTAS_PROC
 	bool "Proc interface to RTAS"
-	depends on PPC_RTAS
+	depends on PPC_RTAS && PROC_FS
 	default y
 
 config RTAS_FLASH

arch/powerpc/platforms/powernv/opal.c

···
 #include <linux/of.h>
 #include <linux/of_platform.h>
 #include <linux/interrupt.h>
+#include <linux/slab.h>
 #include <asm/opal.h>
 #include <asm/firmware.h>
 
···
 static struct device_node *opal_node;
 static DEFINE_SPINLOCK(opal_write_lock);
 extern u64 opal_mc_secondary_handler[];
+static unsigned int *opal_irqs;
+static unsigned int opal_irq_count;
 
 int __init early_init_dt_scan_opal(unsigned long node,
 				   const char *uname, int depth, void *data)
···
 		 opal.entry, entryp, entrysz);
 
 	powerpc_firmware_features |= FW_FEATURE_OPAL;
-	if (of_flat_dt_is_compatible(node, "ibm,opal-v2")) {
+	if (of_flat_dt_is_compatible(node, "ibm,opal-v3")) {
+		powerpc_firmware_features |= FW_FEATURE_OPALv2;
+		powerpc_firmware_features |= FW_FEATURE_OPALv3;
+		printk("OPAL V3 detected !\n");
+	} else if (of_flat_dt_is_compatible(node, "ibm,opal-v2")) {
 		powerpc_firmware_features |= FW_FEATURE_OPALv2;
 		printk("OPAL V2 detected !\n");
 	} else {
···
 				rc == OPAL_BUSY_EVENT || rc == OPAL_SUCCESS)) {
 		len = total_len;
 		rc = opal_console_write(vtermno, &len, data);
+
+		/* Closed or other error drop */
+		if (rc != OPAL_SUCCESS && rc != OPAL_BUSY &&
+		    rc != OPAL_BUSY_EVENT) {
+			written = total_len;
+			break;
+		}
 		if (rc == OPAL_SUCCESS) {
 			total_len -= len;
 			data += len;
···
 	irqs = of_get_property(opal_node, "opal-interrupts", &irqlen);
 	pr_debug("opal: Found %d interrupts reserved for OPAL\n",
 		 irqs ? (irqlen / 4) : 0);
+	opal_irq_count = irqlen / 4;
+	opal_irqs = kzalloc(opal_irq_count * sizeof(unsigned int), GFP_KERNEL);
 	for (i = 0; irqs && i < (irqlen / 4); i++, irqs++) {
 		unsigned int hwirq = be32_to_cpup(irqs);
 		unsigned int irq = irq_create_mapping(NULL, hwirq);
···
 		if (rc)
 			pr_warning("opal: Error %d requesting irq %d"
 				   " (0x%x)\n", rc, irq, hwirq);
+		opal_irqs[i] = irq;
 	}
 	return 0;
 }
 subsys_initcall(opal_init);
+
+void opal_shutdown(void)
+{
+	unsigned int i;
+
+	for (i = 0; i < opal_irq_count; i++) {
+		if (opal_irqs[i])
+			free_irq(opal_irqs[i], 0);
+		opal_irqs[i] = 0;
+	}
+}

arch/powerpc/platforms/powernv/pci-ioda.c

···
 	return phb->ioda.pe_rmap[(bus->number << 8) | devfn];
 }
 
+static void pnv_pci_ioda_shutdown(struct pnv_phb *phb)
+{
+	opal_pci_reset(phb->opal_id, OPAL_PCI_IODA_TABLE_RESET,
+		       OPAL_ASSERT_RESET);
+}
+
 void __init pnv_pci_init_ioda_phb(struct device_node *np, int ioda_type)
 {
 	struct pci_controller *hose;
···
 
 	/* Setup TCEs */
 	phb->dma_dev_setup = pnv_pci_ioda_dma_dev_setup;
+
+	/* Setup shutdown function for kexec */
+	phb->shutdown = pnv_pci_ioda_shutdown;
 
 	/* Setup MSI support */
 	pnv_pci_init_ioda_msis(phb);

arch/powerpc/platforms/powernv/pci.c

···
 		pnv_pci_dma_fallback_setup(hose, pdev);
 }
 
+void pnv_pci_shutdown(void)
+{
+	struct pci_controller *hose;
+
+	list_for_each_entry(hose, &hose_list, list_node) {
+		struct pnv_phb *phb = hose->private_data;
+
+		if (phb && phb->shutdown)
+			phb->shutdown(phb);
+	}
+}
+
 /* Fixup wrong class code in p7ioc and p8 root complex */
 static void pnv_p7ioc_rc_quirk(struct pci_dev *dev)
 {

arch/powerpc/platforms/powernv/pci.h

···
 	void (*dma_dev_setup)(struct pnv_phb *phb, struct pci_dev *pdev);
 	void (*fixup_phb)(struct pci_controller *hose);
 	u32 (*bdfn_to_pe)(struct pnv_phb *phb, struct pci_bus *bus, u32 devfn);
+	void (*shutdown)(struct pnv_phb *phb);
 
 	union {
 		struct {
···
 extern void pnv_pci_init_ioda2_phb(struct device_node *np);
 extern void pnv_pci_ioda_tce_invalidate(struct iommu_table *tbl,
 					u64 *startp, u64 *endp);
+
 #endif /* __POWERNV_PCI_H */

arch/powerpc/platforms/powernv/powernv.h

···
 
 #ifdef CONFIG_PCI
 extern void pnv_pci_init(void);
+extern void pnv_pci_shutdown(void);
 #else
 static inline void pnv_pci_init(void) { }
+static inline void pnv_pci_shutdown(void) { }
 #endif
 
 #endif /* _POWERNV_H */

arch/powerpc/platforms/powernv/setup.c

···
 	if (root)
 		model = of_get_property(root, "model", NULL);
 	seq_printf(m, "machine\t\t: PowerNV %s\n", model);
-	if (firmware_has_feature(FW_FEATURE_OPALv2))
+	if (firmware_has_feature(FW_FEATURE_OPALv3))
+		seq_printf(m, "firmware\t: OPAL v3\n");
+	else if (firmware_has_feature(FW_FEATURE_OPALv2))
 		seq_printf(m, "firmware\t: OPAL v2\n");
 	else if (firmware_has_feature(FW_FEATURE_OPAL))
 		seq_printf(m, "firmware\t: OPAL v1\n");
···
 
 static void pnv_progress(char *s, unsigned short hex)
 {
+}
+
+static void pnv_shutdown(void)
+{
+	/* Let the PCI code clear up IODA tables */
+	pnv_pci_shutdown();
+
+	/* And unregister all OPAL interrupts so they don't fire
+	 * up while we kexec
+	 */
+	opal_shutdown();
 }
 
 #ifdef CONFIG_KEXEC
···
 	.init_IRQ		= pnv_init_IRQ,
 	.show_cpuinfo		= pnv_show_cpuinfo,
 	.progress		= pnv_progress,
+	.machine_shutdown	= pnv_shutdown,
 	.power_save             = power7_idle,
 	.calibrate_decr		= generic_calibrate_decr,
 #ifdef CONFIG_KEXEC

arch/powerpc/platforms/powernv/smp.c

···
 
 	BUG_ON(nr < 0 || nr >= NR_CPUS);
 
-	/* On OPAL v2 the CPU are still spinning inside OPAL itself,
-	 * get them back now
+	/*
+	 * If we already started or OPALv2 is not supported, we just
+	 * kick the CPU via the PACA
 	 */
-	if (!paca[nr].cpu_start && firmware_has_feature(FW_FEATURE_OPALv2)) {
-		pr_devel("OPAL: Starting CPU %d (HW 0x%x)...\n", nr, pcpu);
-		rc = opal_start_cpu(pcpu, start_here);
+	if (paca[nr].cpu_start || !firmware_has_feature(FW_FEATURE_OPALv2))
+		goto kick;
+
+	/*
+	 * At this point, the CPU can either be spinning on the way in
+	 * from kexec or be inside OPAL waiting to be started for the
+	 * first time. OPAL v3 allows us to query OPAL to know if it
+	 * has the CPUs, so we do that
+	 */
+	if (firmware_has_feature(FW_FEATURE_OPALv3)) {
+		uint8_t status;
+
+		rc = opal_query_cpu_status(pcpu, &status);
 		if (rc != OPAL_SUCCESS) {
-			pr_warn("OPAL Error %ld starting CPU %d\n",
+			pr_warn("OPAL Error %ld querying CPU %d state\n",
 				rc, nr);
 			return -ENODEV;
 		}
+
+		/*
+		 * Already started, just kick it, probably coming from
+		 * kexec and spinning
+		 */
+		if (status == OPAL_THREAD_STARTED)
+			goto kick;
+
+		/*
+		 * Available/inactive, let's kick it
+		 */
+		if (status == OPAL_THREAD_INACTIVE) {
+			pr_devel("OPAL: Starting CPU %d (HW 0x%x)...\n",
+				 nr, pcpu);
+			rc = opal_start_cpu(pcpu, start_here);
+			if (rc != OPAL_SUCCESS) {
+				pr_warn("OPAL Error %ld starting CPU %d\n",
+					rc, nr);
+				return -ENODEV;
+			}
+		} else {
+			/*
+			 * An unavailable CPU (or any other unknown status)
+			 * shouldn't be started. It should also
+			 * not be in the possible map but currently it can
+			 * happen
+			 */
+			pr_devel("OPAL: CPU %d (HW 0x%x) is unavailable"
+				 " (status %d)...\n", nr, pcpu, status);
+			return -ENODEV;
+		}
+	} else {
+		/*
+		 * On OPAL v2, we just kick it and hope for the best,
+		 * we must not test the error from opal_start_cpu() or
+		 * we would fail to get CPUs from kexec.
+		 */
+		opal_start_cpu(pcpu, start_here);
 	}
+ kick:
 	return smp_generic_kick_cpu(nr);
 }
 

arch/powerpc/platforms/pseries/Kconfig

···
 	select PPC_PCI_CHOICE if EXPERT
 	select ZLIB_DEFLATE
 	select PPC_DOORBELL
+	select HAVE_CONTEXT_TRACKING
 	default y
 
 config PPC_SPLPAR

arch/powerpc/platforms/pseries/suspend.c

···
   * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
   */
 
+#include <linux/cpu.h>
 #include <linux/delay.h>
 #include <linux/suspend.h>
 #include <linux/stat.h>
···
 			       struct device_attribute *attr,
 			       const char *buf, size_t count)
 {
+	cpumask_var_t offline_mask;
 	int rc;
 
 	if (!capable(CAP_SYS_ADMIN))
 		return -EPERM;
+
+	if (!alloc_cpumask_var(&offline_mask, GFP_TEMPORARY))
+		return -ENOMEM;
 
 	stream_id = simple_strtoul(buf, NULL, 16);
 
···
 	} while (rc == -EAGAIN);
 
 	if (!rc) {
+		/* All present CPUs must be online */
+		cpumask_andnot(offline_mask, cpu_present_mask,
+				cpu_online_mask);
+		rc = rtas_online_cpus_mask(offline_mask);
+		if (rc) {
+			pr_err("%s: Could not bring present CPUs online.\n",
+					__func__);
+			goto out;
+		}
+
 		stop_topology_update();
 		rc = pm_suspend(PM_SUSPEND_MEM);
 		start_topology_update();
+
+		/* Take down CPUs not online prior to suspend */
+		if (!rtas_offline_cpus_mask(offline_mask))
+			pr_warn("%s: Could not restore CPUs to offline "
+					"state.\n", __func__);
 	}
 
 	stream_id = 0;
 
 	if (!rc)
 		rc = count;
+out:
+	free_cpumask_var(offline_mask);
 	return rc;
 }
 

arch/powerpc/platforms/wsp/ics.c

···
 	xive = xive_set_server(xive, get_irq_server(ics, hw_irq));
 	wsp_ics_set_xive(ics, hw_irq, xive);
 
-	return 0;
+	return IRQ_SET_MASK_OK;
 }
 
 static struct irq_chip wsp_irq_chip = {

arch/powerpc/sysdev/Makefile

···
 
 obj-$(CONFIG_PPC_SCOM)		+= scom.o
 
+obj-$(CONFIG_PPC_EARLY_DEBUG_MEMCONS)	+= udbg_memcons.o
+
 subdir-ccflags-$(CONFIG_PPC_WERROR) := -Werror
 
 obj-$(CONFIG_PPC_XICS)		+= xics/

arch/powerpc/sysdev/ehv_pic.c

···
 	ev_int_set_config(src, config, prio, cpuid);
 	spin_unlock_irqrestore(&ehv_pic_lock, flags);
 
-	return 0;
+	return IRQ_SET_MASK_OK;
 }
 
 static unsigned int ehv_pic_type_to_vecpri(unsigned int type)

arch/powerpc/sysdev/mpic.c

···
 			       mpic_physmask(mask));
 	}
 
-	return 0;
+	return IRQ_SET_MASK_OK;
 }
 
 static unsigned int mpic_type_to_vecpri(struct mpic *mpic, unsigned int type)

arch/powerpc/sysdev/udbg_memcons.c

···
+/*
+ * A udbg backend which logs messages and reads input from in memory
+ * buffers.
+ *
+ * The console output can be read from memcons_output which is a
+ * circular buffer whose next write position is stored in memcons.output_pos.
+ *
+ * Input may be passed by writing into the memcons_input buffer when it is
+ * empty. The input buffer is empty when both input_pos == input_start and
+ * *input_start == '\0'.
+ *
+ * Copyright (C) 2003-2005 Anton Blanchard and Milton Miller, IBM Corp
+ * Copyright (C) 2013 Alistair Popple, IBM Corp
+ *
+ *      This program is free software; you can redistribute it and/or
+ *      modify it under the terms of the GNU General Public License
+ *      as published by the Free Software Foundation; either version
+ *      2 of the License, or (at your option) any later version.
+ */
+
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <asm/barrier.h>
+#include <asm/page.h>
+#include <asm/processor.h>
+#include <asm/udbg.h>
+
+struct memcons {
+	char *output_start;
+	char *output_pos;
+	char *output_end;
+	char *input_start;
+	char *input_pos;
+	char *input_end;
+};
+
+static char memcons_output[CONFIG_PPC_MEMCONS_OUTPUT_SIZE];
+static char memcons_input[CONFIG_PPC_MEMCONS_INPUT_SIZE];
+
+struct memcons memcons = {
+	.output_start = memcons_output,
+	.output_pos = memcons_output,
+	.output_end = &memcons_output[CONFIG_PPC_MEMCONS_OUTPUT_SIZE],
+	.input_start = memcons_input,
+	.input_pos = memcons_input,
+	.input_end = &memcons_input[CONFIG_PPC_MEMCONS_INPUT_SIZE],
+};
+
+void memcons_putc(char c)
+{
+	char *new_output_pos;
+
+	*memcons.output_pos = c;
+	wmb();
+	new_output_pos = memcons.output_pos + 1;
+	if (new_output_pos >= memcons.output_end)
+		new_output_pos = memcons.output_start;
+
+	memcons.output_pos = new_output_pos;
+}
+
+int memcons_getc_poll(void)
+{
+	char c;
+	char *new_input_pos;
+
+	if (*memcons.input_pos) {
+		c = *memcons.input_pos;
+
+		new_input_pos = memcons.input_pos + 1;
+		if (new_input_pos >= memcons.input_end)
+			new_input_pos = memcons.input_start;
+		else if (*new_input_pos == '\0')
+			new_input_pos = memcons.input_start;
+
+		*memcons.input_pos = '\0';
+		wmb();
+		memcons.input_pos = new_input_pos;
+		return c;
+	}
+
+	return -1;
+}
+
+int memcons_getc(void)
+{
+	int c;
+
+	while (1) {
+		c = memcons_getc_poll();
+		if (c == -1)
+			cpu_relax();
+		else
+			break;
+	}
+
+	return c;
+}
+
+void udbg_init_memcons(void)
+{
+	udbg_putc = memcons_putc;
+	udbg_getc = memcons_getc;
+	udbg_getc_poll = memcons_getc_poll;
+}

arch/powerpc/sysdev/xics/ics-opal.c

···
 		       __func__, d->irq, hw_irq, server, rc);
 		return -1;
 	}
-	return 0;
+	return IRQ_SET_MASK_OK;
 }
 
 static struct irq_chip ics_opal_irq_chip = {

arch/x86/Kconfig

···
 	select GENERIC_CLOCKEVENTS_BROADCAST if X86_64 || (X86_32 && X86_LOCAL_APIC)
 	select GENERIC_TIME_VSYSCALL if X86_64
 	select KTIME_SCALAR if X86_32
-	select ALWAYS_USE_PERSISTENT_CLOCK
 	select GENERIC_STRNCPY_FROM_USER
 	select GENERIC_STRNLEN_USER
 	select HAVE_CONTEXT_TRACKING if X86_64

arch/x86/kernel/head64.c

···
 extern pgd_t early_level4_pgt[PTRS_PER_PGD];
 extern pmd_t early_dynamic_pgts[EARLY_DYNAMIC_PAGE_TABLES][PTRS_PER_PMD];
 static unsigned int __initdata next_early_pgt = 2;
-pmdval_t __initdata early_pmd_flags = __PAGE_KERNEL_LARGE & ~(_PAGE_GLOBAL | _PAGE_NX);
+pmdval_t early_pmd_flags = __PAGE_KERNEL_LARGE & ~(_PAGE_GLOBAL | _PAGE_NX);
 
 /* Wipe all early page tables except for the kernel symbol map */
 static void __init reset_early_page_tables(void)

arch/x86/kernel/microcode_intel_early.c

···
 #endif
 
 #if defined(CONFIG_MICROCODE_INTEL_EARLY) && defined(CONFIG_HOTPLUG_CPU)
+static DEFINE_MUTEX(x86_cpu_microcode_mutex);
 /*
  * Save this mc into mc_saved_data. So it will be loaded early when a CPU is
  * hot added or resumes.
···
 	 * Hold hotplug lock so mc_saved_data is not accessed by a CPU in
 	 * hotplug.
 	 */
-	cpu_hotplug_driver_lock();
+	mutex_lock(&x86_cpu_microcode_mutex);
 
 	mc_saved_count_init = mc_saved_data.mc_saved_count;
 	mc_saved_count = mc_saved_data.mc_saved_count;
···
 	}
 
 out:
-	cpu_hotplug_driver_unlock();
+	mutex_unlock(&x86_cpu_microcode_mutex);
 
 	return ret;
 }

arch/x86/kernel/process.c

···
 {
 	if (cpuidle_idle_call())
 		x86_idle();
+	else
+		local_irq_enable();
 }
 
 /*
···
  */
 static void amd_e400_idle(void)
 {
-	if (need_resched())
-		return;
-
 	if (!amd_e400_c1e_detected) {
 		u32 lo, hi;
 

arch/x86/mm/init.c

···
 }
 
 /*
- * would have hole in the middle or ends, and only ram parts will be mapped.
+ * We need to iterate through the E820 memory map and create direct mappings
+ * for only E820_RAM and E820_KERN_RESERVED regions. We cannot simply
+ * create direct mappings for all pfns from [0 to max_low_pfn) and
+ * [4GB to max_pfn) because of possible memory holes in high addresses
+ * that cannot be marked as UC by fixed/variable range MTRRs.
+ * Depending on the alignment of E820 ranges, this may possibly result
+ * in using smaller size (i.e. 4K instead of 2M or 1G) page tables.
+ *
+ * init_mem_mapping() calls init_range_memory_mapping() with big range.
+ * That range would have hole in the middle or ends, and only ram parts
+ * will be mapped in init_range_memory_mapping().
  */
 static unsigned long __init init_range_memory_mapping(
 					   unsigned long r_start,
···
 	max_pfn_mapped = 0; /* will get exact value next */
 	min_pfn_mapped = real_end >> PAGE_SHIFT;
 	last_start = start = real_end;
+
+	/*
+	 * We start from the top (end of memory) and go to the bottom.
+	 * The memblock_find_in_range() gets us a block of RAM from the
+	 * end of RAM in [min_pfn_mapped, max_pfn_mapped) used as new pages
+	 * for page table.
+	 */
 	while (last_start > ISA_END_ADDRESS) {
 		if (last_start > step_size) {
 			start = round_down(last_start - 1, step_size);

drivers/acpi/ac.c

···
 #include <linux/slab.h>
 #include <linux/init.h>
 #include <linux/types.h>
+#include <linux/dmi.h>
+#include <linux/delay.h>
 #ifdef CONFIG_ACPI_PROCFS_POWER
 #include <linux/proc_fs.h>
 #include <linux/seq_file.h>
···
 static int acpi_ac_resume(struct device *dev);
 #endif
 static SIMPLE_DEV_PM_OPS(acpi_ac_pm, NULL, acpi_ac_resume);
+
+static int ac_sleep_before_get_state_ms;
 
 static struct acpi_driver acpi_ac_driver = {
 	.name = "ac",
···
 	case ACPI_AC_NOTIFY_STATUS:
 	case ACPI_NOTIFY_BUS_CHECK:
 	case ACPI_NOTIFY_DEVICE_CHECK:
+		/*
+		 * A buggy BIOS may notify AC first and then sleep for
+		 * a specific time before doing actual operations in the
+		 * EC event handler (_Qxx). This will cause the AC state
+		 * reported by the ACPI event to be incorrect, so wait for a
+		 * specific time for the EC event handler to make progress.
+		 */
+		if (ac_sleep_before_get_state_ms > 0)
+			msleep(ac_sleep_before_get_state_ms);
+
 		acpi_ac_get_state(ac);
 		acpi_bus_generate_proc_event(device, event, (u32) ac->state);
 		acpi_bus_generate_netlink_event(device->pnp.device_class,
···
 
 	return;
 }
+
+static int thinkpad_e530_quirk(const struct dmi_system_id *d)
+{
+	ac_sleep_before_get_state_ms = 1000;
+	return 0;
+}
+
+static struct dmi_system_id ac_dmi_table[] = {
+	{
+	.callback = thinkpad_e530_quirk,
+	.ident = "thinkpad e530",
+	.matches = {
+		DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
+		DMI_MATCH(DMI_PRODUCT_NAME, "32597CG"),
+		},
+	},
+	{},
+};
 
 static int acpi_ac_add(struct acpi_device *device)
 {
···
 		kfree(ac);
 	}
 
+	dmi_check_system(ac_dmi_table);
 	return result;
 }
 

drivers/acpi/ec.c

···
 static int ec_poll(struct acpi_ec *ec)
 {
 	unsigned long flags;
-	int repeat = 2; /* number of command restarts */
+	int repeat = 5; /* number of command restarts */
 	while (repeat--) {
 		unsigned long delay = jiffies +
 			msecs_to_jiffies(ec_delay);
···
 			}
 			advance_transaction(ec, acpi_ec_read_status(ec));
 		} while (time_before(jiffies, delay));
-		if (acpi_ec_read_status(ec) & ACPI_EC_FLAG_IBF)
-			break;
 		pr_debug(PREFIX "controller reset, restart transaction\n");
 		spin_lock_irqsave(&ec->lock, flags);
 		start_transaction(ec);

drivers/acpi/processor_driver.c

···
 };
 MODULE_DEVICE_TABLE(acpi, processor_device_ids);
 
-static SIMPLE_DEV_PM_OPS(acpi_processor_pm,
-			 acpi_processor_suspend, acpi_processor_resume);
-
 static struct acpi_driver acpi_processor_driver = {
 	.name = "processor",
 	.class = ACPI_PROCESSOR_CLASS,
···
 		.remove = acpi_processor_remove,
 		.notify = acpi_processor_notify,
 		},
-	.drv.pm = &acpi_processor_pm,
 };
 
 #define INSTALL_NOTIFY_HANDLER		1
···
 	if (result < 0)
 		return result;
 
+	acpi_processor_syscore_init();
+
 	acpi_processor_install_hotplug_notify();
 
 	acpi_thermal_cpufreq_init();
···
 	acpi_thermal_cpufreq_exit();
 
 	acpi_processor_uninstall_hotplug_notify();
+
+	acpi_processor_syscore_exit();
 
 	acpi_bus_unregister_driver(&acpi_processor_driver);
 

drivers/acpi/processor_idle.c

···
 #include <linux/sched.h>       /* need_resched() */
 #include <linux/clockchips.h>
 #include <linux/cpuidle.h>
+#include <linux/syscore_ops.h>
 
 /*
  * Include the apic definitions for x86 to have the APIC timer related defines
···
 
 #endif
 
+#ifdef CONFIG_PM_SLEEP
 static u32 saved_bm_rld;
 
-static void acpi_idle_bm_rld_save(void)
+int acpi_processor_suspend(void)
 {
 	acpi_read_bit_register(ACPI_BITREG_BUS_MASTER_RLD, &saved_bm_rld);
+	return 0;
 }
-static void acpi_idle_bm_rld_restore(void)
+
+void acpi_processor_resume(void)
 {
 	u32 resumed_bm_rld;
 
 	acpi_read_bit_register(ACPI_BITREG_BUS_MASTER_RLD, &resumed_bm_rld);
+	if (resumed_bm_rld == saved_bm_rld)
+		return;
 
-	if (resumed_bm_rld != saved_bm_rld)
-		acpi_write_bit_register(ACPI_BITREG_BUS_MASTER_RLD, saved_bm_rld);
+	acpi_write_bit_register(ACPI_BITREG_BUS_MASTER_RLD, saved_bm_rld);
 }
 
-int acpi_processor_suspend(struct device *dev)
+static struct syscore_ops acpi_processor_syscore_ops = {
+	.suspend = acpi_processor_suspend,
+	.resume = acpi_processor_resume,
+};
+
+void acpi_processor_syscore_init(void)
 {
-	acpi_idle_bm_rld_save();
-	return 0;
+	register_syscore_ops(&acpi_processor_syscore_ops);
 }
 
-int acpi_processor_resume(struct device *dev)
+void acpi_processor_syscore_exit(void)
 {
-	acpi_idle_bm_rld_restore();
-	return 0;
+	unregister_syscore_ops(&acpi_processor_syscore_ops);
 }
+#endif /* CONFIG_PM_SLEEP */
 
 #if defined(CONFIG_X86)
 static void tsc_check_state(int state)

drivers/acpi/scan.c

···
 	acpi_set_pnp_ids(handle, &pnp, type);
 
 	if (!pnp.type.hardware_id)
-		return;
+		goto out;
 
 	/*
 	 * This relies on the fact that acpi_install_notify_handler() will not
···
 		}
 	}
 
+out:
 	acpi_free_pnp_ids(&pnp);
 }
 

drivers/acpi/video.c

···
 		DMI_MATCH(DMI_PRODUCT_NAME, "HP Pavilion dm4 Notebook PC"),
 		},
 	},
+	{
+	 .callback = video_ignore_initial_backlight,
+	 .ident = "HP 1000 Notebook PC",
+	 .matches = {
+		DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"),
+		DMI_MATCH(DMI_PRODUCT_NAME, "HP 1000 Notebook PC"),
+		},
+	},
 	{}
 };
 

drivers/ata/pata_ep93xx.c

···
 	}
 
 	mem_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (!mem_res) {
-		err = -ENXIO;
-		goto err_rel_gpio;
-	}
-
 	ide_base = devm_ioremap_resource(&pdev->dev, mem_res);
 	if (IS_ERR(ide_base)) {
 		err = PTR_ERR(ide_base);

drivers/base/power/common.c

···
 int dev_pm_put_subsys_data(struct device *dev)
 {
 	struct pm_subsys_data *psd;
-	int ret = 0;
+	int ret = 1;
 
 	spin_lock_irq(&dev->power.lock);
 
 	psd = dev_to_psd(dev);
-	if (!psd) {
-		ret = -EINVAL;
+	if (!psd)
 		goto out;
-	}
 
 	if (--psd->refcount == 0) {
 		dev->power.subsys_data = NULL;
-		kfree(psd);
-		ret = 1;
+	} else {
+		psd = NULL;
+		ret = 0;
 	}
 
  out:
 	spin_unlock_irq(&dev->power.lock);
+	kfree(psd);
 
 	return ret;
 }

drivers/block/rbd.c

···
 #define	SECTOR_SHIFT	9
 #define	SECTOR_SIZE	(1ULL << SECTOR_SHIFT)
 
+/*
+ * Increment the given counter and return its updated value.
+ * If the counter is already 0 it will not be incremented.
+ * If the counter is already at its maximum value returns
+ * -EINVAL without updating it.
+ */
+static int atomic_inc_return_safe(atomic_t *v)
+{
+	unsigned int counter;
+
+	counter = (unsigned int)__atomic_add_unless(v, 1, 0);
+	if (counter <= (unsigned int)INT_MAX)
+		return (int)counter;
+
+	atomic_dec(v);
+
+	return -EINVAL;
+}
+
+/* Decrement the counter.  Return the resulting value, or -EINVAL */
+static int atomic_dec_return_safe(atomic_t *v)
+{
+	int counter;
+
+	counter = atomic_dec_return(v);
+	if (counter >= 0)
+		return counter;
+
+	atomic_inc(v);
+
+	return -EINVAL;
+}
+
 #define RBD_DRV_NAME "rbd"
 #define RBD_DRV_NAME_LONG "rbd (rados block device)"
 
···
  * block device image metadata (in-memory version)
  */
 struct rbd_image_header {
-	/* These four fields never change for a given rbd image */
+	/* These six fields never change for a given rbd image */
 	char *object_prefix;
-	u64 features;
 	__u8 obj_order;
 	__u8 crypt_type;
 	__u8 comp_type;
+	u64 stripe_unit;
+	u64 stripe_count;
+	u64 features;		/* Might be changeable someday? */
 
 	/* The remaining fields need to be updated occasionally */
 	u64 image_size;
 	struct ceph_snap_context *snapc;
-	char *snap_names;
-	u64 *snap_sizes;
-
-	u64 stripe_unit;
-	u64 stripe_count;
+	char *snap_names;	/* format 1 only */
+	u64 *snap_sizes;	/* format 1 only */
 };
 
 /*
···
 		};
 	};
 	struct page		**copyup_pages;
+	u32			copyup_page_count;
 
 	struct ceph_osd_request	*osd_req;
 
···
 		struct rbd_obj_request	*obj_request;	/* obj req initiator */
 	};
 	struct page		**copyup_pages;
+	u32			copyup_page_count;
 	spinlock_t		completion_lock;/* protects next_completion */
 	u32			next_completion;
 	rbd_img_callback_t	callback;
···
 
 	struct rbd_spec		*parent_spec;
 	u64			parent_overlap;
+	atomic_t		parent_ref;
 	struct rbd_device	*parent;
 
 	/* protects updating the header */
···
 		       size_t count);
 static ssize_t rbd_remove(struct bus_type *bus, const char *buf,
 			  size_t count);
-static int rbd_dev_image_probe(struct rbd_device *rbd_dev);
+static int rbd_dev_image_probe(struct rbd_device *rbd_dev, bool mapping);
+static void rbd_spec_put(struct rbd_spec *spec);
 
 static struct bus_attribute rbd_bus_attrs[] = {
 	__ATTR(add, S_IWUSR, NULL, rbd_add),
···
 static void rbd_dev_remove_parent(struct rbd_device *rbd_dev);
 
 static int rbd_dev_refresh(struct rbd_device *rbd_dev);
-static int rbd_dev_v2_refresh(struct rbd_device *rbd_dev);
+static int rbd_dev_v2_header_onetime(struct rbd_device *rbd_dev);
+static int rbd_dev_v2_header_info(struct rbd_device *rbd_dev);
 static const char *rbd_dev_v2_snap_name(struct rbd_device *rbd_dev,
 					u64 snap_id);
 static int _rbd_dev_v2_snap_size(struct rbd_device *rbd_dev, u64 snap_id,
···
 }
 
 /*
- * Create a new header structure, translate header format from the on-disk
- * header.
+ * Fill an rbd image header with information from the given format 1
+ * on-disk header.
  */
-static int rbd_header_from_disk(struct rbd_image_header *header,
+static int rbd_header_from_disk(struct rbd_device *rbd_dev,
 				 struct rbd_image_header_ondisk *ondisk)
 {
+	struct rbd_image_header *header = &rbd_dev->header;
+	bool first_time = header->object_prefix == NULL;
+	struct ceph_snap_context *snapc;
+	char *object_prefix = NULL;
+	char *snap_names = NULL;
+	u64 *snap_sizes = NULL;
 	u32 snap_count;
-	size_t len;
 	size_t size;
+	int ret = -ENOMEM;
 	u32 i;
 
-	memset(header, 0, sizeof (*header));
+	/* Allocate this now to avoid having to handle failure below */
+
+	if (first_time) {
+		size_t len;
+
+		len = strnlen(ondisk->object_prefix,
+				sizeof (ondisk->object_prefix));
+		object_prefix = kmalloc(len + 1, GFP_KERNEL);
+		if (!object_prefix)
+			return -ENOMEM;
+		memcpy(object_prefix, ondisk->object_prefix, len);
+		object_prefix[len] = '\0';
+	}
+
+	/* Allocate the snapshot context and fill it in */
 
 	snap_count = le32_to_cpu(ondisk->snap_count);
-
-	len = strnlen(ondisk->object_prefix, sizeof (ondisk->object_prefix));
-	header->object_prefix = kmalloc(len + 1, GFP_KERNEL);
-	if (!header->object_prefix)
-		return -ENOMEM;
-	memcpy(header->object_prefix, ondisk->object_prefix, len);
-	header->object_prefix[len] = '\0';
-
+	snapc = ceph_create_snap_context(snap_count, GFP_KERNEL);
+	if (!snapc)
+		goto out_err;
+	snapc->seq = le64_to_cpu(ondisk->snap_seq);
 	if (snap_count) {
+		struct rbd_image_snap_ondisk *snaps;
 		u64 snap_names_len = le64_to_cpu(ondisk->snap_names_len);
 
-		/* Save a copy of the snapshot names */
+		/* We'll keep a copy of the snapshot names... */
 
-		if (snap_names_len > (u64) SIZE_MAX)
-			return -EIO;
-		header->snap_names = kmalloc(snap_names_len, GFP_KERNEL);
-		if (!header->snap_names)
+		if (snap_names_len > (u64)SIZE_MAX)
+			goto out_2big;
+		snap_names = kmalloc(snap_names_len, GFP_KERNEL);
+		if (!snap_names)
 			goto out_err;
+
+		/* ...as well as the array of their sizes. */
+
+		size = snap_count * sizeof (*header->snap_sizes);
+		snap_sizes = kmalloc(size, GFP_KERNEL);
+		if (!snap_sizes)
+			goto out_err;
+
 		/*
-		 * Note that rbd_dev_v1_header_read() guarantees
-		 * the ondisk buffer we're working with has
+		 * Copy the names, and fill in each snapshot's id
+		 * and size.
+		 *
+		 * Note that rbd_dev_v1_header_info() guarantees the
+		 * ondisk buffer we're working with has
 		 * snap_names_len bytes beyond the end of the
 		 * snapshot id array, this memcpy() is safe.
 		 */
-		memcpy(header->snap_names, &ondisk->snaps[snap_count],
-			snap_names_len);
-
-		/* Record each snapshot's size */
-
-		size = snap_count * sizeof (*header->snap_sizes);
-		header->snap_sizes = kmalloc(size, GFP_KERNEL);
-		if (!header->snap_sizes)
-			goto out_err;
-		for (i = 0; i < snap_count; i++)
-			header->snap_sizes[i] =
-				le64_to_cpu(ondisk->snaps[i].image_size);
-	} else {
-		header->snap_names = NULL;
-		header->snap_sizes = NULL;
+		memcpy(snap_names, &ondisk->snaps[snap_count], snap_names_len);
+		snaps = ondisk->snaps;
+		for (i = 0; i < snap_count; i++) {
+			snapc->snaps[i] = le64_to_cpu(snaps[i].id);
+			snap_sizes[i] = le64_to_cpu(snaps[i].image_size);
+		}
 	}
 
-	header->features = 0;	/* No features support in v1 images */
-	header->obj_order = ondisk->options.order;
-	header->crypt_type = ondisk->options.crypt_type;
-	header->comp_type = ondisk->options.comp_type;
+	/* We won't fail any more, fill in the header */
 
-	/* Allocate and fill in the snapshot context */
+	down_write(&rbd_dev->header_rwsem);
+	if (first_time) {
+		header->object_prefix = object_prefix;
+		header->obj_order = ondisk->options.order;
+		header->crypt_type = ondisk->options.crypt_type;
+		header->comp_type = ondisk->options.comp_type;
+		/* The rest aren't used for format 1 images */
+		header->stripe_unit = 0;
+		header->stripe_count = 0;
+		header->features = 0;
+	} else {
+		ceph_put_snap_context(header->snapc);
+		kfree(header->snap_names);
+		kfree(header->snap_sizes);
+	}
+
+	/* The remaining fields always get updated (when we refresh) */
 
 	header->image_size = le64_to_cpu(ondisk->image_size);
+	header->snapc = snapc;
+	header->snap_names = snap_names;
+	header->snap_sizes = snap_sizes;
 
-	header->snapc = ceph_create_snap_context(snap_count, GFP_KERNEL);
-	if (!header->snapc)
-		goto out_err;
-	header->snapc->seq = le64_to_cpu(ondisk->snap_seq);
-	for (i = 0; i < snap_count; i++)
-		header->snapc->snaps[i] = le64_to_cpu(ondisk->snaps[i].id);
+	/* Make sure mapping size is consistent with header info */
+
+	if (rbd_dev->spec->snap_id == CEPH_NOSNAP || first_time)
+		if (rbd_dev->mapping.size != header->image_size)
+			rbd_dev->mapping.size = header->image_size;
+
+	up_write(&rbd_dev->header_rwsem);
 
 	return 0;
-
+out_2big:
+	ret = -EIO;
 out_err:
-	kfree(header->snap_sizes);
-	header->snap_sizes = NULL;
-	kfree(header->snap_names);
-	header->snap_names = NULL;
-	kfree(header->object_prefix);
-	header->object_prefix = NULL;
+	kfree(snap_sizes);
+	kfree(snap_names);
+	ceph_put_snap_context(snapc);
+	kfree(object_prefix);
 
-	return -ENOMEM;
+	return ret;
 }
 
 static const char *_rbd_dev_v1_snap_name(struct rbd_device *rbd_dev, u32 which)
···
 
 static int rbd_dev_mapping_set(struct rbd_device *rbd_dev)
 {
-	const char *snap_name = rbd_dev->spec->snap_name;
-	u64 snap_id;
+	u64 snap_id = rbd_dev->spec->snap_id;
 	u64 size = 0;
 	u64 features = 0;
 	int ret;
-
-	if (strcmp(snap_name, RBD_SNAP_HEAD_NAME)) {
-		snap_id = rbd_snap_id_by_name(rbd_dev, snap_name);
-		if (snap_id == CEPH_NOSNAP)
-			return -ENOENT;
-	} else {
-		snap_id = CEPH_NOSNAP;
-	}
 
 	ret = rbd_snap_size(rbd_dev, snap_id, &size);
 	if (ret)
···
 	rbd_dev->mapping.size = size;
 	rbd_dev->mapping.features = features;
 
-	/* If we are mapping a snapshot it must be marked read-only */
-
-	if (snap_id != CEPH_NOSNAP)
-		rbd_dev->mapping.read_only = true;
-
 	return 0;
 }
 
···
 {
 	rbd_dev->mapping.size = 0;
 	rbd_dev->mapping.features = 0;
-	rbd_dev->mapping.read_only = true;
-}
-
-static void rbd_dev_clear_mapping(struct rbd_device *rbd_dev)
-{
-	rbd_dev->mapping.size = 0;
-	rbd_dev->mapping.features = 0;
-	rbd_dev->mapping.read_only = true;
 }
 
 static const char *rbd_segment_name(struct rbd_device *rbd_dev, u64 offset)
···
 	kref_put(&obj_request->kref, rbd_obj_request_destroy);
 }
 
-static void rbd_img_request_get(struct rbd_img_request *img_request)
-{
-	dout("%s: img %p (was %d)\n", __func__, img_request,
-		atomic_read(&img_request->kref.refcount));
-	kref_get(&img_request->kref);
-}
-
+static bool img_request_child_test(struct rbd_img_request *img_request);
+static void rbd_parent_request_destroy(struct kref *kref);
 static void rbd_img_request_destroy(struct kref *kref);
 static void rbd_img_request_put(struct rbd_img_request *img_request)
 {
 	rbd_assert(img_request != NULL);
 	dout("%s: img %p (was %d)\n", __func__, img_request,
 		atomic_read(&img_request->kref.refcount));
-	kref_put(&img_request->kref, rbd_img_request_destroy);
+	if (img_request_child_test(img_request))
+		kref_put(&img_request->kref, rbd_parent_request_destroy);
+	else
+		kref_put(&img_request->kref, rbd_img_request_destroy);
 }
 
 static inline void rbd_img_obj_request_add(struct rbd_img_request *img_request,
···
 	smp_mb();
 }
 
+static void img_request_child_clear(struct rbd_img_request *img_request)
+{
+	clear_bit(IMG_REQ_CHILD, &img_request->flags);
+	smp_mb();
+}
+
 static bool img_request_child_test(struct rbd_img_request *img_request)
 {
 	smp_mb();
···
 static void img_request_layered_set(struct rbd_img_request *img_request)
 {
 	set_bit(IMG_REQ_LAYERED, &img_request->flags);
+	smp_mb();
+}
+
+static void img_request_layered_clear(struct rbd_img_request *img_request)
+{
+	clear_bit(IMG_REQ_LAYERED, &img_request->flags);
 	smp_mb();
 }
 
···
 	kmem_cache_free(rbd_obj_request_cache, obj_request);
 }
 
+/* It's OK to call this for a device with no parent */
+
+static void rbd_spec_put(struct rbd_spec *spec);
+static void rbd_dev_unparent(struct rbd_device *rbd_dev)
+{
+	rbd_dev_remove_parent(rbd_dev);
+	rbd_spec_put(rbd_dev->parent_spec);
+	rbd_dev->parent_spec = NULL;
+	rbd_dev->parent_overlap = 0;
+}
+
+/*
+ * Parent image reference counting is used to determine when an
+ * image's parent fields can be safely torn down--after there are no
+ * more in-flight requests to the parent image.  When the last
+ * reference is dropped, cleaning them up is safe.
+ */
+static void rbd_dev_parent_put(struct rbd_device *rbd_dev)
+{
+	int counter;
+
+	if (!rbd_dev->parent_spec)
+		return;
+
+	counter = atomic_dec_return_safe(&rbd_dev->parent_ref);
+	if (counter > 0)
+		return;
+
+	/* Last reference; clean up parent data structures */
+
+	if (!counter)
+		rbd_dev_unparent(rbd_dev);
+	else
+		rbd_warn(rbd_dev, "parent reference underflow\n");
+}
+
+/*
+ * If an image has a non-zero parent overlap, get a reference to its
+ * parent.
+ *
+ * We must get the reference before checking for the overlap to
+ * coordinate properly with zeroing the parent overlap in
+ * rbd_dev_v2_parent_info() when an image gets flattened.  We
+ * drop it again if there is no overlap.
+ *
+ * Returns true if the rbd device has a parent with a non-zero
+ * overlap and a reference for it was successfully taken, or
+ * false otherwise.
+ */
+static bool rbd_dev_parent_get(struct rbd_device *rbd_dev)
+{
+	int counter;
+
+	if (!rbd_dev->parent_spec)
+		return false;
+
+	counter = atomic_inc_return_safe(&rbd_dev->parent_ref);
+	if (counter > 0 && rbd_dev->parent_overlap)
+		return true;
+
+	/* Image was flattened, but parent is not yet torn down */
+
+	if (counter < 0)
+		rbd_warn(rbd_dev, "parent reference overflow\n");
+
+	return false;
+}
+
 /*
  * Caller is responsible for filling in the list of object requests
  * that comprises the image request, and the Linux request pointer
···
 static struct rbd_img_request *rbd_img_request_create(
 					struct rbd_device *rbd_dev,
 					u64 offset, u64 length,
-					bool write_request,
-					bool child_request)
+					bool write_request)
 {
 	struct rbd_img_request *img_request;
 
···
 	} else {
 		img_request->snap_id = rbd_dev->spec->snap_id;
 	}
-	if (child_request)
-		img_request_child_set(img_request);
-	if (rbd_dev->parent_spec)
+	if (rbd_dev_parent_get(rbd_dev))
 		img_request_layered_set(img_request);
 	spin_lock_init(&img_request->completion_lock);
 	img_request->next_completion = 0;
···
 	img_request->obj_request_count = 0;
 	INIT_LIST_HEAD(&img_request->obj_requests);
 	kref_init(&img_request->kref);
-
-	rbd_img_request_get(img_request);	/* Avoid a warning */
-	rbd_img_request_put(img_request);	/* TEMPORARY */
 
 	dout("%s: rbd_dev %p %s %llu/%llu -> img %p\n", __func__, rbd_dev,
 		write_request ? "write" : "read", offset, length,
···
 		rbd_img_obj_request_del(img_request, obj_request);
 	rbd_assert(img_request->obj_request_count == 0);
 
+	if (img_request_layered_test(img_request)) {
+		img_request_layered_clear(img_request);
+		rbd_dev_parent_put(img_request->rbd_dev);
+	}
+
 	if (img_request_write_test(img_request))
 		ceph_put_snap_context(img_request->snapc);
 
-	if (img_request_child_test(img_request))
-		rbd_obj_request_put(img_request->obj_request);
-
 	kmem_cache_free(rbd_img_request_cache, img_request);
+}
+
+static struct rbd_img_request *rbd_parent_request_create(
+					struct rbd_obj_request *obj_request,
+					u64 img_offset, u64 length)
+{
+	struct rbd_img_request *parent_request;
+	struct rbd_device *rbd_dev;
+
+	rbd_assert(obj_request->img_request);
+	rbd_dev = obj_request->img_request->rbd_dev;
+
+	parent_request = rbd_img_request_create(rbd_dev->parent,
+						img_offset, length, false);
+	if (!parent_request)
+		return NULL;
+
+	img_request_child_set(parent_request);
+	rbd_obj_request_get(obj_request);
+	parent_request->obj_request = obj_request;
+
+	return parent_request;
+}
+
+static void rbd_parent_request_destroy(struct kref *kref)
+{
+	struct rbd_img_request *parent_request;
+	struct rbd_obj_request *orig_request;
+
+	parent_request = container_of(kref, struct rbd_img_request, kref);
+	orig_request = parent_request->obj_request;
+
+	parent_request->obj_request = NULL;
+	rbd_obj_request_put(orig_request);
+	img_request_child_clear(parent_request);
+
+	rbd_img_request_destroy(kref);
 }
 
 static bool rbd_img_obj_end_request(struct rbd_obj_request *obj_request)
···
 {
 	struct rbd_img_request *img_request;
 	struct rbd_device *rbd_dev;
-	u64 length;
+	struct page **pages;
 	u32 page_count;
 
 	rbd_assert(obj_request->type == OBJ_REQUEST_BIO);
···
 
 	rbd_dev = img_request->rbd_dev;
 	rbd_assert(rbd_dev);
-	length = (u64)1 << rbd_dev->header.obj_order;
-	page_count = (u32)calc_pages_for(0, length);
 
-	rbd_assert(obj_request->copyup_pages);
-	ceph_release_page_vector(obj_request->copyup_pages, page_count);
+	pages = obj_request->copyup_pages;
+	rbd_assert(pages != NULL);
 	obj_request->copyup_pages = NULL;
+	page_count = obj_request->copyup_page_count;
+	rbd_assert(page_count);
+	obj_request->copyup_page_count = 0;
+	ceph_release_page_vector(pages, page_count);
 
 	/*
 	 * We want the transfer count to reflect the size of the
···
 	struct ceph_osd_client *osdc;
 	struct rbd_device *rbd_dev;
 	struct page **pages;
-	int result;
-	u64 obj_size;
-	u64 xferred;
+	u32 page_count;
+	int img_result;
+	u64 parent_length;
+	u64 offset;
+	u64 length;
 
 	rbd_assert(img_request_child_test(img_request));
 
···
 	pages = img_request->copyup_pages;
 	rbd_assert(pages != NULL);
 	img_request->copyup_pages = NULL;
+	page_count = img_request->copyup_page_count;
+	rbd_assert(page_count);
+	img_request->copyup_page_count = 0;
 
 	orig_request = img_request->obj_request;
 	rbd_assert(orig_request != NULL);
-	rbd_assert(orig_request->type == OBJ_REQUEST_BIO);
-	result = img_request->result;
-	obj_size = img_request->length;
-	xferred = img_request->xferred;
-
-	rbd_dev = img_request->rbd_dev;
-	rbd_assert(rbd_dev);
-	rbd_assert(obj_size == (u64)1 << rbd_dev->header.obj_order);
-
+	rbd_assert(obj_request_type_valid(orig_request->type));
+	img_result = img_request->result;
+	parent_length = img_request->length;
+	rbd_assert(parent_length == img_request->xferred);
 	rbd_img_request_put(img_request);
 
-	if (result)
+	rbd_assert(orig_request->img_request);
+	rbd_dev = orig_request->img_request->rbd_dev;
+	rbd_assert(rbd_dev);
+
+	/*
+	 * If the overlap has become 0 (most likely because the
+	 * image has been flattened) we need to free the pages
+	 * and re-submit the original write request.
+	 */
+	if (!rbd_dev->parent_overlap) {
+		struct ceph_osd_client *osdc;
+
+		ceph_release_page_vector(pages, page_count);
+		osdc = &rbd_dev->rbd_client->client->osdc;
+		img_result = rbd_obj_request_submit(osdc, orig_request);
+		if (!img_result)
+			return;
+	}
+
+	if (img_result)
 		goto out_err;
 
-	/* Allocate the new copyup osd request for the original request */
-
-	result = -ENOMEM;
-	rbd_assert(!orig_request->osd_req);
+	/*
+	 * The original osd request is of no use to use any more.
+	 * We need a new one that can hold the two ops in a copyup
+	 * request.  Allocate the new copyup osd request for the
+	 * original request, and release the old one.
+	 */
+	img_result = -ENOMEM;
 	osd_req = rbd_osd_req_create_copyup(orig_request);
 	if (!osd_req)
 		goto out_err;
+	rbd_osd_req_destroy(orig_request->osd_req);
 	orig_request->osd_req = osd_req;
 	orig_request->copyup_pages = pages;
+	orig_request->copyup_page_count = page_count;
 
 	/* Initialize the copyup op */
 
 	osd_req_op_cls_init(osd_req, 0, CEPH_OSD_OP_CALL, "rbd", "copyup");
-	osd_req_op_cls_request_data_pages(osd_req, 0, pages, obj_size, 0,
+	osd_req_op_cls_request_data_pages(osd_req, 0, pages, parent_length, 0,
 						false, false);
 
 	/* Then the original write request op */
 
+	offset = orig_request->offset;
+	length = orig_request->length;
 	osd_req_op_extent_init(osd_req, 1, CEPH_OSD_OP_WRITE,
-					orig_request->offset,
-					orig_request->length, 0, 0);
-	osd_req_op_extent_osd_data_bio(osd_req, 1, orig_request->bio_list,
-					orig_request->length);
+					offset, length, 0, 0);
+	if (orig_request->type == OBJ_REQUEST_BIO)
+		osd_req_op_extent_osd_data_bio(osd_req, 1,
+					orig_request->bio_list, length);
+	else
+		osd_req_op_extent_osd_data_pages(osd_req, 1,
+					orig_request->pages, length,
+					offset & ~PAGE_MASK, false, false);
 
 	rbd_osd_req_format_write(orig_request);
 
···
 
 	orig_request->callback = rbd_img_obj_copyup_callback;
 	osdc = &rbd_dev->rbd_client->client->osdc;
-	result = rbd_obj_request_submit(osdc, orig_request);
-	if (!result)
+	img_result = rbd_obj_request_submit(osdc, orig_request);
+	if (!img_result)
 		return;
 out_err:
 	/* Record the error code and complete the request */
 
-	orig_request->result = result;
+	orig_request->result = img_result;
 	orig_request->xferred = 0;
 	obj_request_done_set(orig_request);
 	rbd_obj_request_complete(orig_request);
···
 	int result;
 
 	rbd_assert(obj_request_img_data_test(obj_request));
-	rbd_assert(obj_request->type == OBJ_REQUEST_BIO);
+	rbd_assert(obj_request_type_valid(obj_request->type));
 
 	img_request = obj_request->img_request;
 	rbd_assert(img_request != NULL);
 	rbd_dev = img_request->rbd_dev;
 	rbd_assert(rbd_dev->parent != NULL);
-
-	/*
-	 * First things first.  The original osd request is of no
-	 * use to use any more, we'll need a new one that can hold
-	 * the two ops in a copyup request.  We'll get that later,
-	 * but for now we can release the old one.
-	 */
-	rbd_osd_req_destroy(obj_request->osd_req);
-	obj_request->osd_req = NULL;
 
 	/*
 	 * Determine the byte range covered by the object in the
···
 	}
 
 	result = -ENOMEM;
-	parent_request = rbd_img_request_create(rbd_dev->parent,
-						img_offset, length,
-						false, true);
+	parent_request = rbd_parent_request_create(obj_request,
+						img_offset, length);
 	if (!parent_request)
 		goto out_err;
-	rbd_obj_request_get(obj_request);
-	parent_request->obj_request = obj_request;
 
 	result = rbd_img_request_fill(parent_request, OBJ_REQUEST_PAGES, pages);
 	if (result)
 		goto out_err;
 	parent_request->copyup_pages = pages;
+	parent_request->copyup_page_count = page_count;
 
 	parent_request->callback = rbd_img_obj_parent_read_full_callback;
 	result = rbd_img_request_submit(parent_request);
···
 		return 0;
 
 	parent_request->copyup_pages = NULL;
+	parent_request->copyup_page_count = 0;
 	parent_request->obj_request = NULL;
 	rbd_obj_request_put(obj_request);
 out_err:
···
 static void rbd_img_obj_exists_callback(struct rbd_obj_request *obj_request)
 {
 	struct rbd_obj_request *orig_request;
+	struct rbd_device *rbd_dev;
 	int result;
 
 	rbd_assert(!obj_request_img_data_test(obj_request));
···
 		obj_request->xferred, obj_request->length);
 	rbd_obj_request_put(obj_request);
 
-	rbd_assert(orig_request);
-	rbd_assert(orig_request->img_request);
+	/*
+	 * If the overlap has become 0 (most likely because the
+	 * image has been flattened) we need to free the pages
+	 * and re-submit the original write request.
+	 */
+	rbd_dev = orig_request->img_request->rbd_dev;
+	if (!rbd_dev->parent_overlap) {
+		struct ceph_osd_client *osdc;
+
+		rbd_obj_request_put(orig_request);
+		osdc = &rbd_dev->rbd_client->client->osdc;
+		result = rbd_obj_request_submit(osdc, orig_request);
+		if (!result)
+			return;
+	}
 
 	/*
 	 * Our only purpose here is to determine whether the object
···
 	struct rbd_obj_request *obj_request;
 	struct rbd_device *rbd_dev;
 	u64 obj_end;
+	u64 img_xferred;
+	int img_result;
 
 	rbd_assert(img_request_child_test(img_request));
 
+	/* First get what we need from the image request and release it */
+
 	obj_request = img_request->obj_request;
+	img_xferred = img_request->xferred;
+	img_result = img_request->result;
+	rbd_img_request_put(img_request);
+
+	/*
+	 * If the overlap has become 0 (most likely because the
+	 * image has been flattened) we need to re-submit the
+	 * original request.
+	 */
 	rbd_assert(obj_request);
 	rbd_assert(obj_request->img_request);
+	rbd_dev = obj_request->img_request->rbd_dev;
+	if (!rbd_dev->parent_overlap) {
+		struct ceph_osd_client *osdc;
 
-	obj_request->result = img_request->result;
+		osdc = &rbd_dev->rbd_client->client->osdc;
+		img_result = rbd_obj_request_submit(osdc, obj_request);
+		if (!img_result)
+			return;
+	}
+
+	obj_request->result = img_result;
 	if (obj_request->result)
 		goto out;
 
···
 	 */
 	rbd_assert(obj_request->img_offset < U64_MAX - obj_request->length);
 	obj_end = obj_request->img_offset + obj_request->length;
-	rbd_dev = obj_request->img_request->rbd_dev;
 	if (obj_end > rbd_dev->parent_overlap) {
 		u64 xferred = 0;
 
···
 			xferred = rbd_dev->parent_overlap -
 					obj_request->img_offset;
 
-		obj_request->xferred = min(img_request->xferred, xferred);
+		obj_request->xferred = min(img_xferred, xferred);
 	} else {
-		obj_request->xferred = img_request->xferred;
+		obj_request->xferred = img_xferred;
 	}
 out:
-	rbd_img_request_put(img_request);
 	rbd_img_obj_request_read_callback(obj_request);
 	rbd_obj_request_complete(obj_request);
 }
 
 static void rbd_img_parent_read(struct rbd_obj_request *obj_request)
 {
-	struct rbd_device *rbd_dev;
 	struct rbd_img_request *img_request;
 	int result;
 
 	rbd_assert(obj_request_img_data_test(obj_request));
 	rbd_assert(obj_request->img_request != NULL);
 	rbd_assert(obj_request->result == (s32) -ENOENT);
-	rbd_assert(obj_request->type == OBJ_REQUEST_BIO);
+	rbd_assert(obj_request_type_valid(obj_request->type));
 
-	rbd_dev = obj_request->img_request->rbd_dev;
-	rbd_assert(rbd_dev->parent != NULL);
 	/* rbd_read_finish(obj_request, obj_request->length); */
-	img_request = rbd_img_request_create(rbd_dev->parent,
+	img_request = rbd_parent_request_create(obj_request,
 						obj_request->img_offset,
-						obj_request->length,
-						false, true);
+						obj_request->length);
 	result = -ENOMEM;
 	if (!img_request)
 		goto out_err;
 
-	rbd_obj_request_get(obj_request);
-	img_request->obj_request = obj_request;
-
-	result = rbd_img_request_fill(img_request, OBJ_REQUEST_BIO,
-					obj_request->bio_list);
+	if (obj_request->type == OBJ_REQUEST_BIO)
+		result = rbd_img_request_fill(img_request, OBJ_REQUEST_BIO,
+						obj_request->bio_list);
+	else
+		result = rbd_img_request_fill(img_request, OBJ_REQUEST_PAGES,
+						obj_request->pages);
 	if (result)
 		goto out_err;
 
···
 static void rbd_watch_cb(u64 ver, u64 notify_id, u8 opcode, void *data)
 {
 	struct rbd_device *rbd_dev = (struct rbd_device *)data;
+	int ret;
 
 	if (!rbd_dev)
 		return;
···
 	dout("%s: \"%s\" notify_id %llu opcode %u\n", __func__,
 		rbd_dev->header_name, (unsigned long long)notify_id,
 		(unsigned int)opcode);
-	(void)rbd_dev_refresh(rbd_dev);
+	ret = rbd_dev_refresh(rbd_dev);
+	if (ret)
+		rbd_warn(rbd_dev, ": header refresh error (%d)\n", ret);
 
 	rbd_obj_notify_ack(rbd_dev, notify_id);
 }
···
  * Request sync osd watch/unwatch.  The value of "start" determines
  * whether a watch request is being initiated or torn down.
  */
-static int rbd_dev_header_watch_sync(struct rbd_device *rbd_dev, int start)
+static int rbd_dev_header_watch_sync(struct rbd_device *rbd_dev, bool start)
 {
 	struct ceph_osd_client *osdc = &rbd_dev->rbd_client->client->osdc;
 	struct rbd_obj_request *obj_request;
···
 					rbd_dev->watch_request->osd_req);
 
 	osd_req_op_watch_init(obj_request->osd_req, 0, CEPH_OSD_OP_WATCH,
-				rbd_dev->watch_event->cookie, 0, start);
+				rbd_dev->watch_event->cookie, 0, start ? 1 : 0);
 	rbd_osd_req_format_write(obj_request);
 
 	ret = rbd_obj_request_submit(osdc, obj_request);
···
 			goto end_request;	/* Shouldn't happen */
 		}
 
+		result = -EIO;
+		if (offset + length > rbd_dev->mapping.size) {
+			rbd_warn(rbd_dev, "beyond EOD (%llu~%llu > %llu)\n",
+				offset, length, rbd_dev->mapping.size);
+			goto end_request;
+		}
+
 		result = -ENOMEM;
 		img_request = rbd_img_request_create(rbd_dev, offset, length,
-							write_request, false);
+							write_request);
 		if (!img_request)
 			goto end_request;
 
···
 }
 
 /*
- * Read the complete header for the given rbd device.
- *
- * Returns a pointer to a dynamically-allocated buffer containing
- * the complete and validated header.  Caller can pass the address
- * of a variable that will be filled in with the version of the
- * header object at the time it was read.
- *
- * Returns a pointer-coded errno if a failure occurs.
+ * Read the complete header for the given rbd device.  On successful
+ * return, the rbd_dev->header field will contain up-to-date
+ * information about the image.
  */
-static struct rbd_image_header_ondisk *
-rbd_dev_v1_header_read(struct rbd_device *rbd_dev)
+static int rbd_dev_v1_header_info(struct rbd_device *rbd_dev)
 {
 	struct rbd_image_header_ondisk *ondisk = NULL;
 	u32 snap_count = 0;
···
 		size += names_size;
 		ondisk = kmalloc(size, GFP_KERNEL);
 		if (!ondisk)
-			return ERR_PTR(-ENOMEM);
+			return -ENOMEM;
 
 		ret = rbd_obj_read_sync(rbd_dev, rbd_dev->header_name,
 				       0, size, ondisk);
 		if (ret < 0)
-			goto out_err;
+			goto out;
 		if ((size_t)ret < size) {
 			ret = -ENXIO;
 			rbd_warn(rbd_dev, "short header read (want %zd got %d)",
 				size, ret);
-			goto out_err;
+			goto out;
 		}
 		if (!rbd_dev_ondisk_valid(ondisk)) {
 			ret = -ENXIO;
 			rbd_warn(rbd_dev, "invalid header");
-			goto out_err;
+			goto out;
 		}
 
 		names_size = le64_to_cpu(ondisk->snap_names_len);
···
 		snap_count = le32_to_cpu(ondisk->snap_count);
 	} while (snap_count != want_count);
 
-	return ondisk;
-
-out_err:
+	ret = rbd_header_from_disk(rbd_dev, ondisk);
+out:
 	kfree(ondisk);
-
-	return ERR_PTR(ret);
-}
-
-/*
- * reload the ondisk the header
- */
-static int rbd_read_header(struct rbd_device *rbd_dev,
-			   struct rbd_image_header *header)
-{
-	struct rbd_image_header_ondisk *ondisk;
-	int ret;
-
-	ondisk = rbd_dev_v1_header_read(rbd_dev);
-	if (IS_ERR(ondisk))
-		return PTR_ERR(ondisk);
-	ret = rbd_header_from_disk(header, ondisk);
-	kfree(ondisk);
-
-	return ret;
-}
-
-static void rbd_update_mapping_size(struct rbd_device *rbd_dev)
-{
-	if (rbd_dev->spec->snap_id != CEPH_NOSNAP)
-		return;
-
-	if (rbd_dev->mapping.size != rbd_dev->header.image_size) {
-		sector_t size;
-
-		rbd_dev->mapping.size = rbd_dev->header.image_size;
-		size = (sector_t)rbd_dev->mapping.size / SECTOR_SIZE;
-		dout("setting size to %llu sectors", (unsigned long long)size);
-		set_capacity(rbd_dev->disk, size);
-	}
-}
-
-/*
- * only read the first part of the ondisk header, without the snaps info
- */
-static int rbd_dev_v1_refresh(struct rbd_device *rbd_dev)
-{
-	int ret;
-	struct rbd_image_header h;
-
-	ret = rbd_read_header(rbd_dev, &h);
-	if (ret < 0)
-		return ret;
-
-	down_write(&rbd_dev->header_rwsem);
-
-	/* Update image size, and check for resize of mapped image */
-	rbd_dev->header.image_size = h.image_size;
-	rbd_update_mapping_size(rbd_dev);
-
-	/* rbd_dev->header.object_prefix shouldn't change */
-	kfree(rbd_dev->header.snap_sizes);
-	kfree(rbd_dev->header.snap_names);
-	/* osd requests may still refer to snapc */
-	ceph_put_snap_context(rbd_dev->header.snapc);
-
-	rbd_dev->header.image_size = h.image_size;
-	rbd_dev->header.snapc = h.snapc;
-	rbd_dev->header.snap_names = h.snap_names;
-	rbd_dev->header.snap_sizes = h.snap_sizes;
-	/* Free the extra copy of the object prefix */
-	if (strcmp(rbd_dev->header.object_prefix, h.object_prefix))
-		rbd_warn(rbd_dev, "object prefix changed (ignoring)");
-	kfree(h.object_prefix);
-
-	up_write(&rbd_dev->header_rwsem);
 
 	return ret;
 }
···
 
 static int rbd_dev_refresh(struct rbd_device *rbd_dev)
 {
-	u64 image_size;
+	u64 mapping_size;
 	int ret;
 
 	rbd_assert(rbd_image_format_valid(rbd_dev->image_format));
-	image_size = rbd_dev->header.image_size;
+	mapping_size = rbd_dev->mapping.size;
 	mutex_lock_nested(&ctl_mutex, SINGLE_DEPTH_NESTING);
 	if (rbd_dev->image_format == 1)
-		ret = rbd_dev_v1_refresh(rbd_dev);
+		ret = rbd_dev_v1_header_info(rbd_dev);
 	else
-		ret = rbd_dev_v2_refresh(rbd_dev);
+		ret = rbd_dev_v2_header_info(rbd_dev);
 
 	/* If it's a mapped snapshot, validate its EXISTS flag */
 
 	rbd_exists_validate(rbd_dev);
 	mutex_unlock(&ctl_mutex);
-	if (ret)
-		rbd_warn(rbd_dev, "got notification but failed to "
-			   " update snaps: %d\n", ret);
-	if (image_size != rbd_dev->header.image_size)
+	if (mapping_size != rbd_dev->mapping.size) {
+		sector_t size;
+
+		size = (sector_t)rbd_dev->mapping.size / SECTOR_SIZE;
+		dout("setting size to %llu sectors", (unsigned long long)size);
+		set_capacity(rbd_dev->disk, size);
 		revalidate_disk(rbd_dev->disk);
+	}
 
 	return ret;
 }
···
 	int ret;
 
 	ret = rbd_dev_refresh(rbd_dev);
+	if (ret)
+		rbd_warn(rbd_dev, ": manual header refresh error (%d)\n", ret);
 
 	return ret < 0 ? ret : size;
 }
···
 
 	spin_lock_init(&rbd_dev->lock);
 	rbd_dev->flags = 0;
+	atomic_set(&rbd_dev->parent_ref, 0);
 	INIT_LIST_HEAD(&rbd_dev->node);
 	init_rwsem(&rbd_dev->header_rwsem);
 
···
 	__le64 snapid;
 	void *p;
 	void *end;
+	u64 pool_id;
 	char *image_id;
 	u64 overlap;
 	int ret;
···
 	p = reply_buf;
 	end = reply_buf + ret;
 	ret = -ERANGE;
-	ceph_decode_64_safe(&p, end, parent_spec->pool_id, out_err);
-	if (parent_spec->pool_id == CEPH_NOPOOL)
+	ceph_decode_64_safe(&p, end, pool_id, out_err);
+	if (pool_id == CEPH_NOPOOL) {
+		/*
+		 * Either the parent never existed, or we have
+		 * record of it but the image got flattened so it no
+		 * longer has a parent.  When the parent of a
+		 * layered image disappears we immediately set the
+		 * overlap to 0.  The effect of this is that all new
+		 * requests will be treated as if the image had no
+		 * parent.
+		 */
+		if (rbd_dev->parent_overlap) {
+			rbd_dev->parent_overlap = 0;
+			smp_mb();
+			rbd_dev_parent_put(rbd_dev);
+			pr_info("%s: clone image has been flattened\n",
+				rbd_dev->disk->disk_name);
+		}
+
 		goto out;	/* No parent?  No problem. */
+	}
 
 	/* The ceph file layout needs to fit pool id in 32 bits */
 
 	ret = -EIO;
-	if (parent_spec->pool_id > (u64)U32_MAX) {
+	if (pool_id > (u64)U32_MAX) {
 		rbd_warn(NULL, "parent pool id too large (%llu > %u)\n",
-			(unsigned long long)parent_spec->pool_id, U32_MAX);
+			(unsigned long long)pool_id, U32_MAX);
 		goto out_err;
 	}
+	parent_spec->pool_id = pool_id;
 
 	image_id = ceph_extract_encoded_string(&p, end, NULL, GFP_KERNEL);
 	if (IS_ERR(image_id)) {
···
 	ceph_decode_64_safe(&p, end, parent_spec->snap_id, out_err);
 	ceph_decode_64_safe(&p, end, overlap, out_err);
 
-	rbd_dev->parent_overlap = overlap;
-	rbd_dev->parent_spec = parent_spec;
-	parent_spec = NULL;	/* rbd_dev now owns this */
+	if (overlap) {
+		rbd_spec_put(rbd_dev->parent_spec);
+		rbd_dev->parent_spec = parent_spec;
+		parent_spec = NULL;	/* rbd_dev now owns this */
+		rbd_dev->parent_overlap = overlap;
+	} else {
+		rbd_warn(rbd_dev, "ignoring parent of clone with overlap 0\n");
+	}
 out:
 	ret = 0;
 out_err:
···
 	for (i = 0; i < snap_count; i++)
 		snapc->snaps[i] = ceph_decode_64(&p);
 
+	ceph_put_snap_context(rbd_dev->header.snapc);
 	rbd_dev->header.snapc = snapc;
 
 	dout("  snap context seq = %llu, snap_count = %u\n",
···
 	return snap_name;
 }
 
-static int rbd_dev_v2_refresh(struct rbd_device *rbd_dev)
+static int rbd_dev_v2_header_info(struct rbd_device *rbd_dev)
 {
+	bool first_time = rbd_dev->header.object_prefix == NULL;
 	int ret;
 
 	down_write(&rbd_dev->header_rwsem);
 
+	if (first_time) {
+		ret = rbd_dev_v2_header_onetime(rbd_dev);
+		if (ret)
+			goto out;
+	}
+
+	/*
+	 * If the image supports layering, get the parent info.  We
+	 * need to probe the first time regardless.  Thereafter we
+	 * only need to if there's a parent, to see if it has
+	 * disappeared due to the mapped image getting flattened.
+	 */
+	if (rbd_dev->header.features & RBD_FEATURE_LAYERING &&
+			(first_time || rbd_dev->parent_spec)) {
+		bool warn;
+
+		ret = rbd_dev_v2_parent_info(rbd_dev);
+		if (ret)
+			goto out;
+
+		/*
+		 * Print a warning if this is the initial probe and
+		 * the image has a parent.  Don't print it if the
+		 * image now being probed is itself a parent.  We
+		 * can tell at this point because we won't know its
+		 * pool name yet (just its pool id).
+		 */
+		warn = rbd_dev->parent_spec && rbd_dev->spec->pool_name;
+		if (first_time && warn)
+			rbd_warn(rbd_dev, "WARNING: kernel layering "
+					"is EXPERIMENTAL!");
+	}
+
 	ret = rbd_dev_v2_image_size(rbd_dev);
 	if (ret)
 		goto out;
-	rbd_update_mapping_size(rbd_dev);
+
+	if (rbd_dev->spec->snap_id == CEPH_NOSNAP)
+		if (rbd_dev->mapping.size != rbd_dev->header.image_size)
+			rbd_dev->mapping.size = rbd_dev->header.image_size;
 
 	ret = rbd_dev_v2_snap_context(rbd_dev);
 	dout("rbd_dev_v2_snap_context returned %d\n", ret);
-	if (ret)
-		goto out;
 out:
 	up_write(&rbd_dev->header_rwsem);
 
···
 {
 	struct rbd_image_header	*header;
 
-	rbd_dev_remove_parent(rbd_dev);
-	rbd_spec_put(rbd_dev->parent_spec);
-	rbd_dev->parent_spec = NULL;
-	rbd_dev->parent_overlap = 0;
+	/* Drop parent reference unless it's already been done (or none) */
+
+	if (rbd_dev->parent_overlap)
+		rbd_dev_parent_put(rbd_dev);
 
 	/* Free dynamic fields from the header, then zero it out */
 
···
 	memset(header, 0, sizeof (*header));
 }
 
-static int rbd_dev_v1_probe(struct rbd_device *rbd_dev)
+static int rbd_dev_v2_header_onetime(struct rbd_device *rbd_dev)
 {
 	int ret;
-
-	/* Populate rbd image metadata */
-
-	ret = rbd_read_header(rbd_dev, &rbd_dev->header);
-	if (ret < 0)
-		goto out_err;
-
-	/* Version 1 images have no parent (no layering) */
-
-	rbd_dev->parent_spec = NULL;
-	rbd_dev->parent_overlap = 0;
-
-	dout("discovered version 1 image, header name is %s\n",
-		rbd_dev->header_name);
-
-	return 0;
-
-out_err:
-	kfree(rbd_dev->header_name);
-	rbd_dev->header_name = NULL;
-	kfree(rbd_dev->spec->image_id);
-	rbd_dev->spec->image_id = NULL;
-
-	return ret;
-}
-
-static int rbd_dev_v2_probe(struct rbd_device *rbd_dev)
-{
-	int ret;
-
-	ret = rbd_dev_v2_image_size(rbd_dev);
-	if (ret)
-		goto out_err;
-
-	/* Get the object prefix (a.k.a. block_name) for the image */
 
 	ret = rbd_dev_v2_object_prefix(rbd_dev);
 	if (ret)
 		goto out_err;
 
-	/* Get the and check features for the image */
-
+	/*
+	 * Get the and check features for the image.  Currently the
+	 * features are assumed to never change.
+	 */
 	ret = rbd_dev_v2_features(rbd_dev);
 	if (ret)
 		goto out_err;
-
-	/* If the image supports layering, get the parent info */
-
-	if (rbd_dev->header.features & RBD_FEATURE_LAYERING) {
-		ret = rbd_dev_v2_parent_info(rbd_dev);
-		if (ret)
-			goto out_err;
-
-		/*
-		 * Don't print a warning for parent images.  We can
-		 * tell this point because we won't know its pool
-		 * name yet (just its pool id).
-		 */
-		if (rbd_dev->spec->pool_name)
-			rbd_warn(rbd_dev, "WARNING: kernel layering "
-					"is EXPERIMENTAL!");
-	}
 
 	/* If the image supports fancy striping, get its parameters */
 
···
 		if (ret < 0)
 			goto out_err;
 	}
-
-	/* crypto and compression type aren't (yet) supported for v2 images */
-
-	rbd_dev->header.crypt_type = 0;
-	rbd_dev->header.comp_type = 0;
-
-	/* Get the snapshot context, plus the header version */
-
-	ret = rbd_dev_v2_snap_context(rbd_dev);
-	if (ret)
-		goto out_err;
-
-	dout("discovered version 2 image, header name is %s\n",
-		rbd_dev->header_name);
+	/* No support for crypto and compression type format 2 images */
 
 	return 0;
 out_err:
-	rbd_dev->parent_overlap = 0;
-	rbd_spec_put(rbd_dev->parent_spec);
-	rbd_dev->parent_spec = NULL;
-	kfree(rbd_dev->header_name);
-	rbd_dev->header_name = NULL;
+	rbd_dev->header.features = 0;
 	kfree(rbd_dev->header.object_prefix);
 	rbd_dev->header.object_prefix = NULL;
 
···
 	if (!parent)
 		goto out_err;
 
-	ret = rbd_dev_image_probe(parent);
+	ret = rbd_dev_image_probe(parent, false);
 	if (ret < 0)
 		goto out_err;
 	rbd_dev->parent = parent;
+	atomic_set(&rbd_dev->parent_ref, 1);
 
 	return 0;
 out_err:
 	if (parent) {
-		rbd_spec_put(rbd_dev->parent_spec);
+		rbd_dev_unparent(rbd_dev);
 		kfree(rbd_dev->header_name);
 		rbd_dev_destroy(parent);
 	} else {
···
 static int rbd_dev_device_setup(struct rbd_device *rbd_dev)
 {
 	int ret;
-
-	ret = rbd_dev_mapping_set(rbd_dev);
-	if (ret)
-		return ret;
 
 	/* generate unique id: find highest unique id, add one */
 	rbd_dev_id_get(rbd_dev);
···
 	if (ret)
 		goto err_out_blkdev;
 
-	ret = rbd_bus_add_dev(rbd_dev);
+	ret = rbd_dev_mapping_set(rbd_dev);
 	if (ret)
 		goto err_out_disk;
+	set_capacity(rbd_dev->disk, rbd_dev->mapping.size / SECTOR_SIZE);
+
+	ret = rbd_bus_add_dev(rbd_dev);
+	if (ret)
+		goto err_out_mapping;
 
 	/* Everything's ready.  Announce the disk to the world. */
 
-	set_capacity(rbd_dev->disk, rbd_dev->mapping.size / SECTOR_SIZE);
 	set_bit(RBD_DEV_FLAG_EXISTS, &rbd_dev->flags);
 	add_disk(rbd_dev->disk);
 
···
 
 	return ret;
 
+err_out_mapping:
+	rbd_dev_mapping_clear(rbd_dev);
 err_out_disk:
 	rbd_free_disk(rbd_dev);
 err_out_blkdev:
···
 
 static void rbd_dev_image_release(struct rbd_device *rbd_dev)
 {
-	int ret;
-
 	rbd_dev_unprobe(rbd_dev);
-	ret = rbd_dev_header_watch_sync(rbd_dev, 0);
-	if (ret)
-		rbd_warn(rbd_dev, "failed to cancel watch event (%d)\n", ret);
 	kfree(rbd_dev->header_name);
 	rbd_dev->header_name = NULL;
 	rbd_dev->image_format = 0;
···
 
 /*
  * Probe for the existence of the header object for the given rbd
- * device.  For format 2 images this includes determining the image
- * id.
+ * device.  If this image is the one being mapped (i.e., not a
+ * parent), initiate a watch on its header object before using that
+ * object to get detailed information about the rbd image.
  */
-static int rbd_dev_image_probe(struct rbd_device *rbd_dev)
+static int rbd_dev_image_probe(struct rbd_device *rbd_dev, bool mapping)
 {
 	int ret;
 	int tmp;
···
 	if (ret)
 		goto err_out_format;
 
-	ret = rbd_dev_header_watch_sync(rbd_dev, 1);
-	if (ret)
-		goto out_header_name;
+	if (mapping) {
+		ret = rbd_dev_header_watch_sync(rbd_dev, true);
+		if (ret)
+			goto out_header_name;
+	}
 
 	if (rbd_dev->image_format == 1)
-		ret = rbd_dev_v1_probe(rbd_dev);
+		ret = rbd_dev_v1_header_info(rbd_dev);
 	else
-		ret = rbd_dev_v2_probe(rbd_dev);
+		ret = rbd_dev_v2_header_info(rbd_dev);
 	if (ret)
 		goto err_out_watch;
 
···
 		goto err_out_probe;
 
 	ret = rbd_dev_probe_parent(rbd_dev);
-	if (!ret)
-		return 0;
+	if (ret)
+		goto err_out_probe;
 
+	dout("discovered format %u image, header name is %s\n",
+		rbd_dev->image_format, rbd_dev->header_name);
+
+	return 0;
 err_out_probe:
 	rbd_dev_unprobe(rbd_dev);
 err_out_watch:
-	tmp = rbd_dev_header_watch_sync(rbd_dev, 0);
-	if (tmp)
-		rbd_warn(rbd_dev, "unable to tear down watch request\n");
+	if (mapping) {
+		tmp = rbd_dev_header_watch_sync(rbd_dev, false);
+		if (tmp)
+			rbd_warn(rbd_dev, "unable to tear down "
+					"watch request (%d)\n", tmp);
+	}
 out_header_name:
 	kfree(rbd_dev->header_name);
 	rbd_dev->header_name = NULL;
···
 	struct rbd_spec *spec = NULL;
 	struct rbd_client *rbdc;
 	struct ceph_osd_client *osdc;
+	bool read_only;
 	int rc = -ENOMEM;
 
 	if (!try_module_get(THIS_MODULE))
···
 	rc = rbd_add_parse_args(buf, &ceph_opts, &rbd_opts, &spec);
 	if (rc < 0)
 		goto err_out_module;
+	read_only = rbd_opts->read_only;
+	kfree(rbd_opts);
+	rbd_opts = NULL;	/* done with this */
 
 	rbdc = rbd_get_client(ceph_opts);
 	if (IS_ERR(rbdc)) {
···
 	rbdc = NULL;		/* rbd_dev now owns this */
 	spec = NULL;		/* rbd_dev now owns this */
 
-	rbd_dev->mapping.read_only = rbd_opts->read_only;
-	kfree(rbd_opts);
-	rbd_opts = NULL;	/* done with this */
-
-	rc = rbd_dev_image_probe(rbd_dev);
+	rc = rbd_dev_image_probe(rbd_dev, true);
 	if (rc < 0)
 		goto err_out_rbd_dev;
+
+	/* If we are mapping a snapshot it must be marked read-only */
+
+	if (rbd_dev->spec->snap_id != CEPH_NOSNAP)
+		read_only = true;
+	rbd_dev->mapping.read_only = read_only;
 
 	rc = rbd_dev_device_setup(rbd_dev);
 	if (!rc)
···
 
 	rbd_free_disk(rbd_dev);
 	clear_bit(RBD_DEV_FLAG_EXISTS, &rbd_dev->flags);
-	rbd_dev_clear_mapping(rbd_dev);
+	rbd_dev_mapping_clear(rbd_dev);
 	unregister_blkdev(rbd_dev->major, rbd_dev->name);
 	rbd_dev->major = 0;
 	rbd_dev_id_put(rbd_dev);
···
 	spin_unlock_irq(&rbd_dev->lock);
 	if (ret < 0)
 		goto done;
-	ret = count;
 	rbd_bus_del_dev(rbd_dev);
+	ret = rbd_dev_header_watch_sync(rbd_dev, false);
+	if (ret)
+		rbd_warn(rbd_dev, "failed to cancel watch event (%d)\n", ret);
 	rbd_dev_image_release(rbd_dev);
 	module_put(THIS_MODULE);
+	ret = count;
 done:
 	mutex_unlock(&ctl_mutex);
 

drivers/char/hw_random/mxc-rnga.c

···
 	clk_prepare_enable(mxc_rng->clk);
 
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (!res) {
-		err = -ENOENT;
-		goto err_region;
-	}
-
 	mxc_rng->mem = devm_ioremap_resource(&pdev->dev, res);
 	if (IS_ERR(mxc_rng->mem)) {
 		err = PTR_ERR(mxc_rng->mem);
···
 	return 0;
 
 err_ioremap:
-err_region:
 	clk_disable_unprepare(mxc_rng->clk);
 
 out:

drivers/char/hw_random/omap-rng.c

···
 	dev_set_drvdata(&pdev->dev, priv);
 
 	priv->mem_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (!priv->mem_res) {
-		ret = -ENOENT;
-		goto err_ioremap;
-	}
-
 	priv->base = devm_ioremap_resource(&pdev->dev, priv->mem_res);
 	if (IS_ERR(priv->base)) {
 		ret = PTR_ERR(priv->base);

drivers/char/ipmi/ipmi_bt_sm.c

···
 	enum bt_states	state;
 	unsigned char	seq;		/* BT sequence number */
 	struct si_sm_io	*io;
-	unsigned char	write_data[IPMI_MAX_MSG_LENGTH];
+	unsigned char	write_data[IPMI_MAX_MSG_LENGTH + 2]; /* +2 for memcpy */
 	int		write_count;
-	unsigned char	read_data[IPMI_MAX_MSG_LENGTH];
+	unsigned char	read_data[IPMI_MAX_MSG_LENGTH + 2]; /* +2 for memcpy */
 	int		read_count;
 	int		truncated;
 	long		timeout;	/* microseconds countdown */

drivers/char/ipmi/ipmi_devintf.c

···
 		return ipmi_ioctl(filep, cmd, arg);
 	}
 }
+
+static long unlocked_compat_ipmi_ioctl(struct file *filep, unsigned int cmd,
+				       unsigned long arg)
+{
+	int ret;
+
+	mutex_lock(&ipmi_mutex);
+	ret = compat_ipmi_ioctl(filep, cmd, arg);
+	mutex_unlock(&ipmi_mutex);
+
+	return ret;
+}
 #endif
 
 static const struct file_operations ipmi_fops = {
 	.owner		= THIS_MODULE,
 	.unlocked_ioctl	= ipmi_unlocked_ioctl,
 #ifdef CONFIG_COMPAT
-	.compat_ioctl   = compat_ipmi_ioctl,
+	.compat_ioctl   = unlocked_compat_ipmi_ioctl,
 #endif
 	.open		= ipmi_open,
 	.release	= ipmi_release,

drivers/char/ipmi/ipmi_msghandler.c

···
 	entry = kmalloc(sizeof(*entry), GFP_KERNEL);
 	if (!entry)
 		return -ENOMEM;
-	entry->name = kmalloc(strlen(name)+1, GFP_KERNEL);
+	entry->name = kstrdup(name, GFP_KERNEL);
 	if (!entry->name) {
 		kfree(entry);
 		return -ENOMEM;
 	}
-	strcpy(entry->name, name);
 
 	file = proc_create_data(name, 0, smi->proc_dir, proc_ops, data);
 	if (!file) {

drivers/char/ipmi/ipmi_si_intf.c

···
 		/* We got the flags from the SMI, now handle them. */
 		smi_info->handlers->get_result(smi_info->si_sm, msg, 4);
 		if (msg[2] != 0) {
-			dev_warn(smi_info->dev, "Could not enable interrupts"
-				 ", failed get, using polled mode.\n");
+			dev_warn(smi_info->dev,
+				 "Couldn't get irq info: %x.\n", msg[2]);
+			dev_warn(smi_info->dev,
+				 "Maybe ok, but ipmi might run very slowly.\n");
 			smi_info->si_state = SI_NORMAL;
 		} else {
 			msg[0] = (IPMI_NETFN_APP_REQUEST << 2);
···
 
 		/* We got the flags from the SMI, now handle them. */
 		smi_info->handlers->get_result(smi_info->si_sm, msg, 4);
-		if (msg[2] != 0)
-			dev_warn(smi_info->dev, "Could not enable interrupts"
-				 ", failed set, using polled mode.\n");
-		else
+		if (msg[2] != 0) {
+			dev_warn(smi_info->dev,
+				 "Couldn't set irq info: %x.\n", msg[2]);
+			dev_warn(smi_info->dev,
+				 "Maybe ok, but ipmi might run very slowly.\n");
+		} else
 			smi_info->interrupt_disabled = 0;
 		smi_info->si_state = SI_NORMAL;
 		break;

drivers/cpufreq/Kconfig

···
 
 choice
 	prompt "Default CPUFreq governor"
-	default CPU_FREQ_DEFAULT_GOV_USERSPACE if CPU_FREQ_SA1100 || CPU_FREQ_SA1110
+	default CPU_FREQ_DEFAULT_GOV_USERSPACE if ARM_SA1100_CPUFREQ || ARM_SA1110_CPUFREQ
 	default CPU_FREQ_DEFAULT_GOV_PERFORMANCE
 	help
 	  This option sets which CPUFreq governor shall be loaded at

drivers/cpufreq/Kconfig.arm

···
 #
 
 config ARM_BIG_LITTLE_CPUFREQ
-	tristate
-	depends on ARM_CPU_TOPOLOGY
+	tristate "Generic ARM big LITTLE CPUfreq driver"
+	depends on ARM_CPU_TOPOLOGY && PM_OPP && HAVE_CLK
+	help
+	  This enables the Generic CPUfreq driver for ARM big.LITTLE platforms.
 
 config ARM_DT_BL_CPUFREQ
-	tristate "Generic ARM big LITTLE CPUfreq driver probed via DT"
-	select ARM_BIG_LITTLE_CPUFREQ
-	depends on OF && HAVE_CLK
+	tristate "Generic probing via DT for ARM big LITTLE CPUfreq driver"
+	depends on ARM_BIG_LITTLE_CPUFREQ && OF
 	help
-	  This enables the Generic CPUfreq driver for ARM big.LITTLE platform.
-	  This gets frequency tables from DT.
+	  This enables probing via DT for Generic CPUfreq driver for ARM
+	  big.LITTLE platform. This gets frequency tables from DT.
 
 config ARM_EXYNOS_CPUFREQ
 	bool "SAMSUNG EXYNOS SoCs"

drivers/cpufreq/arm_big_little.c

···
 static struct cpufreq_frequency_table *freq_table[MAX_CLUSTERS];
 static atomic_t cluster_usage[MAX_CLUSTERS] = {ATOMIC_INIT(0), ATOMIC_INIT(0)};
 
-static int cpu_to_cluster(int cpu)
-{
-	return topology_physical_package_id(cpu);
-}
-
 static unsigned int bL_cpufreq_get(unsigned int cpu)
 {
 	u32 cur_cluster = cpu_to_cluster(cpu);
···
 
 	cpumask_copy(policy->cpus, topology_core_cpumask(policy->cpu));
 
-	dev_info(cpu_dev, "CPU %d initialized\n", policy->cpu);
+	dev_info(cpu_dev, "%s: CPU %d initialized\n", __func__, policy->cpu);
 	return 0;
 }
 

drivers/cpufreq/arm_big_little.h

···
 	int (*init_opp_table)(struct device *cpu_dev);
 };
 
+static inline int cpu_to_cluster(int cpu)
+{
+	return topology_physical_package_id(cpu);
+}
+
 int bL_cpufreq_register(struct cpufreq_arm_bL_ops *ops);
 void bL_cpufreq_unregister(struct cpufreq_arm_bL_ops *ops);
 

drivers/cpufreq/arm_big_little_dt.c

···
 
 	parent = of_find_node_by_path("/cpus");
 	if (!parent) {
-		pr_err("failed to find OF /cpus\n");
-		return -ENOENT;
+		pr_info("Failed to find OF /cpus. Use CPUFREQ_ETERNAL transition latency\n");
+		return CPUFREQ_ETERNAL;
 	}
 
 	for_each_child_of_node(parent, np) {
···
 		of_node_put(np);
 		of_node_put(parent);
 
-		return 0;
+		return transition_latency;
 	}
 
-	return -ENODEV;
+	pr_info("clock-latency isn't found, use CPUFREQ_ETERNAL transition latency\n");
+	return CPUFREQ_ETERNAL;
 }
 
 static struct cpufreq_arm_bL_ops dt_bL_ops = {

drivers/cpufreq/cpufreq-cpu0.c

···
 
 	if (!np) {
 		pr_err("failed to find cpu0 node\n");
-		return -ENOENT;
+		ret = -ENOENT;
+		goto out_put_parent;
 	}
 
 	cpu_dev = &pdev->dev;
 	cpu_dev->of_node = np;
+
+	cpu_reg = devm_regulator_get(cpu_dev, "cpu0");
+	if (IS_ERR(cpu_reg)) {
+		/*
+		 * If cpu0 regulator supply node is present, but regulator is
+		 * not yet registered, we should try defering probe.
+		 */
+		if (PTR_ERR(cpu_reg) == -EPROBE_DEFER) {
+			dev_err(cpu_dev, "cpu0 regulator not ready, retry\n");
+			ret = -EPROBE_DEFER;
+			goto out_put_node;
+		}
+		pr_warn("failed to get cpu0 regulator: %ld\n",
+			PTR_ERR(cpu_reg));
+		cpu_reg = NULL;
+	}
 
 	cpu_clk = devm_clk_get(cpu_dev, NULL);
 	if (IS_ERR(cpu_clk)) {
 		ret = PTR_ERR(cpu_clk);
 		pr_err("failed to get cpu0 clock: %d\n", ret);
 		goto out_put_node;
-	}
-
-	cpu_reg = devm_regulator_get(cpu_dev, "cpu0");
-	if (IS_ERR(cpu_reg)) {
-		pr_warn("failed to get cpu0 regulator\n");
-		cpu_reg = NULL;
 	}
 
 	ret = of_init_opp_table(cpu_dev);
···
 	opp_free_cpufreq_table(cpu_dev, &freq_table);
 out_put_node:
 	of_node_put(np);
+out_put_parent:
+	of_node_put(parent);
 	return ret;
 }
 

drivers/cpufreq/cpufreq.c

···
 				__func__, cpu_dev->id, cpu);
 	}
 
+	if ((cpus == 1) && (cpufreq_driver->target))
+		__cpufreq_governor(data, CPUFREQ_GOV_POLICY_EXIT);
+
 	pr_debug("%s: removing link, cpu: %d\n", __func__, cpu);
 	cpufreq_cpu_put(data);
 
 	/* If cpu is last user of policy, free policy */
 	if (cpus == 1) {
-		if (cpufreq_driver->target)
-			__cpufreq_governor(data, CPUFREQ_GOV_POLICY_EXIT);
-
 		lock_policy_rwsem_read(cpu);
 		kobj = &data->kobj;
 		cmp = &data->kobj_unregister;
···
 	if (dev) {
 		switch (action) {
 		case CPU_ONLINE:
-		case CPU_ONLINE_FROZEN:
 			cpufreq_add_dev(dev, NULL);
 			break;
 		case CPU_DOWN_PREPARE:
-		case CPU_DOWN_PREPARE_FROZEN:
+		case CPU_UP_CANCELED_FROZEN:
 			__cpufreq_remove_dev(dev, NULL);
 			break;
 		case CPU_DOWN_FAILED:
-		case CPU_DOWN_FAILED_FROZEN:
 			cpufreq_add_dev(dev, NULL);
 			break;
 		}

drivers/cpufreq/cpufreq_governor.c

···
 		if (have_governor_per_policy()) {
 			WARN_ON(dbs_data);
 		} else if (dbs_data) {
+			dbs_data->usage_count++;
 			policy->governor_data = dbs_data;
 			return 0;
 		}
···
 		}
 
 		dbs_data->cdata = cdata;
+		dbs_data->usage_count = 1;
 		rc = cdata->init(dbs_data);
 		if (rc) {
 			pr_err("%s: POLICY_INIT: init() failed\n", __func__);
···
 		set_sampling_rate(dbs_data, max(dbs_data->min_sampling_rate,
 					latency * LATENCY_MULTIPLIER));
 
-		if (dbs_data->cdata->governor == GOV_CONSERVATIVE) {
+		if ((cdata->governor == GOV_CONSERVATIVE) &&
+				(!policy->governor->initialized)) {
 			struct cs_ops *cs_ops = dbs_data->cdata->gov_ops;
 
 			cpufreq_register_notifier(cs_ops->notifier_block,
···
 
 		return 0;
 	case CPUFREQ_GOV_POLICY_EXIT:
-		if ((policy->governor->initialized == 1) ||
-				have_governor_per_policy()) {
+		if (!--dbs_data->usage_count) {
 			sysfs_remove_group(get_governor_parent_kobj(policy),
 					get_sysfs_attr(dbs_data));
 
-			if (dbs_data->cdata->governor == GOV_CONSERVATIVE) {
+			if ((dbs_data->cdata->governor == GOV_CONSERVATIVE) &&
+				(policy->governor->initialized == 1)) {
 				struct cs_ops *cs_ops = dbs_data->cdata->gov_ops;
 
 				cpufreq_unregister_notifier(cs_ops->notifier_block,

drivers/cpufreq/cpufreq_governor.h

···
 struct dbs_data {
 	struct common_dbs_data *cdata;
 	unsigned int min_sampling_rate;
+	int usage_count;
 	void *tuners;
 
 	/* dbs_mutex protects dbs_enable in governor start/stop */

drivers/cpufreq/cpufreq_ondemand.c

···
 	tuners->io_is_busy = should_io_be_busy();
 
 	dbs_data->tuners = tuners;
-	pr_info("%s: tuners %p\n", __func__, tuners);
 	mutex_init(&dbs_data->mutex);
 	return 0;
 }

drivers/cpufreq/cpufreq_stats.c

···
 
 	switch (action) {
 	case CPU_ONLINE:
-	case CPU_ONLINE_FROZEN:
 		cpufreq_update_policy(cpu);
 		break;
 	case CPU_DOWN_PREPARE:
-	case CPU_DOWN_PREPARE_FROZEN:
 		cpufreq_stats_free_sysfs(cpu);
 		break;
 	case CPU_DEAD:
-	case CPU_DEAD_FROZEN:
+		cpufreq_stats_free_table(cpu);
+		break;
+	case CPU_UP_CANCELED_FROZEN:
+		cpufreq_stats_free_sysfs(cpu);
 		cpufreq_stats_free_table(cpu);
 		break;
 	}

drivers/cpufreq/intel_pstate.c

···
 }
 
 struct sample {
-	ktime_t start_time;
-	ktime_t end_time;
 	int core_pct_busy;
-	int pstate_pct_busy;
-	u64 duration_us;
-	u64 idletime_us;
 	u64 aperf;
 	u64 mperf;
 	int freq;
···
 	struct pstate_adjust_policy *pstate_policy;
 	struct pstate_data pstate;
 	struct _pid pid;
-	struct _pid idle_pid;
 
 	int min_pstate_count;
-	int idle_mode;
 
-	ktime_t prev_sample;
-	u64	prev_idle_time_us;
 	u64	prev_aperf;
 	u64	prev_mperf;
 	int	sample_ptr;
···
 	int min_perf_pct;
 	int32_t max_perf;
 	int32_t min_perf;
+	int max_policy_pct;
+	int max_sysfs_pct;
 };
 
 static struct perf_limits limits = {
···
 	.max_perf = int_tofp(1),
 	.min_perf_pct = 0,
 	.min_perf = 0,
+	.max_policy_pct = 100,
+	.max_sysfs_pct = 100,
 };
 
 static inline void pid_reset(struct _pid *pid, int setpoint, int busy,
···
 	pid_reset(&cpu->pid,
 		cpu->pstate_policy->setpoint,
 		100,
-		cpu->pstate_policy->deadband,
-		0);
-}
-
-static inline void intel_pstate_idle_pid_reset(struct cpudata *cpu)
-{
-	pid_p_gain_set(&cpu->idle_pid, cpu->pstate_policy->p_gain_pct);
-	pid_d_gain_set(&cpu->idle_pid, cpu->pstate_policy->d_gain_pct);
-	pid_i_gain_set(&cpu->idle_pid, cpu->pstate_policy->i_gain_pct);
-
-	pid_reset(&cpu->idle_pid,
-		75,
-		50,
 		cpu->pstate_policy->deadband,
 		0);
 }
···
 	if (ret != 1)
 		return -EINVAL;
 
-	limits.max_perf_pct = clamp_t(int, input, 0 , 100);
+	limits.max_sysfs_pct = clamp_t(int, input, 0 , 100);
+	limits.max_perf_pct = min(limits.max_policy_pct, limits.max_sysfs_pct);
 	limits.max_perf = div_fp(int_tofp(limits.max_perf_pct), int_tofp(100));
 	return count;
 }
···
 	if (pstate == cpu->pstate.current_pstate)
 		return;
 
-#ifndef MODULE
 	trace_cpu_frequency(pstate * 100000, cpu->cpu);
-#endif
+
 	cpu->pstate.current_pstate = pstate;
 	wrmsrl(MSR_IA32_PERF_CTL, pstate << 8);
 
···
 					struct sample *sample)
 {
 	u64 core_pct;
-	sample->pstate_pct_busy = 100 - div64_u64(
-					sample->idletime_us * 100,
-					sample->duration_us);
 	core_pct = div64_u64(sample->aperf * 100, sample->mperf);
 	sample->freq = cpu->pstate.max_pstate * core_pct * 1000;
 
-	sample->core_pct_busy = div_s64((sample->pstate_pct_busy * core_pct),
-					100);
+	sample->core_pct_busy = core_pct;
 }
 
 static inline void intel_pstate_sample(struct cpudata *cpu)
 {
-	ktime_t now;
-	u64 idle_time_us;
 	u64 aperf, mperf;
-
-	now = ktime_get();
-	idle_time_us = get_cpu_idle_time_us(cpu->cpu, NULL);
 
 	rdmsrl(MSR_IA32_APERF, aperf);
 	rdmsrl(MSR_IA32_MPERF, mperf);
-	/* for the first sample, don't actually record a sample, just
-	 * set the baseline */
-	if (cpu->prev_idle_time_us > 0) {
-		cpu->sample_ptr = (cpu->sample_ptr + 1) % SAMPLE_COUNT;
-		cpu->samples[cpu->sample_ptr].start_time = cpu->prev_sample;
-		cpu->samples[cpu->sample_ptr].end_time = now;
-		cpu->samples[cpu->sample_ptr].duration_us =
-			ktime_us_delta(now, cpu->prev_sample);
-		cpu->samples[cpu->sample_ptr].idletime_us =
-			idle_time_us - cpu->prev_idle_time_us;
+	cpu->sample_ptr = (cpu->sample_ptr + 1) % SAMPLE_COUNT;
+	cpu->samples[cpu->sample_ptr].aperf = aperf;
+	cpu->samples[cpu->sample_ptr].mperf = mperf;
+	cpu->samples[cpu->sample_ptr].aperf -= cpu->prev_aperf;
+	cpu->samples[cpu->sample_ptr].mperf -= cpu->prev_mperf;
 
-		cpu->samples[cpu->sample_ptr].aperf = aperf;
-		cpu->samples[cpu->sample_ptr].mperf = mperf;
-		cpu->samples[cpu->sample_ptr].aperf -= cpu->prev_aperf;
-		cpu->samples[cpu->sample_ptr].mperf -= cpu->prev_mperf;
+	intel_pstate_calc_busy(cpu, &cpu->samples[cpu->sample_ptr]);
 
-		intel_pstate_calc_busy(cpu, &cpu->samples[cpu->sample_ptr]);
-	}
-
-	cpu->prev_sample = now;
-	cpu->prev_idle_time_us = idle_time_us;
 	cpu->prev_aperf = aperf;
 	cpu->prev_mperf = mperf;
 }
···
 	sample_time = cpu->pstate_policy->sample_rate_ms;
 	delay = msecs_to_jiffies(sample_time);
 	mod_timer_pinned(&cpu->timer, jiffies + delay);
-}
-
-static inline void intel_pstate_idle_mode(struct cpudata *cpu)
-{
-	cpu->idle_mode = 1;
-}
-
-static inline void intel_pstate_normal_mode(struct cpudata *cpu)
-{
-	cpu->idle_mode = 0;
 }
 
 static inline int intel_pstate_get_scaled_busy(struct cpudata *cpu)
···
 		intel_pstate_pstate_decrease(cpu, steps);
 }
 
-static inline void intel_pstate_adjust_idle_pstate(struct cpudata *cpu)
-{
-	int busy_scaled;
-	struct _pid *pid;
-	int ctl = 0;
-	int steps;
-
-	pid = &cpu->idle_pid;
-
-	busy_scaled = intel_pstate_get_scaled_busy(cpu);
-
-	ctl = pid_calc(pid, 100 - busy_scaled);
-
-	steps = abs(ctl);
-	if (ctl < 0)
-		intel_pstate_pstate_decrease(cpu, steps);
-	else
-		intel_pstate_pstate_increase(cpu, steps);
-
-	if (cpu->pstate.current_pstate == cpu->pstate.min_pstate)
-		intel_pstate_normal_mode(cpu);
-}
-
 static void intel_pstate_timer_func(unsigned long __data)
 {
 	struct cpudata *cpu = (struct cpudata *) __data;
 
 	intel_pstate_sample(cpu);
+	intel_pstate_adjust_busy_pstate(cpu);
 
-	if (!cpu->idle_mode)
-		intel_pstate_adjust_busy_pstate(cpu);
-	else
-		intel_pstate_adjust_idle_pstate(cpu);
-
-#if defined(XPERF_FIX)
 	if (cpu->pstate.current_pstate == cpu->pstate.min_pstate) {
 		cpu->min_pstate_count++;
 		if (!(cpu->min_pstate_count % 5)) {
 			intel_pstate_set_pstate(cpu, cpu->pstate.max_pstate);
-			intel_pstate_idle_mode(cpu);
 		}
 	} else
 		cpu->min_pstate_count = 0;
-#endif
+
 	intel_pstate_set_sample_time(cpu);
 }
 
···
 		(unsigned long)cpu;
 	cpu->timer.expires = jiffies + HZ/100;
 	intel_pstate_busy_pid_reset(cpu);
-	intel_pstate_idle_pid_reset(cpu);
 	intel_pstate_sample(cpu);
 	intel_pstate_set_pstate(cpu, cpu->pstate.max_pstate);
 
···
 	limits.min_perf_pct = clamp_t(int, limits.min_perf_pct, 0 , 100);
 	limits.min_perf = div_fp(int_tofp(limits.min_perf_pct), int_tofp(100));
 
-	limits.max_perf_pct = policy->max * 100 / policy->cpuinfo.max_freq;
-	limits.max_perf_pct = clamp_t(int, limits.max_perf_pct, 0 , 100);
+	limits.max_policy_pct = policy->max * 100 / policy->cpuinfo.max_freq;
+	limits.max_policy_pct = clamp_t(int, limits.max_policy_pct, 0 , 100);
+	limits.max_perf_pct = min(limits.max_policy_pct, limits.max_sysfs_pct);
 	limits.max_perf = div_fp(int_tofp(limits.max_perf_pct), int_tofp(100));
 
 	return 0;
···
 
 	pr_info("Intel P-state driver initializing.\n");
 
-	all_cpu_data = vmalloc(sizeof(void *) * num_possible_cpus());
+	all_cpu_data = vzalloc(sizeof(void *) * num_possible_cpus());
 	if (!all_cpu_data)
 		return -ENOMEM;
-	memset(all_cpu_data, 0, sizeof(void *) * num_possible_cpus());
 
 	rc = cpufreq_register_driver(&intel_pstate_driver);
 	if (rc)

drivers/cpufreq/kirkwood-cpufreq.c

···
 	priv.dev = &pdev->dev;
 
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (!res) {
-		dev_err(&pdev->dev, "Cannot get memory resource\n");
-		return -ENODEV;
-	}
 	priv.base = devm_ioremap_resource(&pdev->dev, res);
 	if (IS_ERR(priv.base))
 		return PTR_ERR(priv.base);

drivers/dma/tegra20-apb-dma.c

···
 	platform_set_drvdata(pdev, tdma);
 
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (!res) {
-		dev_err(&pdev->dev, "No mem resource for DMA\n");
-		return -EINVAL;
-	}
-
 	tdma->base_addr = devm_ioremap_resource(&pdev->dev, res);
 	if (IS_ERR(tdma->base_addr))
 		return PTR_ERR(tdma->base_addr);

drivers/gpio/gpio-mvebu.c

···
 	 * per-CPU registers */
 	if (soc_variant == MVEBU_GPIO_SOC_VARIANT_ARMADAXP) {
 		res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
-		if (!res) {
-			dev_err(&pdev->dev, "Cannot get memory resource\n");
-			return -ENODEV;
-		}
-
 		mvchip->percpu_membase = devm_ioremap_resource(&pdev->dev,
 							       res);
 		if (IS_ERR(mvchip->percpu_membase))

drivers/gpio/gpio-tegra.c

···
 	}
 
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (!res) {
-		dev_err(&pdev->dev, "Missing MEM resource\n");
-		return -ENODEV;
-	}
-
 	regs = devm_ioremap_resource(&pdev->dev, res);
 	if (IS_ERR(regs))
 		return PTR_ERR(regs);

drivers/gpu/drm/drm_crtc.c

···
 {
 	struct drm_crtc *crtc;
 
+	/* Locking is currently fubar in the panic handler. */
+	if (oops_in_progress)
+		return;
+
 	list_for_each_entry(crtc, &dev->mode_config.crtc_list, head)
 		WARN_ON(!mutex_is_locked(&crtc->mutex));
 
···
 	else
 		return "unknown";
 }
+EXPORT_SYMBOL(drm_get_connector_status_name);
 
 /**
  * drm_mode_object_get - allocate a new modeset identifier

drivers/gpu/drm/drm_crtc_helper.c

···
 		connector->helper_private;
 	int count = 0;
 	int mode_flags = 0;
+	bool verbose_prune = true;
 
 	DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n", connector->base.id,
 			drm_get_connector_name(connector));
···
 		DRM_DEBUG_KMS("[CONNECTOR:%d:%s] disconnected\n",
 			connector->base.id, drm_get_connector_name(connector));
 		drm_mode_connector_update_edid_property(connector, NULL);
+		verbose_prune = false;
 		goto prune;
 	}
 
···
 	}
 
 prune:
-	drm_mode_prune_invalid(dev, &connector->modes, true);
+	drm_mode_prune_invalid(dev, &connector->modes, verbose_prune);
 
 	if (list_empty(&connector->modes))
 		return 0;
···
 			continue;
 
 		connector->status = connector->funcs->detect(connector, false);
-		DRM_DEBUG_KMS("[CONNECTOR:%d:%s] status updated from %d to %d\n",
-			      connector->base.id,
-			      drm_get_connector_name(connector),
-			      old_status, connector->status);
-		if (old_status != connector->status)
+		if (old_status != connector->status) {
+			const char *old, *new;
+
+			old = drm_get_connector_status_name(old_status);
+			new = drm_get_connector_status_name(connector->status);
+
+			DRM_DEBUG_KMS("[CONNECTOR:%d:%s] "
+				      "status updated from %s to %s\n",
+				      connector->base.id,
+				      drm_get_connector_name(connector),
+				      old, new);
+
 			changed = true;
+		}
 	}
 
 	mutex_unlock(&dev->mode_config.mutex);
···
 		old_status = connector->status;
 
 		connector->status = connector->funcs->detect(connector, false);
-		DRM_DEBUG_KMS("[CONNECTOR:%d:%s] status updated from %d to %d\n",
+		DRM_DEBUG_KMS("[CONNECTOR:%d:%s] status updated from %s to %s\n",
 			      connector->base.id,
 			      drm_get_connector_name(connector),
-			      old_status, connector->status);
+			      drm_get_connector_status_name(old_status),
+			      drm_get_connector_status_name(connector->status));
 		if (old_status != connector->status)
 			changed = true;
 	}

drivers/gpu/drm/drm_drv.c

···
 		       struct drm_file *file_priv);
 
 #define DRM_IOCTL_DEF(ioctl, _func, _flags) \
-	[DRM_IOCTL_NR(ioctl)] = {.cmd = ioctl, .func = _func, .flags = _flags, .cmd_drv = 0}
+	[DRM_IOCTL_NR(ioctl)] = {.cmd = ioctl, .func = _func, .flags = _flags, .cmd_drv = 0, .name = #ioctl}
 
 /** Ioctl table */
 static const struct drm_ioctl_desc drm_ioctls[] = {
···
 {
 	struct drm_file *file_priv = filp->private_data;
 	struct drm_device *dev;
-	const struct drm_ioctl_desc *ioctl;
+	const struct drm_ioctl_desc *ioctl = NULL;
 	drm_ioctl_t *func;
 	unsigned int nr = DRM_IOCTL_NR(cmd);
 	int retcode = -EINVAL;
···
 	atomic_inc(&dev->ioctl_count);
 	atomic_inc(&dev->counts[_DRM_STAT_IOCTLS]);
 	++file_priv->ioctl_count;
-
-	DRM_DEBUG("pid=%d, cmd=0x%02x, nr=0x%02x, dev 0x%lx, auth=%d\n",
-		  task_pid_nr(current), cmd, nr,
-		  (long)old_encode_dev(file_priv->minor->device),
-		  file_priv->authenticated);
 
 	if ((nr >= DRM_CORE_IOCTL_COUNT) &&
 	    ((nr < DRM_COMMAND_BASE) || (nr >= DRM_COMMAND_END)))
···
 		usize = asize = _IOC_SIZE(cmd);
 	} else
 		goto err_i1;
+
+	DRM_DEBUG("pid=%d, dev=0x%lx, auth=%d, %s\n",
+		  task_pid_nr(current),
+		  (long)old_encode_dev(file_priv->minor->device),
+		  file_priv->authenticated, ioctl->name);
 
 	/* Do not trust userspace, use our own definition */
 	func = ioctl->func;
···
 	}
 
       err_i1:
+	if (!ioctl)
+		DRM_DEBUG("invalid iotcl: pid=%d, dev=0x%lx, auth=%d, cmd=0x%02x, nr=0x%02x\n",
+			  task_pid_nr(current),
+			  (long)old_encode_dev(file_priv->minor->device),
+			  file_priv->authenticated, cmd, nr);
+
 	if (kdata != stack_kdata)
 		kfree(kdata);
 	atomic_dec(&dev->ioctl_count);

drivers/gpu/drm/drm_encoder_slave.c

···
 			 struct i2c_adapter *adap,
 			 const struct i2c_board_info *info)
 {
-	char modalias[sizeof(I2C_MODULE_PREFIX)
-		      + I2C_NAME_SIZE];
 	struct module *module = NULL;
 	struct i2c_client *client;
 	struct drm_i2c_encoder_driver *encoder_drv;
 	int err = 0;
 
-	snprintf(modalias, sizeof(modalias),
-		 "%s%s", I2C_MODULE_PREFIX, info->type);
-	request_module(modalias);
+	request_module("%s%s", I2C_MODULE_PREFIX, info->type);
 
 	client = i2c_new_device(adap, info);
 	if (!client) {

drivers/gpu/drm/drm_mm.c

···
 EXPORT_SYMBOL(drm_mm_debug_table);
 
 #if defined(CONFIG_DEBUG_FS)
+static unsigned long drm_mm_dump_hole(struct seq_file *m, struct drm_mm_node *entry)
+{
+	unsigned long hole_start, hole_end, hole_size;
+
+	if (entry->hole_follows) {
+		hole_start = drm_mm_hole_node_start(entry);
+		hole_end = drm_mm_hole_node_end(entry);
+		hole_size = hole_end - hole_start;
+		seq_printf(m, "0x%08lx-0x%08lx: 0x%08lx: free\n",
+				hole_start, hole_end, hole_size);
+		return hole_size;
+	}
+
+	return 0;
+}
+
 int drm_mm_dump_table(struct seq_file *m, struct drm_mm *mm)
 {
 	struct drm_mm_node *entry;
 	unsigned long total_used = 0, total_free = 0, total = 0;
-	unsigned long hole_start, hole_end, hole_size;
 
-	hole_start = drm_mm_hole_node_start(&mm->head_node);
-	hole_end = drm_mm_hole_node_end(&mm->head_node);
-	hole_size = hole_end - hole_start;
-	if (hole_size)
-		seq_printf(m, "0x%08lx-0x%08lx: 0x%08lx: free\n",
-				hole_start, hole_end, hole_size);
-	total_free += hole_size;
+	total_free += drm_mm_dump_hole(m, &mm->head_node);
 
 	drm_mm_for_each_node(entry, mm) {
 		seq_printf(m, "0x%08lx-0x%08lx: 0x%08lx: used\n",
 				entry->start, entry->start + entry->size,
 				entry->size);
 		total_used += entry->size;
-		if (entry->hole_follows) {
-			hole_start = drm_mm_hole_node_start(entry);
-			hole_end = drm_mm_hole_node_end(entry);
-			hole_size = hole_end - hole_start;
-			seq_printf(m, "0x%08lx-0x%08lx: 0x%08lx: free\n",
-					hole_start, hole_end, hole_size);
-			total_free += hole_size;
-		}
+		total_free += drm_mm_dump_hole(m, entry);
 	}
 	total = total_free + total_used;
 

drivers/gpu/drm/drm_modes.c

···
 				was_digit = false;
 			} else
 				goto done;
+			break;
 		case '0' ... '9':
 			was_digit = true;
 			break;

drivers/gpu/drm/exynos/exynos_hdmi.c

···
 	}
 
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (!res) {
-		DRM_ERROR("failed to find registers\n");
-		return -ENOENT;
-	}
-
 	hdata->regs = devm_ioremap_resource(&pdev->dev, res);
 	if (IS_ERR(hdata->regs))
 		return PTR_ERR(hdata->regs);

drivers/gpu/drm/i915/i915_gem.c

···
 	if (timeout) {
 		struct timespec sleep_time = timespec_sub(now, before);
 		*timeout = timespec_sub(*timeout, sleep_time);
+		if (!timespec_valid(timeout)) /* i.e. negative time remains */
+			set_normalized_timespec(timeout, 0, 0);
 	}
 
 	switch (end) {
···
 	case -ERESTARTSYS: /* Signal */
 		return (int)end;
 	case 0: /* Timeout */
-		if (timeout)
-			set_normalized_timespec(timeout, 0, 0);
 		return -ETIME;
 	default: /* Completed */
 		WARN_ON(end < 0); /* We're not aware of other errors */
···
 	mutex_unlock(&dev->struct_mutex);
 
 	ret = __wait_seqno(ring, seqno, reset_counter, true, timeout);
-	if (timeout) {
-		WARN_ON(!timespec_valid(timeout));
+	if (timeout)
 		args->timeout_ns = timespec_to_ns(timeout);
-	}
 	return ret;
 
 out:

drivers/gpu/drm/i915/i915_gem_gtt.c

···
 	return snb_gmch_ctl << 25; /* 32 MB units */
 }
 
-static inline size_t gen7_get_stolen_size(u16 snb_gmch_ctl)
-{
-	static const int stolen_decoder[] = {
-		0, 0, 0, 0, 0, 32, 48, 64, 128, 256, 96, 160, 224, 352};
-	snb_gmch_ctl >>= IVB_GMCH_GMS_SHIFT;
-	snb_gmch_ctl &= IVB_GMCH_GMS_MASK;
-	return stolen_decoder[snb_gmch_ctl] << 20;
-}
-
 static int gen6_gmch_probe(struct drm_device *dev,
 			   size_t *gtt_total,
 			   size_t *stolen,
···
 	pci_read_config_word(dev->pdev, SNB_GMCH_CTRL, &snb_gmch_ctl);
 	gtt_size = gen6_get_total_gtt_size(snb_gmch_ctl);
 
-	if (IS_GEN7(dev) && !IS_VALLEYVIEW(dev))
-		*stolen = gen7_get_stolen_size(snb_gmch_ctl);
-	else
-		*stolen = gen6_get_stolen_size(snb_gmch_ctl);
-
+	*stolen = gen6_get_stolen_size(snb_gmch_ctl);
 	*gtt_total = (gtt_size / sizeof(gen6_gtt_pte_t)) << PAGE_SHIFT;
 
 	/* For Modern GENs the PTEs and register space are split in the BAR */

drivers/gpu/drm/i915/i915_reg.h

···
 #define    SNB_GMCH_GGMS_MASK	0x3
 #define    SNB_GMCH_GMS_SHIFT   3 /* Graphics Mode Select */
 #define    SNB_GMCH_GMS_MASK    0x1f
-#define    IVB_GMCH_GMS_SHIFT   4
-#define    IVB_GMCH_GMS_MASK    0xf
 
 
 /* PCI config space */

drivers/gpu/drm/i915/intel_ddi.c

···
 		intel_dp_sink_dpms(intel_dp, DRM_MODE_DPMS_ON);
 		intel_dp_start_link_train(intel_dp);
 		intel_dp_complete_link_train(intel_dp);
+		if (port != PORT_A)
+			intel_dp_stop_link_train(intel_dp);
 	}
 }
 
···
 			   intel_dig_port->port_reversal | DDI_BUF_CTL_ENABLE);
 	} else if (type == INTEL_OUTPUT_EDP) {
 		struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
+
+		if (port == PORT_A)
+			intel_dp_stop_link_train(intel_dp);
 
 		ironlake_edp_backlight_on(intel_dp);
 	}

drivers/gpu/drm/i915/intel_dp.c

···
 	/* Walk through all bpp values. Luckily they're all nicely spaced with 2
 	 * bpc in between. */
 	bpp = min_t(int, 8*3, pipe_config->pipe_bpp);
+	if (is_edp(intel_dp) && dev_priv->edp.bpp)
+		bpp = min_t(int, bpp, dev_priv->edp.bpp);
+
 	for (; bpp >= 6*3; bpp -= 2*3) {
 		mode_rate = intel_dp_link_required(target_clock, bpp);
 
···
 	intel_dp->link_bw = bws[clock];
 	intel_dp->lane_count = lane_count;
 	adjusted_mode->clock = drm_dp_bw_code_to_link_rate(intel_dp->link_bw);
+	pipe_config->pipe_bpp = bpp;
 	pipe_config->pixel_target_clock = target_clock;
 
 	DRM_DEBUG_KMS("DP link bw %02x lane count %d clock %d bpp %d\n",
···
 	intel_link_compute_m_n(bpp, lane_count,
 			       target_clock, adjusted_mode->clock,
 			       &pipe_config->dp_m_n);
-
-	/*
-	 * XXX: We have a strange regression where using the vbt edp bpp value
-	 * for the link bw computation results in black screens, the panel only
-	 * works when we do the computation at the usual 24bpp (but still
-	 * requires us to use 18bpp). Until that's fully debugged, stay
-	 * bug-for-bug compatible with the old code.
-	 */
-	if (is_edp(intel_dp) && dev_priv->edp.bpp) {
-		DRM_DEBUG_KMS("clamping display bpc (was %d) to eDP (%d)\n",
-			      bpp, dev_priv->edp.bpp);
-		bpp = min_t(int, bpp, dev_priv->edp.bpp);
-	}
-	pipe_config->pipe_bpp = bpp;
 
 	return true;
 }
···
 	ironlake_edp_panel_on(intel_dp);
 	ironlake_edp_panel_vdd_off(intel_dp, true);
 	intel_dp_complete_link_train(intel_dp);
+	intel_dp_stop_link_train(intel_dp);
 	ironlake_edp_backlight_on(intel_dp);
 }
 
···
 	struct drm_i915_private *dev_priv = dev->dev_private;
 	enum port port = intel_dig_port->port;
 	int ret;
-	uint32_t temp;
 
 	if (HAS_DDI(dev)) {
-		temp = I915_READ(DP_TP_CTL(port));
+		uint32_t temp = I915_READ(DP_TP_CTL(port));
 
 		if (dp_train_pat & DP_LINK_SCRAMBLING_DISABLE)
 			temp |= DP_TP_CTL_SCRAMBLE_DISABLE;
···
 		temp &= ~DP_TP_CTL_LINK_TRAIN_MASK;
 		switch (dp_train_pat & DP_TRAINING_PATTERN_MASK) {
 		case DP_TRAINING_PATTERN_DISABLE:
-
-			if (port != PORT_A) {
-				temp |= DP_TP_CTL_LINK_TRAIN_IDLE;
-				I915_WRITE(DP_TP_CTL(port), temp);
-
-				if (wait_for((I915_READ(DP_TP_STATUS(port)) &
-					      DP_TP_STATUS_IDLE_DONE), 1))
-					DRM_ERROR("Timed out waiting for DP idle patterns\n");
-
-				temp &= ~DP_TP_CTL_LINK_TRAIN_MASK;
-			}
-
 			temp |= DP_TP_CTL_LINK_TRAIN_NORMAL;
 
 			break;
···
 	}
 
 	return true;
+}
+
+static void intel_dp_set_idle_link_train(struct intel_dp *intel_dp)
+{
+	struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
+	struct drm_device *dev = intel_dig_port->base.base.dev;
+	struct drm_i915_private *dev_priv = dev->dev_private;
+	enum port port = intel_dig_port->port;
+	uint32_t val;
+
+	if (!HAS_DDI(dev))
+		return;
+
+	val = I915_READ(DP_TP_CTL(port));
+	val &= ~DP_TP_CTL_LINK_TRAIN_MASK;
+	val |= DP_TP_CTL_LINK_TRAIN_IDLE;
+	I915_WRITE(DP_TP_CTL(port), val);
+
+	/*
+	 * On PORT_A we can have only eDP in SST mode. There the only reason
+	 * we need to set idle transmission mode is to work around a HW issue
+	 * where we enable the pipe while not in idle link-training mode.
+	 * In this case there is requirement to wait for a minimum number of
+	 * idle patterns to be sent.
+	 */
+	if (port == PORT_A)
+		return;
+
+	if (wait_for((I915_READ(DP_TP_STATUS(port)) & DP_TP_STATUS_IDLE_DONE),
+		     1))
+		DRM_ERROR("Timed out waiting for DP idle patterns\n");
 }
 
 /* Enable corresponding port and start training pattern 1 */
···
 		++tries;
 	}
 
+	intel_dp_set_idle_link_train(intel_dp);
+
+	intel_dp->DP = DP;
+
 	if (channel_eq)
 		DRM_DEBUG_KMS("Channel EQ done. DP Training successful\n");
 
-	intel_dp_set_link_train(intel_dp, DP, DP_TRAINING_PATTERN_DISABLE);
+}
+
+void intel_dp_stop_link_train(struct intel_dp *intel_dp)
+{
+	intel_dp_set_link_train(intel_dp, intel_dp->DP,
+				DP_TRAINING_PATTERN_DISABLE);
 }
 
 static void
···
 			      drm_get_encoder_name(&intel_encoder->base));
 		intel_dp_start_link_train(intel_dp);
 		intel_dp_complete_link_train(intel_dp);
+		intel_dp_stop_link_train(intel_dp);
 	}
 }
 

drivers/gpu/drm/i915/intel_drv.h

···
 extern void intel_dp_init_link_config(struct intel_dp *intel_dp);
 extern void intel_dp_start_link_train(struct intel_dp *intel_dp);
 extern void intel_dp_complete_link_train(struct intel_dp *intel_dp);
+extern void intel_dp_stop_link_train(struct intel_dp *intel_dp);
 extern void intel_dp_sink_dpms(struct intel_dp *intel_dp, int mode);
 extern void intel_dp_encoder_destroy(struct drm_encoder *encoder);
 extern void intel_dp_check_link_status(struct intel_dp *intel_dp);

drivers/gpu/drm/i915/intel_fb.c

···
 void intel_fbdev_set_suspend(struct drm_device *dev, int state)
 {
 	drm_i915_private_t *dev_priv = dev->dev_private;
-	if (!dev_priv->fbdev)
+	struct intel_fbdev *ifbdev = dev_priv->fbdev;
+	struct fb_info *info;
+
+	if (!ifbdev)
 		return;
 
-	fb_set_suspend(dev_priv->fbdev->helper.fbdev, state);
+	info = ifbdev->helper.fbdev;
+
+	/* On resume from hibernation: If the object is shmemfs backed, it has
+	 * been restored from swap. If the object is stolen however, it will be
+	 * full of whatever garbage was left in there.
+	 */
+	if (!state && ifbdev->ifb.obj->stolen)
+		memset_io(info->screen_base, 0, info->screen_size);
+
+	fb_set_suspend(info, state);
 }
 
 MODULE_LICENSE("GPL and additional rights");

drivers/gpu/drm/i915/intel_pm.c

···
 
 	vlv_update_drain_latency(dev);
 
-	if (g4x_compute_wm0(dev, 0,
+	if (g4x_compute_wm0(dev, PIPE_A,
 			    &valleyview_wm_info, latency_ns,
 			    &valleyview_cursor_wm_info, latency_ns,
 			    &planea_wm, &cursora_wm))
-		enabled |= 1;
+		enabled |= 1 << PIPE_A;
 
-	if (g4x_compute_wm0(dev, 1,
+	if (g4x_compute_wm0(dev, PIPE_B,
 			    &valleyview_wm_info, latency_ns,
 			    &valleyview_cursor_wm_info, latency_ns,
 			    &planeb_wm, &cursorb_wm))
-		enabled |= 2;
+		enabled |= 1 << PIPE_B;
 
 	if (single_plane_enabled(enabled) &&
 	    g4x_compute_srwm(dev, ffs(enabled) - 1,
···
 	int plane_sr, cursor_sr;
 	unsigned int enabled = 0;
 
-	if (g4x_compute_wm0(dev, 0,
+	if (g4x_compute_wm0(dev, PIPE_A,
 			    &g4x_wm_info, latency_ns,
 			    &g4x_cursor_wm_info, latency_ns,
 			    &planea_wm, &cursora_wm))
-		enabled |= 1;
+		enabled |= 1 << PIPE_A;
 
-	if (g4x_compute_wm0(dev, 1,
+	if (g4x_compute_wm0(dev, PIPE_B,
 			    &g4x_wm_info, latency_ns,
 			    &g4x_cursor_wm_info, latency_ns,
 			    &planeb_wm, &cursorb_wm))
-		enabled |= 2;
+		enabled |= 1 << PIPE_B;
 
 	if (single_plane_enabled(enabled) &&
 	    g4x_compute_srwm(dev, ffs(enabled) - 1,
···
 	unsigned int enabled;
 
 	enabled = 0;
-	if (g4x_compute_wm0(dev, 0,
+	if (g4x_compute_wm0(dev, PIPE_A,
 			    &ironlake_display_wm_info,
 			    ILK_LP0_PLANE_LATENCY,
 			    &ironlake_cursor_wm_info,
···
 		DRM_DEBUG_KMS("FIFO watermarks For pipe A -"
 			      " plane %d, " "cursor: %d\n",
 			      plane_wm, cursor_wm);
-		enabled |= 1;
+		enabled |= 1 << PIPE_A;
 	}
 
-	if (g4x_compute_wm0(dev, 1,
+	if (g4x_compute_wm0(dev, PIPE_B,
 			    &ironlake_display_wm_info,
 			    ILK_LP0_PLANE_LATENCY,
 			    &ironlake_cursor_wm_info,
···
 		DRM_DEBUG_KMS("FIFO watermarks For pipe B -"
 			      " plane %d, cursor: %d\n",
 			      plane_wm, cursor_wm);
-		enabled |= 2;
+		enabled |= 1 << PIPE_B;
 	}
 
 	/*
···
 	unsigned int enabled;
 
 	enabled = 0;
-	if (g4x_compute_wm0(dev, 0,
+	if (g4x_compute_wm0(dev, PIPE_A,
 			    &sandybridge_display_wm_info, latency,
 			    &sandybridge_cursor_wm_info, latency,
 			    &plane_wm, &cursor_wm)) {
···
 		DRM_DEBUG_KMS("FIFO watermarks For pipe A -"
 			      " plane %d, " "cursor: %d\n",
 			      plane_wm, cursor_wm);
-		enabled |= 1;
+		enabled |= 1 << PIPE_A;
 	}
 
-	if (g4x_compute_wm0(dev, 1,
+	if (g4x_compute_wm0(dev, PIPE_B,
 			    &sandybridge_display_wm_info, latency,
 			    &sandybridge_cursor_wm_info, latency,
 			    &plane_wm, &cursor_wm)) {
···
 		DRM_DEBUG_KMS("FIFO watermarks For pipe B -"
 			      " plane %d, cursor: %d\n",
 			      plane_wm, cursor_wm);
-		enabled |= 2;
+		enabled |= 1 << PIPE_B;
 	}
 
 	/*
···
 	unsigned int enabled;
 
 	enabled = 0;
-	if (g4x_compute_wm0(dev, 0,
+	if (g4x_compute_wm0(dev, PIPE_A,
 			    &sandybridge_display_wm_info, latency,
 			    &sandybridge_cursor_wm_info, latency,
 			    &plane_wm, &cursor_wm)) {
···
 		DRM_DEBUG_KMS("FIFO watermarks For pipe A -"
 			      " plane %d, " "cursor: %d\n",
 			      plane_wm, cursor_wm);
-		enabled |= 1;
+		enabled |= 1 << PIPE_A;
 	}
 
-	if (g4x_compute_wm0(dev, 1,
+	if (g4x_compute_wm0(dev, PIPE_B,
 			    &sandybridge_display_wm_info, latency,
 			    &sandybridge_cursor_wm_info, latency,
 			    &plane_wm, &cursor_wm)) {
···
 		DRM_DEBUG_KMS("FIFO watermarks For pipe B -"
 			      " plane %d, cursor: %d\n",
 			      plane_wm, cursor_wm);
-		enabled |= 2;
+		enabled |= 1 << PIPE_B;
 	}
 
-	if (g4x_compute_wm0(dev, 2,
+	if (g4x_compute_wm0(dev, PIPE_C,
 			    &sandybridge_display_wm_info, latency,
 			    &sandybridge_cursor_wm_info, latency,
 			    &plane_wm, &cursor_wm)) {
···
 		DRM_DEBUG_KMS("FIFO watermarks For pipe C -"
 			      " plane %d, cursor: %d\n",
 			      plane_wm, cursor_wm);
-		enabled |= 3;
+		enabled |= 1 << PIPE_C;
 	}
 
 	/*

drivers/gpu/drm/mgag200/mgag200_mode.c

···
 
 static inline void mga_wait_vsync(struct mga_device *mdev)
 {
-	unsigned int count = 0;
+	unsigned long timeout = jiffies + HZ/10;
 	unsigned int status = 0;
 
 	do {
 		status = RREG32(MGAREG_Status);
-		count++;
-	} while ((status & 0x08) && (count < 250000));
-	count = 0;
+	} while ((status & 0x08) && time_before(jiffies, timeout));
+	timeout = jiffies + HZ/10;
 	status = 0;
 	do {
 		status = RREG32(MGAREG_Status);
-		count++;
-	} while (!(status & 0x08) && (count < 250000));
+	} while (!(status & 0x08) && time_before(jiffies, timeout));
 }
 
 static inline void mga_wait_busy(struct mga_device *mdev)
 {
-	unsigned int count = 0;
+	unsigned long timeout = jiffies + HZ;
 	unsigned int status = 0;
 	do {
 		status = RREG8(MGAREG_Status + 2);
-		count++;
-	} while ((status & 0x01) && (count < 500000));
+	} while ((status & 0x01) && time_before(jiffies, timeout));
 }
 
 /*
···
 		WREG8(DAC_INDEX, MGA1064_PIX_CLK_CTL);
 		tmp = RREG8(DAC_DATA);
 		tmp |= MGA1064_PIX_CLK_CTL_CLK_DIS;
-		WREG_DAC(MGA1064_PIX_CLK_CTL_CLK_DIS, tmp);
+		WREG8(DAC_DATA, tmp);
 
 		WREG8(DAC_INDEX, MGA1064_REMHEADCTL);
 		tmp = RREG8(DAC_DATA);
 		tmp |= MGA1064_REMHEADCTL_CLKDIS;
-		WREG_DAC(MGA1064_REMHEADCTL, tmp);
+		WREG8(DAC_DATA, tmp);
 
 		/* select PLL Set C */
 		tmp = RREG8(MGAREG_MEM_MISC_READ);
···
 		WREG8(DAC_INDEX, MGA1064_PIX_CLK_CTL);
 		tmp = RREG8(DAC_DATA);
 		tmp |= MGA1064_PIX_CLK_CTL_CLK_POW_DOWN | 0x80;
-		WREG_DAC(MGA1064_PIX_CLK_CTL, tmp);
+		WREG8(DAC_DATA, tmp);
 
 		udelay(500);
 
···
 		WREG8(DAC_INDEX, MGA1064_VREF_CTL);
 		tmp = RREG8(DAC_DATA);
 		tmp &= ~0x04;
-		WREG_DAC(MGA1064_VREF_CTL, tmp);
+		WREG8(DAC_DATA, tmp);
 
 		udelay(50);
 
···
 		tmp = RREG8(DAC_DATA);
 		tmp &= ~MGA1064_PIX_CLK_CTL_SEL_MSK;
 		tmp |= MGA1064_PIX_CLK_CTL_SEL_PLL;
-		WREG_DAC(MGA1064_PIX_CLK_CTL, tmp);
+		WREG8(DAC_DATA, tmp);
 
 		WREG8(DAC_INDEX, MGA1064_REMHEADCTL);
 		tmp = RREG8(DAC_DATA);
 		tmp &= ~MGA1064_REMHEADCTL_CLKSL_MSK;
 		tmp |= MGA1064_REMHEADCTL_CLKSL_PLL;
-		WREG_DAC(MGA1064_REMHEADCTL, tmp);
+		WREG8(DAC_DATA, tmp);
 
 		/* reset dotclock rate bit */
 		WREG8(MGAREG_SEQ_INDEX, 1);
···
 		WREG8(DAC_INDEX, MGA1064_PIX_CLK_CTL);
 		tmp = RREG8(DAC_DATA);
 		tmp &= ~MGA1064_PIX_CLK_CTL_CLK_DIS;
-		WREG_DAC(MGA1064_PIX_CLK_CTL, tmp);
+		WREG8(DAC_DATA, tmp);
 
 		vcount = RREG8(MGAREG_VCOUNT);
 
···
 	WREG8(DAC_INDEX, MGA1064_PIX_CLK_CTL);
 	tmp = RREG8(DAC_DATA);
 	tmp |= MGA1064_PIX_CLK_CTL_CLK_DIS;
-	WREG_DAC(MGA1064_PIX_CLK_CTL_CLK_DIS, tmp);
+	WREG8(DAC_DATA, tmp);
 
 	tmp = RREG8(MGAREG_MEM_MISC_READ);
 	tmp |= 0x3 << 2;
···
 
 	WREG8(DAC_INDEX, MGA1064_PIX_PLL_STAT);
 	tmp = RREG8(DAC_DATA);
-	WREG_DAC(MGA1064_PIX_PLL_STAT, tmp & ~0x40);
+	WREG8(DAC_DATA, tmp & ~0x40);
 
 	WREG8(DAC_INDEX, MGA1064_PIX_CLK_CTL);
 	tmp = RREG8(DAC_DATA);
 	tmp |= MGA1064_PIX_CLK_CTL_CLK_POW_DOWN;
-	WREG_DAC(MGA1064_PIX_CLK_CTL, tmp);
+	WREG8(DAC_DATA, tmp);
 
 	WREG_DAC(MGA1064_EV_PIX_PLLC_M, m);
 	WREG_DAC(MGA1064_EV_PIX_PLLC_N, n);
···
 	WREG8(DAC_INDEX, MGA1064_PIX_CLK_CTL);
 	tmp = RREG8(DAC_DATA);
 	tmp &= ~MGA1064_PIX_CLK_CTL_CLK_POW_DOWN;
-	WREG_DAC(MGA1064_PIX_CLK_CTL, tmp);
+	WREG8(DAC_DATA, tmp);
 
 	udelay(500);
 
···
 	tmp = RREG8(DAC_DATA);
 	tmp &= ~MGA1064_PIX_CLK_CTL_SEL_MSK;
 	tmp |= MGA1064_PIX_CLK_CTL_SEL_PLL;
-	WREG_DAC(MGA1064_PIX_CLK_CTL, tmp);
+	WREG8(DAC_DATA, tmp);
 
 	WREG8(DAC_INDEX, MGA1064_PIX_PLL_STAT);
 	tmp = RREG8(DAC_DATA);
-	WREG_DAC(MGA1064_PIX_PLL_STAT, tmp | 0x40);
+	WREG8(DAC_DATA, tmp | 0x40);
 
 	tmp = RREG8(MGAREG_MEM_MISC_READ);
 	tmp |= (0x3 << 2);
···
 	WREG8(DAC_INDEX, MGA1064_PIX_CLK_CTL);
 	tmp = RREG8(DAC_DATA);
 	tmp &= ~MGA1064_PIX_CLK_CTL_CLK_DIS;
-	WREG_DAC(MGA1064_PIX_CLK_CTL, tmp);
+	WREG8(DAC_DATA, tmp);
 
 	return 0;
 }
···
 		WREG8(DAC_INDEX, MGA1064_PIX_CLK_CTL);
 		tmp = RREG8(DAC_DATA);
 		tmp |= MGA1064_PIX_CLK_CTL_CLK_DIS;
-		WREG_DAC(MGA1064_PIX_CLK_CTL_CLK_DIS, tmp);
+		WREG8(DAC_DATA, tmp);
 
 		tmp = RREG8(MGAREG_MEM_MISC_READ);
 		tmp |= 0x3 << 2;
···
 		WREG8(DAC_INDEX, MGA1064_PIX_CLK_CTL);
 		tmp = RREG8(DAC_DATA);
 		tmp |= MGA1064_PIX_CLK_CTL_CLK_POW_DOWN;
-		WREG_DAC(MGA1064_PIX_CLK_CTL, tmp);
+		WREG8(DAC_DATA, tmp);
 
 		udelay(500);
 
···
 		tmp = RREG8(DAC_DATA);
 		tmp &= ~MGA1064_PIX_CLK_CTL_SEL_MSK;
 		tmp |= MGA1064_PIX_CLK_CTL_SEL_PLL;
-		WREG_DAC(MGA1064_PIX_CLK_CTL, tmp);
+		WREG8(DAC_DATA, tmp);
 
 		WREG8(DAC_INDEX, MGA1064_PIX_CLK_CTL);
 		tmp = RREG8(DAC_DATA);
 		tmp &= ~MGA1064_PIX_CLK_CTL_CLK_DIS;
 		tmp &= ~MGA1064_PIX_CLK_CTL_CLK_POW_DOWN;
-		WREG_DAC(MGA1064_PIX_CLK_CTL, tmp);
+		WREG8(DAC_DATA, tmp);
 
 		vcount = RREG8(MGAREG_VCOUNT);
 
···
 	WREG8(DAC_INDEX, MGA1064_PIX_CLK_CTL);
 	tmp = RREG8(DAC_DATA);
 	tmp |= MGA1064_PIX_CLK_CTL_CLK_DIS;
-	WREG_DAC(MGA1064_PIX_CLK_CTL_CLK_DIS, tmp);
+	WREG8(DAC_DATA, tmp);
 
 	WREG8(DAC_INDEX, MGA1064_REMHEADCTL);
 	tmp = RREG8(DAC_DATA);
 	tmp |= MGA1064_REMHEADCTL_CLKDIS;
-	WREG_DAC(MGA1064_REMHEADCTL, tmp);
+	WREG8(DAC_DATA, tmp);
 
 	tmp = RREG8(MGAREG_MEM_MISC_READ);
 	tmp |= (0x3<<2) | 0xc0;
···
 	tmp = RREG8(DAC_DATA);
 	tmp &= ~MGA1064_PIX_CLK_CTL_CLK_DIS;
 	tmp |= MGA1064_PIX_CLK_CTL_CLK_POW_DOWN;
-	WREG_DAC(MGA1064_PIX_CLK_CTL, tmp);
+	WREG8(DAC_DATA, tmp);
 
 	udelay(500);
 
···
 	WREG_DAC(MGA1064_GEN_IO_DATA, tmp);
 }
 
-
+/*
+   This is how the framebuffer base address is stored in g200 cards:
+   * Assume @offset is the gpu_addr variable of the framebuffer object
+   * Then addr is the number of _pixels_ (not bytes) from the start of
+     VRAM to the first pixel we want to display. (divided by 2 for 32bit
+     framebuffers)
+   * addr is stored in the CRTCEXT0, CRTCC and CRTCD registers
+   addr<20> -> CRTCEXT0<6>
+   addr<19-16> -> CRTCEXT0<3-0>
+   addr<15-8> -> CRTCC<7-0>
+   addr<7-0> -> CRTCD<7-0>
+   CRTCEXT0 has to be programmed last to trigger an update and make the
+   new addr variable take effect.
+ */
 void mga_set_start_address(struct drm_crtc *crtc, unsigned offset)
 {
 	struct mga_device *mdev = crtc->dev->dev_private;
 	u32 addr;
 	int count;
+	u8 crtcext0;
 
 	while (RREG8(0x1fda) & 0x08);
 	while (!(RREG8(0x1fda) & 0x08));
···
 	count = RREG8(MGAREG_VCOUNT) + 2;
 	while (RREG8(MGAREG_VCOUNT) < count);
 
-	addr = offset >> 2;
+	WREG8(MGAREG_CRTCEXT_INDEX, 0);
+	crtcext0 = RREG8(MGAREG_CRTCEXT_DATA);
+	crtcext0 &= 0xB0;
+	addr = offset / 8;
+	/* Can't store addresses any higher than that...
+	   but we also don't have more than 16MB of memory, so it should be fine. */
+	WARN_ON(addr > 0x1fffff);
+	crtcext0 |= (!!(addr & (1<<20)))<<6;
 	WREG_CRT(0x0d, (u8)(addr & 0xff));
 	WREG_CRT(0x0c, (u8)(addr >> 8) & 0xff);
-	WREG_CRT(0xaf, (u8)(addr >> 16) & 0xf);
+	WREG_ECRT(0x0, ((u8)(addr >> 16) & 0xf) | crtcext0);
 }
 
 
···
 
 
 	for (i = 0; i < sizeof(dacvalue); i++) {
-		if ((i <= 0x03) ||
-		    (i == 0x07) ||
-		    (i == 0x0b) ||
-		    (i == 0x0f) ||
-		    ((i >= 0x13) && (i <= 0x17)) ||
+		if ((i <= 0x17) ||
 		    (i == 0x1b) ||
 		    (i == 0x1c) ||
 		    ((i >= 0x1f) && (i <= 0x29)) ||

drivers/gpu/drm/qxl/qxl_cmd.c

···
 	return 0;
 }
 
-static int wait_for_io_cmd_user(struct qxl_device *qdev, uint8_t val, long port)
+static int wait_for_io_cmd_user(struct qxl_device *qdev, uint8_t val, long port, bool intr)
 {
 	int irq_num;
 	long addr = qdev->io_base + port;
···
 
 	mutex_lock(&qdev->async_io_mutex);
 	irq_num = atomic_read(&qdev->irq_received_io_cmd);
-
-
 	if (qdev->last_sent_io_cmd > irq_num) {
-		ret = wait_event_interruptible(qdev->io_cmd_event,
-					       atomic_read(&qdev->irq_received_io_cmd) > irq_num);
-		if (ret)
+		if (intr)
+			ret = wait_event_interruptible_timeout(qdev->io_cmd_event,
+							       atomic_read(&qdev->irq_received_io_cmd) > irq_num, 5*HZ);
+		else
+			ret = wait_event_timeout(qdev->io_cmd_event,
+						 atomic_read(&qdev->irq_received_io_cmd) > irq_num, 5*HZ);
+		/* 0 is timeout, just bail the "hw" has gone away */
+		if (ret <= 0)
 			goto out;
 		irq_num = atomic_read(&qdev->irq_received_io_cmd);
 	}
 	outb(val, addr);
 	qdev->last_sent_io_cmd = irq_num + 1;
-	ret = wait_event_interruptible(qdev->io_cmd_event,
-				       atomic_read(&qdev->irq_received_io_cmd) > irq_num);
+	if (intr)
+		ret = wait_event_interruptible_timeout(qdev->io_cmd_event,
+						       atomic_read(&qdev->irq_received_io_cmd) > irq_num, 5*HZ);
+	else
+		ret = wait_event_timeout(qdev->io_cmd_event,
+					 atomic_read(&qdev->irq_received_io_cmd) > irq_num, 5*HZ);
 out:
+	if (ret > 0)
+		ret = 0;
 	mutex_unlock(&qdev->async_io_mutex);
 	return ret;
 }
···
 	int ret;
 
 restart:
-	ret = wait_for_io_cmd_user(qdev, val, port);
+	ret = wait_for_io_cmd_user(qdev, val, port, false);
 	if (ret == -ERESTARTSYS)
 		goto restart;
 }
···
 	mutex_lock(&qdev->update_area_mutex);
 	qdev->ram_header->update_area = *area;
 	qdev->ram_header->update_surface = surface_id;
-	ret = wait_for_io_cmd_user(qdev, 0, QXL_IO_UPDATE_AREA_ASYNC);
+	ret = wait_for_io_cmd_user(qdev, 0, QXL_IO_UPDATE_AREA_ASYNC, true);
 	mutex_unlock(&qdev->update_area_mutex);
 	return ret;
 }

drivers/gpu/drm/qxl/qxl_display.c

···
 	int inc = 1;
 
 	qobj = gem_to_qxl_bo(qxl_fb->obj);
-	if (qxl_fb != qdev->active_user_framebuffer) {
-		DRM_INFO("%s: qxl_fb 0x%p != qdev->active_user_framebuffer 0x%p\n",
-			__func__, qxl_fb, qdev->active_user_framebuffer);
-	}
+	/* if we aren't primary surface ignore this */
+	if (!qobj->is_primary)
+		return 0;
+
 	if (!num_clips) {
 		num_clips = 1;
 		clips = &norect;
···
 					       mode->hdisplay,
 					       mode->vdisplay);
 	}
-	qdev->mode_set = true;
 	return 0;
 }
 
···
 {
 	struct drm_gem_object *obj;
 	struct qxl_framebuffer *qxl_fb;
-	struct qxl_device *qdev = dev->dev_private;
 	int ret;
 
 	obj = drm_gem_object_lookup(dev, file_priv, mode_cmd->handles[0]);
···
 		drm_gem_object_unreference_unlocked(obj);
 		return NULL;
 	}
-
-	if (qdev->active_user_framebuffer) {
-		DRM_INFO("%s: active_user_framebuffer %p -> %p\n",
-			 __func__,
-			 qdev->active_user_framebuffer, qxl_fb);
-	}
-	qdev->active_user_framebuffer = qxl_fb;
 
 	return &qxl_fb->base;
 }

drivers/gpu/drm/qxl/qxl_drv.h

···
 	struct qxl_gem		gem;
 	struct qxl_mode_info mode_info;
 
-	/*
-	 * last created framebuffer with fb_create
-	 * only used by debugfs dumbppm
-	 */
-	struct qxl_framebuffer *active_user_framebuffer;
-
 	struct fb_info			*fbdev_info;
 	struct qxl_framebuffer	*fbdev_qfb;
 	void *ram_physical;
···
 	struct qxl_ring *cursor_ring;
 
 	struct qxl_ram_header *ram_header;
-	bool mode_set;
 
 	bool primary_created;
 

drivers/gpu/drm/qxl/qxl_ioctl.c

···
 		goto out;
 
 	if (!qobj->pin_count) {
+		qxl_ttm_placement_from_domain(qobj, qobj->type);
 		ret = ttm_bo_validate(&qobj->tbo, &qobj->placement,
 				      true, false);
 		if (unlikely(ret))

drivers/gpu/drm/radeon/r300_cmdbuf.c

···
 		OUT_RING(CP_PACKET0(R300_RE_CLIPRECT_TL_0, nr * 2 - 1));
 
 		for (i = 0; i < nr; ++i) {
-			if (DRM_COPY_FROM_USER_UNCHECKED
+			if (DRM_COPY_FROM_USER
 			    (&box, &cmdbuf->boxes[n + i], sizeof(box))) {
 				DRM_ERROR("copy cliprect faulted\n");
 				return -EFAULT;

drivers/gpu/drm/radeon/radeon_drv.c

···
 #endif
 
 int radeon_no_wb;
-int radeon_modeset = 1;
+int radeon_modeset = -1;
 int radeon_dynclks = -1;
 int radeon_r4xx_atom = 0;
 int radeon_agpmode = 0;
···
 
 static int __init radeon_init(void)
 {
+#ifdef CONFIG_VGA_CONSOLE
+	if (vgacon_text_force() && radeon_modeset == -1) {
+		DRM_INFO("VGACON disable radeon kernel modesetting.\n");
+		radeon_modeset = 0;
+	}
+#endif
+	/* set to modesetting by default if not nomodeset */
+	if (radeon_modeset == -1)
+		radeon_modeset = 1;
+
 	if (radeon_modeset == 1) {
 		DRM_INFO("radeon kernel modesetting enabled.\n");
 		driver = &kms_driver;

drivers/gpu/host1x/drm/dc.c

···
 		return err;
 
 	regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (!regs) {
-		dev_err(&pdev->dev, "failed to get registers\n");
-		return -ENXIO;
-	}
-
 	dc->regs = devm_ioremap_resource(&pdev->dev, regs);
 	if (IS_ERR(dc->regs))
 		return PTR_ERR(dc->regs);

drivers/hwmon/abituguru.c

···
 	pr_info("found Abit uGuru\n");
 
 	/* Register sysfs hooks */
-	for (i = 0; i < sysfs_attr_i; i++)
-		if (device_create_file(&pdev->dev,
-				&data->sysfs_attr[i].dev_attr))
+	for (i = 0; i < sysfs_attr_i; i++) {
+		res = device_create_file(&pdev->dev,
+					 &data->sysfs_attr[i].dev_attr);
+		if (res)
 			goto abituguru_probe_error;
-	for (i = 0; i < ARRAY_SIZE(abituguru_sysfs_attr); i++)
-		if (device_create_file(&pdev->dev,
-				&abituguru_sysfs_attr[i].dev_attr))
+	}
+	for (i = 0; i < ARRAY_SIZE(abituguru_sysfs_attr); i++) {
+		res = device_create_file(&pdev->dev,
+					 &abituguru_sysfs_attr[i].dev_attr);
+		if (res)
 			goto abituguru_probe_error;
+	}
 
 	data->hwmon_dev = hwmon_device_register(&pdev->dev);
 	if (!IS_ERR(data->hwmon_dev))

drivers/hwmon/iio_hwmon.c

···
 		return PTR_ERR(channels);
 
 	st = devm_kzalloc(dev, sizeof(*st), GFP_KERNEL);
-	if (st == NULL)
-		return -ENOMEM;
+	if (st == NULL) {
+		ret = -ENOMEM;
+		goto error_release_channels;
+	}
 
 	st->channels = channels;
 
···
 error_remove_group:
 	sysfs_remove_group(&dev->kobj, &st->attr_group);
 error_release_channels:
-	iio_channel_release_all(st->channels);
+	iio_channel_release_all(channels);
 	return ret;
 }
 

drivers/hwmon/nct6775.c

···
 			data->have_temp |= 1 << i;
 			data->have_temp_fixed |= 1 << i;
 			data->reg_temp[0][i] = reg_temp_alternate[i];
-			data->reg_temp[1][i] = reg_temp_over[i];
-			data->reg_temp[2][i] = reg_temp_hyst[i];
+			if (i < num_reg_temp) {
+				data->reg_temp[1][i] = reg_temp_over[i];
+				data->reg_temp[2][i] = reg_temp_hyst[i];
+			}
 			data->temp_src[i] = i + 1;
 			continue;
 		}

drivers/hwmon/tmp401.c

···
 	mutex_lock(&data->update_lock);
 
 	next_update = data->last_updated +
-		      msecs_to_jiffies(data->update_interval) + 1;
+		      msecs_to_jiffies(data->update_interval);
 	if (time_after(jiffies, next_update) || !data->valid) {
 		if (data->kind != tmp432) {
 			/*

drivers/i2c/busses/i2c-s3c2410.c

···
 	/* map the registers */
 
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (res == NULL) {
-		dev_err(&pdev->dev, "cannot find IO resource\n");
-		return -ENOENT;
-	}
-
 	i2c->regs = devm_ioremap_resource(&pdev->dev, res);
 
 	if (IS_ERR(i2c->regs))

drivers/i2c/busses/i2c-sirf.c

···
 	adap->class = I2C_CLASS_HWMON;
 
 	mem_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (mem_res == NULL) {
-		dev_err(&pdev->dev, "Unable to get MEM resource\n");
-		err = -EINVAL;
-		goto out;
-	}
-
 	siic->base = devm_ioremap_resource(&pdev->dev, mem_res);
 	if (IS_ERR(siic->base)) {
 		err = PTR_ERR(siic->base);

drivers/i2c/busses/i2c-tegra.c

···
 	int ret = 0;
 
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (!res) {
-		dev_err(&pdev->dev, "no mem resource\n");
-		return -EINVAL;
-	}
-
 	base = devm_ioremap_resource(&pdev->dev, res);
 	if (IS_ERR(base))
 		return PTR_ERR(base);

drivers/lguest/page_tables.c

···
 			kill_guest(&lg->cpus[0],
 				   "Cannot populate switcher mapping");
 		}
+		lg->pgdirs[pgdir].last_host_cpu = -1;
 	}
 }
 

drivers/md/dm-thin.c

···
 
 	*need_commit = false;
 
-	metadata_dev_size = get_metadata_dev_size(pool->md_dev);
+	metadata_dev_size = get_metadata_dev_size_in_blocks(pool->md_dev);
 
 	r = dm_pool_get_metadata_dev_size(pool->pmd, &sb_metadata_dev_size);
 	if (r) {
···
 	}
 
 	if (metadata_dev_size < sb_metadata_dev_size) {
-		DMERR("metadata device (%llu sectors) too small: expected %llu",
+		DMERR("metadata device (%llu blocks) too small: expected %llu",
 		      metadata_dev_size, sb_metadata_dev_size);
 		return -EINVAL;
 

drivers/memory/emif.c

···
 	platform_set_drvdata(pdev, emif);
 
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (!res) {
-		dev_err(emif->dev, "%s: error getting memory resource\n",
-			__func__);
-		goto error;
-	}
-
 	emif->base = devm_ioremap_resource(emif->dev, res);
 	if (IS_ERR(emif->base))
 		goto error;

drivers/mfd/intel_msic.c

···
 	 * the clients via intel_msic_irq_read().
 	 */
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (!res) {
-		dev_err(&pdev->dev, "failed to get SRAM iomem resource\n");
-		return -ENODEV;
-	}
-
 	msic->irq_base = devm_ioremap_resource(&pdev->dev, res);
 	if (IS_ERR(msic->irq_base))
 		return PTR_ERR(msic->irq_base);

drivers/misc/atmel-ssc.c

···
 	ssc->pdata = (struct atmel_ssc_platform_data *)plat_dat;
 
 	regs = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (!regs) {
-		dev_dbg(&pdev->dev, "no mmio resource defined\n");
-		return -ENXIO;
-	}
-
 	ssc->regs = devm_ioremap_resource(&pdev->dev, regs);
 	if (IS_ERR(ssc->regs))
 		return PTR_ERR(ssc->regs);

drivers/mmc/host/mmci.c

···
 	struct variant_data *variant = host->variant;
 	u32 pwr = 0;
 	unsigned long flags;
+	int ret;
 
 	pm_runtime_get_sync(mmc_dev(mmc));
 
···
 		break;
 	case MMC_POWER_ON:
 		if (!IS_ERR(mmc->supply.vqmmc) &&
-		    !regulator_is_enabled(mmc->supply.vqmmc))
-			regulator_enable(mmc->supply.vqmmc);
+		    !regulator_is_enabled(mmc->supply.vqmmc)) {
+			ret = regulator_enable(mmc->supply.vqmmc);
+			if (ret < 0)
+				dev_err(mmc_dev(mmc),
+					"failed to enable vqmmc regulator\n");
+		}
 
 		pwr |= MCI_PWR_ON;
 		break;

drivers/mtd/nand/lpc32xx_mlc.c

···
 	}
 
 	rc = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (rc == NULL) {
-		dev_err(&pdev->dev, "No memory resource found for device!\r\n");
-		return -ENXIO;
-	}
-
 	host->io_base = devm_ioremap_resource(&pdev->dev, rc);
 	if (IS_ERR(host->io_base))
 		return PTR_ERR(host->io_base);

drivers/net/caif/Kconfig

···
 
 config CAIF_VIRTIO
 	tristate "CAIF virtio transport driver"
-	depends on CAIF
+	depends on CAIF && HAS_DMA
 	select VHOST_RING
 	select VIRTIO
 	select GENERIC_ALLOCATOR

drivers/net/ethernet/3com/3c59x.c

···
 		pm_state_valid:1,				/* pci_dev->saved_config_space has sane contents */
 		open:1,
 		medialock:1,
-		must_free_region:1,				/* Flag: if zero, Cardbus owns the I/O region */
 		large_frames:1,			/* accept large frames */
 		handling_irq:1;			/* private in_irq indicator */
 	/* {get|set}_wol operations are already serialized by rtnl.
···
 	if (rc < 0)
 		goto out;
 
+	rc = pci_request_regions(pdev, DRV_NAME);
+	if (rc < 0) {
+		pci_disable_device(pdev);
+		goto out;
+	}
+
 	unit = vortex_cards_found;
 
 	if (global_use_mmio < 0 && (unit >= MAX_UNITS || use_mmio[unit] < 0)) {
···
 	if (!ioaddr) /* If mapping fails, fall-back to BAR 0... */
 		ioaddr = pci_iomap(pdev, 0, 0);
 	if (!ioaddr) {
+		pci_release_regions(pdev);
 		pci_disable_device(pdev);
 		rc = -ENOMEM;
 		goto out;
···
 			   ent->driver_data, unit);
 	if (rc < 0) {
 		pci_iounmap(pdev, ioaddr);
+		pci_release_regions(pdev);
 		pci_disable_device(pdev);
 		goto out;
 	}
···
 
 	/* PCI-only startup logic */
 	if (pdev) {
-		/* EISA resources already marked, so only PCI needs to do this here */
-		/* Ignore return value, because Cardbus drivers already allocate for us */
-		if (request_region(dev->base_addr, vci->io_size, print_name) != NULL)
-			vp->must_free_region = 1;
-
 		/* enable bus-mastering if necessary */
 		if (vci->flags & PCI_USES_MASTER)
 			pci_set_master(pdev);
···
 					   &vp->rx_ring_dma);
 	retval = -ENOMEM;
 	if (!vp->rx_ring)
-		goto free_region;
+		goto free_device;
 
 	vp->tx_ring = (struct boom_tx_desc *)(vp->rx_ring + RX_RING_SIZE);
 	vp->tx_ring_dma = vp->rx_ring_dma + sizeof(struct boom_rx_desc) * RX_RING_SIZE;
···
 							+ sizeof(struct boom_tx_desc) * TX_RING_SIZE,
 						vp->rx_ring,
 						vp->rx_ring_dma);
-free_region:
-	if (vp->must_free_region)
-		release_region(dev->base_addr, vci->io_size);
+free_device:
 	free_netdev(dev);
 	pr_err(PFX "vortex_probe1 fails.  Returns %d\n", retval);
 out:
···
 							+ sizeof(struct boom_tx_desc) * TX_RING_SIZE,
 						vp->rx_ring,
 						vp->rx_ring_dma);
-	if (vp->must_free_region)
-		release_region(dev->base_addr, vp->io_size);
+
+	pci_release_regions(pdev);
+
 	free_netdev(dev);
 }
 

drivers/net/ethernet/brocade/bna/bnad.c

···
 
 	sprintf(bnad->wq_name, "%s_wq_%d", BNAD_NAME, bnad->id);
 	bnad->work_q = create_singlethread_workqueue(bnad->wq_name);
-
-	if (!bnad->work_q)
+	if (!bnad->work_q) {
+		iounmap(bnad->bar0);
 		return -ENOMEM;
+	}
 
 	return 0;
 }

drivers/net/ethernet/cadence/Kconfig

···
 
 config ARM_AT91_ETHER
 	tristate "AT91RM9200 Ethernet support"
-	depends on GENERIC_HARDIRQS
+	depends on GENERIC_HARDIRQS && HAS_DMA
 	select NET_CORE
 	select MACB
 	---help---
···
 
 config MACB
 	tristate "Cadence MACB/GEM support"
+	depends on HAS_DMA
 	select PHYLIB
 	---help---
 	  The Cadence MACB ethernet interface is found on many Atmel AT32 and

drivers/net/ethernet/calxeda/Kconfig

···
 config NET_CALXEDA_XGMAC
 	tristate "Calxeda 1G/10G XGMAC Ethernet driver"
-	depends on HAS_IOMEM
+	depends on HAS_IOMEM && HAS_DMA
 	select CRC32
 	help
 	  This is the driver for the XGMAC Ethernet IP block found on Calxeda

drivers/net/ethernet/freescale/fec_main.c

···
 #define FEC_QUIRK_HAS_GBIT		(1 << 3)
 /* Controller has extend desc buffer */
 #define FEC_QUIRK_HAS_BUFDESC_EX	(1 << 4)
+/* Controller has hardware checksum support */
+#define FEC_QUIRK_HAS_CSUM		(1 << 5)
 
 static struct platform_device_id fec_devtype[] = {
 	{
···
 	}, {
 		.name = "imx6q-fec",
 		.driver_data = FEC_QUIRK_ENET_MAC | FEC_QUIRK_HAS_GBIT |
-				FEC_QUIRK_HAS_BUFDESC_EX,
+				FEC_QUIRK_HAS_BUFDESC_EX | FEC_QUIRK_HAS_CSUM,
 	}, {
 		.name = "mvf-fec",
 		.driver_data = FEC_QUIRK_ENET_MAC,
···
 static int fec_enet_init(struct net_device *ndev)
 {
 	struct fec_enet_private *fep = netdev_priv(ndev);
+	const struct platform_device_id *id_entry =
+				platform_get_device_id(fep->pdev);
 	struct bufdesc *cbd_base;
 
 	/* Allocate memory for buffer descriptors. */
···
 	writel(FEC_RX_DISABLED_IMASK, fep->hwp + FEC_IMASK);
 	netif_napi_add(ndev, &fep->napi, fec_enet_rx_napi, FEC_NAPI_WEIGHT);
 
-	/* enable hw accelerator */
-	ndev->features |= (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM
-			| NETIF_F_RXCSUM);
-	ndev->hw_features |= (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM
-			| NETIF_F_RXCSUM);
-	fep->csum_flags |= FLAG_RX_CSUM_ENABLED;
+	if (id_entry->driver_data & FEC_QUIRK_HAS_CSUM) {
+		/* enable hw accelerator */
+		ndev->features |= (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM
+				| NETIF_F_RXCSUM);
+		ndev->hw_features |= (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM
+				| NETIF_F_RXCSUM);
+		fep->csum_flags |= FLAG_RX_CSUM_ENABLED;
+	}
 
 	fec_restart(ndev, 0);
 

drivers/net/ethernet/ibm/emac/core.c

···
 	}
 
 #ifdef CONFIG_PPC_DCR_NATIVE
-	/* Enable internal clock source */
-	if (emac_has_feature(dev, EMAC_FTR_460EX_PHY_CLK_FIX))
-		dcri_clrset(SDR0, SDR0_ETH_CFG,
-			    0, SDR0_ETH_CFG_ECS << dev->cell_index);
+	/*
+	 * PPC460EX/GT Embedded Processor Advanced User's Manual
+	 * section 28.10.1 Mode Register 0 (EMACx_MR0) states:
+	 * Note: The PHY must provide a TX Clk in order to perform a soft reset
+	 * of the EMAC. If none is present, select the internal clock
+	 * (SDR0_ETH_CFG[EMACx_PHY_CLK] = 1).
+	 * After a soft reset, select the external clock.
+	 */
+	if (emac_has_feature(dev, EMAC_FTR_460EX_PHY_CLK_FIX)) {
+		if (dev->phy_address == 0xffffffff &&
+		    dev->phy_map == 0xffffffff) {
+			/* No PHY: select internal loop clock before reset */
+			dcri_clrset(SDR0, SDR0_ETH_CFG,
+				    0, SDR0_ETH_CFG_ECS << dev->cell_index);
+		} else {
+			/* PHY present: select external clock before reset */
+			dcri_clrset(SDR0, SDR0_ETH_CFG,
+				    SDR0_ETH_CFG_ECS << dev->cell_index, 0);
+		}
+	}
 #endif
 
 	out_be32(&p->mr0, EMAC_MR0_SRST);
···
 		--n;
 
 #ifdef CONFIG_PPC_DCR_NATIVE
-	 /* Enable external clock source */
-	if (emac_has_feature(dev, EMAC_FTR_460EX_PHY_CLK_FIX))
-		dcri_clrset(SDR0, SDR0_ETH_CFG,
-			    SDR0_ETH_CFG_ECS << dev->cell_index, 0);
+	if (emac_has_feature(dev, EMAC_FTR_460EX_PHY_CLK_FIX)) {
+		if (dev->phy_address == 0xffffffff &&
+		    dev->phy_map == 0xffffffff) {
+			/* No PHY: restore external clock source after reset */
+			dcri_clrset(SDR0, SDR0_ETH_CFG,
+				    SDR0_ETH_CFG_ECS << dev->cell_index, 0);
+		}
+	}
 #endif
 
 	if (n) {

drivers/net/ethernet/mellanox/mlx4/en_resources.c

···
 	context->pri_path.sched_queue = 0x83 | (priv->port - 1) << 6;
 	if (user_prio >= 0) {
 		context->pri_path.sched_queue |= user_prio << 3;
-		context->pri_path.feup = 1 << 6;
+		context->pri_path.feup = MLX4_FEUP_FORCE_ETH_UP;
 	}
 	context->pri_path.counter_index = 0xff;
 	context->cqn_send = cpu_to_be32(cqn);

drivers/net/ethernet/mellanox/mlx4/fw.c

···
 		[2] = "RSS XOR Hash Function support",
 		[3] = "Device manage flow steering support",
 		[4] = "Automatic MAC reassignment support",
-		[5] = "Time stamping support"
+		[5] = "Time stamping support",
+		[6] = "VST (control vlan insertion/stripping) support",
+		[7] = "FSM (MAC anti-spoofing) support"
 	};
 	int i;
 

drivers/net/ethernet/mellanox/mlx4/resource_tracker.c

···
 		if (MLX4_QP_ST_RC == qp_type)
 			return -EINVAL;
 
+		/* force strip vlan by clear vsd */
+		qpc->param3 &= ~cpu_to_be32(MLX4_STRIP_VLAN);
+		if (0 != vp_oper->state.default_vlan) {
+			qpc->pri_path.vlan_control =
+				MLX4_VLAN_CTRL_ETH_TX_BLOCK_TAGGED |
+				MLX4_VLAN_CTRL_ETH_RX_BLOCK_PRIO_TAGGED |
+				MLX4_VLAN_CTRL_ETH_RX_BLOCK_UNTAGGED;
+		} else { /* priority tagged */
+			qpc->pri_path.vlan_control =
+				MLX4_VLAN_CTRL_ETH_TX_BLOCK_TAGGED |
+				MLX4_VLAN_CTRL_ETH_RX_BLOCK_TAGGED;
+		}
+
+		qpc->pri_path.fvl_rx |= MLX4_FVL_RX_FORCE_ETH_VLAN;
 		qpc->pri_path.vlan_index = vp_oper->vlan_idx;
-		qpc->pri_path.fl = (1 << 6) | (1 << 2); /* set cv bit and hide_cqe_vlan bit*/
-		qpc->pri_path.feup |= 1 << 3; /* set fvl bit */
+		qpc->pri_path.fl |= MLX4_FL_CV | MLX4_FL_ETH_HIDE_CQE_VLAN;
+		qpc->pri_path.feup |= MLX4_FEUP_FORCE_ETH_UP | MLX4_FVL_FORCE_ETH_VLAN;
 		qpc->pri_path.sched_queue &= 0xC7;
 		qpc->pri_path.sched_queue |= (vp_oper->state.default_qos) << 3;
-		mlx4_dbg(dev, "qp %d  port %d Q 0x%x set vlan to %d vidx %d feup %x fl %x\n",
-			 be32_to_cpu(qpc->local_qpn) & 0xffffff, port,
-			 (int)(qpc->pri_path.sched_queue), vp_oper->state.default_vlan,
-			 vp_oper->vlan_idx, (int)(qpc->pri_path.feup),
-			 (int)(qpc->pri_path.fl));
 	}
 	if (vp_oper->state.spoofchk) {
-		qpc->pri_path.feup |= 1 << 5; /* set fsm bit */;
+		qpc->pri_path.feup |= MLX4_FSM_FORCE_ETH_SRC_MAC;
 		qpc->pri_path.grh_mylmc = (0x80 & qpc->pri_path.grh_mylmc) + vp_oper->mac_idx;
-		mlx4_dbg(dev, "spoof qp %d  port %d feup  0x%x, myLmc 0x%x mindx %d\n",
-			 be32_to_cpu(qpc->local_qpn) & 0xffffff, port,
-			 (int)qpc->pri_path.feup, (int)qpc->pri_path.grh_mylmc,
-			 vp_oper->mac_idx);
 	}
 	return 0;
 }

drivers/net/ethernet/qlogic/qlcnic/qlcnic.h

···
 
 	u16 port_type;
 	u16 board_type;
+	u16 supported_type;
 
 	u16 link_speed;
 	u16 link_duplex;
···
 void qlcnic_remove_diag_entries(struct qlcnic_adapter *adapter);
 void qlcnic_82xx_add_sysfs(struct qlcnic_adapter *adapter);
 void qlcnic_82xx_remove_sysfs(struct qlcnic_adapter *adapter);
+int qlcnic_82xx_get_settings(struct qlcnic_adapter *, struct ethtool_cmd *);
 
 int qlcnicvf_config_bridged_mode(struct qlcnic_adapter *, u32);
 int qlcnicvf_config_led(struct qlcnic_adapter *, u32, u32);

drivers/net/ethernet/qlogic/qlcnic/qlcnic_83xx_hw.c

···
 	return 1;
 }
 
-u32 qlcnic_83xx_mbx_poll(struct qlcnic_adapter *adapter)
+u32 qlcnic_83xx_mbx_poll(struct qlcnic_adapter *adapter, u32 *wait_time)
 {
 	u32 data;
-	unsigned long wait_time = 0;
 	struct qlcnic_hardware_context *ahw = adapter->ahw;
 	/* wait for mailbox completion */
 	do {
 		data = QLCRDX(ahw, QLCNIC_FW_MBX_CTRL);
-		if (++wait_time > QLCNIC_MBX_TIMEOUT) {
+		if (++(*wait_time) > QLCNIC_MBX_TIMEOUT) {
 			data = QLCNIC_RCODE_TIMEOUT;
 			break;
 		}
···
 	u16 opcode;
 	u8 mbx_err_code;
 	unsigned long flags;
-	u32 rsp, mbx_val, fw_data, rsp_num, mbx_cmd;
 	struct qlcnic_hardware_context *ahw = adapter->ahw;
+	u32 rsp, mbx_val, fw_data, rsp_num, mbx_cmd, wait_time = 0;
 
 	opcode = LSW(cmd->req.arg[0]);
 	if (!test_bit(QLC_83XX_MBX_READY, &adapter->ahw->idc.status)) {
···
 	/* Signal FW about the impending command */
 	QLCWRX(ahw, QLCNIC_HOST_MBX_CTRL, QLCNIC_SET_OWNER);
 poll:
-	rsp = qlcnic_83xx_mbx_poll(adapter);
+	rsp = qlcnic_83xx_mbx_poll(adapter, &wait_time);
 	if (rsp != QLCNIC_RCODE_TIMEOUT) {
 		/* Get the FW response data */
 		fw_data = readl(QLCNIC_MBX_FW(ahw, 0));
 		if (fw_data &  QLCNIC_MBX_ASYNC_EVENT) {
 			__qlcnic_83xx_process_aen(adapter);
-			mbx_val = QLCRDX(ahw, QLCNIC_HOST_MBX_CTRL);
-			if (mbx_val)
-				goto poll;
+			goto poll;
 		}
 		mbx_err_code = QLCNIC_MBX_STATUS(fw_data);
 		rsp_num = QLCNIC_MBX_NUM_REGS(fw_data);
···
 	return err;
 }
 
-static int qlcnic_83xx_diag_alloc_res(struct net_device *netdev, int test)
+static int qlcnic_83xx_diag_alloc_res(struct net_device *netdev, int test,
+				      int num_sds_ring)
 {
 	struct qlcnic_adapter *adapter = netdev_priv(netdev);
 	struct qlcnic_host_sds_ring *sds_ring;
 	struct qlcnic_host_rds_ring *rds_ring;
+	u16 adapter_state = adapter->is_up;
 	u8 ring;
 	int ret;
 
···
 	ret = qlcnic_fw_create_ctx(adapter);
 	if (ret) {
 		qlcnic_detach(adapter);
+		if (adapter_state == QLCNIC_ADAPTER_UP_MAGIC) {
+			adapter->max_sds_rings = num_sds_ring;
+			qlcnic_attach(adapter);
+		}
 		netif_device_attach(netdev);
 		return ret;
 	}
···
 	if (test_and_set_bit(__QLCNIC_RESETTING, &adapter->state))
 		return -EBUSY;
 
-	ret = qlcnic_83xx_diag_alloc_res(netdev, QLCNIC_LOOPBACK_TEST);
+	ret = qlcnic_83xx_diag_alloc_res(netdev, QLCNIC_LOOPBACK_TEST,
+					 max_sds_rings);
 	if (ret)
 		goto fail_diag_alloc;
 
···
 			break;
 		}
 		config = cmd.rsp.arg[3];
+		if (QLC_83XX_SFP_PRESENT(config)) {
+			switch (ahw->module_type) {
+			case LINKEVENT_MODULE_OPTICAL_UNKNOWN:
+			case LINKEVENT_MODULE_OPTICAL_SRLR:
+			case LINKEVENT_MODULE_OPTICAL_LRM:
+			case LINKEVENT_MODULE_OPTICAL_SFP_1G:
+				ahw->supported_type = PORT_FIBRE;
+				break;
+			case LINKEVENT_MODULE_TWINAX_UNSUPPORTED_CABLE:
+			case LINKEVENT_MODULE_TWINAX_UNSUPPORTED_CABLELEN:
+			case LINKEVENT_MODULE_TWINAX:
+				ahw->supported_type = PORT_TP;
+				break;
+			default:
+				ahw->supported_type = PORT_OTHER;
+			}
+		}
 		if (config & 1)
 			err = 1;
 	}
···
 	return config;
 }
 
-int qlcnic_83xx_get_settings(struct qlcnic_adapter *adapter)
+int qlcnic_83xx_get_settings(struct qlcnic_adapter *adapter,
+			     struct ethtool_cmd *ecmd)
 {
 	u32 config = 0;
 	int status = 0;
···
 	ahw->module_type = QLC_83XX_SFP_MODULE_TYPE(config);
 	/* hard code until there is a way to get it from flash */
 	ahw->board_type = QLCNIC_BRDTYPE_83XX_10G;
+
+	if (netif_running(adapter->netdev) && ahw->has_link_events) {
+		ethtool_cmd_speed_set(ecmd, ahw->link_speed);
+		ecmd->duplex = ahw->link_duplex;
+		ecmd->autoneg = ahw->link_autoneg;
+	} else {
+		ethtool_cmd_speed_set(ecmd, SPEED_UNKNOWN);
+		ecmd->duplex = DUPLEX_UNKNOWN;
+		ecmd->autoneg = AUTONEG_DISABLE;
+	}
+
+	if (ahw->port_type == QLCNIC_XGBE) {
+		ecmd->supported = SUPPORTED_1000baseT_Full;
+		ecmd->advertising = ADVERTISED_1000baseT_Full;
+	} else {
+		ecmd->supported = (SUPPORTED_10baseT_Half |
+				   SUPPORTED_10baseT_Full |
+				   SUPPORTED_100baseT_Half |
+				   SUPPORTED_100baseT_Full |
+				   SUPPORTED_1000baseT_Half |
+				   SUPPORTED_1000baseT_Full);
+		ecmd->advertising = (ADVERTISED_100baseT_Half |
+				     ADVERTISED_100baseT_Full |
+				     ADVERTISED_1000baseT_Half |
+				     ADVERTISED_1000baseT_Full);
+	}
+
+	switch (ahw->supported_type) {
+	case PORT_FIBRE:
+		ecmd->supported |= SUPPORTED_FIBRE;
+		ecmd->advertising |= ADVERTISED_FIBRE;
+		ecmd->port = PORT_FIBRE;
+		ecmd->transceiver = XCVR_EXTERNAL;
+		break;
+	case PORT_TP:
+		ecmd->supported |= SUPPORTED_TP;
+		ecmd->advertising |= ADVERTISED_TP;
+		ecmd->port = PORT_TP;
+		ecmd->transceiver = XCVR_INTERNAL;
+		break;
+	default:
+		ecmd->supported |= SUPPORTED_FIBRE;
+		ecmd->advertising |= ADVERTISED_FIBRE;
+		ecmd->port = PORT_OTHER;
+		ecmd->transceiver = XCVR_EXTERNAL;
+		break;
+	}
+	ecmd->phy_address = ahw->physical_port;
 	return status;
 }
 
···
 	if (test_and_set_bit(__QLCNIC_RESETTING, &adapter->state))
 		return -EIO;
 
-	ret = qlcnic_83xx_diag_alloc_res(netdev, QLCNIC_INTERRUPT_TEST);
+	ret = qlcnic_83xx_diag_alloc_res(netdev, QLCNIC_INTERRUPT_TEST,
+					 max_sds_rings);
 	if (ret)
 		goto fail_diag_irq;
 

drivers/net/ethernet/qlogic/qlcnic/qlcnic_83xx_hw.h

···
 
 void qlcnic_83xx_get_minidump_template(struct qlcnic_adapter *);
 void qlcnic_83xx_get_stats(struct qlcnic_adapter *adapter, u64 *data);
-int qlcnic_83xx_get_settings(struct qlcnic_adapter *);
+int qlcnic_83xx_get_settings(struct qlcnic_adapter *, struct ethtool_cmd *);
 int qlcnic_83xx_set_settings(struct qlcnic_adapter *, struct ethtool_cmd *);
 void qlcnic_83xx_get_pauseparam(struct qlcnic_adapter *,
 				struct ethtool_pauseparam *);
···
 int qlcnic_83xx_enable_flash_write(struct qlcnic_adapter *);
 int qlcnic_83xx_disable_flash_write(struct qlcnic_adapter *);
 u32 qlcnic_83xx_mac_rcode(struct qlcnic_adapter *);
-u32 qlcnic_83xx_mbx_poll(struct qlcnic_adapter *);
+u32 qlcnic_83xx_mbx_poll(struct qlcnic_adapter *, u32 *);
 void qlcnic_83xx_enable_mbx_poll(struct qlcnic_adapter *);
 void qlcnic_83xx_disable_mbx_poll(struct qlcnic_adapter *);
 #endif

drivers/net/ethernet/qlogic/qlcnic/qlcnic_83xx_init.c

···
 	}
 done:
 	netif_device_attach(netdev);
-	if (netif_running(netdev)) {
-		netif_carrier_on(netdev);
-		netif_wake_queue(netdev);
-	}
 }
 
 static int qlcnic_83xx_idc_enter_failed_state(struct qlcnic_adapter *adapter,
···
 
 static void qlcnic_83xx_idc_update_idc_params(struct qlcnic_adapter *adapter)
 {
+	struct qlcnic_hardware_context *ahw = adapter->ahw;
+
 	qlcnic_83xx_idc_update_drv_presence_reg(adapter, 1, 1);
-	clear_bit(__QLCNIC_RESETTING, &adapter->state);
 	set_bit(QLC_83XX_MBX_READY, &adapter->ahw->idc.status);
 	qlcnic_83xx_idc_update_audit_reg(adapter, 0, 1);
 	set_bit(QLC_83XX_MODULE_LOADED, &adapter->ahw->idc.status);
-	adapter->ahw->idc.quiesce_req = 0;
-	adapter->ahw->idc.delay = QLC_83XX_IDC_FW_POLL_DELAY;
-	adapter->ahw->idc.err_code = 0;
-	adapter->ahw->idc.collect_dump = 0;
+
+	ahw->idc.quiesce_req = 0;
+	ahw->idc.delay = QLC_83XX_IDC_FW_POLL_DELAY;
+	ahw->idc.err_code = 0;
+	ahw->idc.collect_dump = 0;
+	ahw->reset_context = 0;
+	adapter->tx_timeo_cnt = 0;
+
+	clear_bit(__QLCNIC_RESETTING, &adapter->state);
 }
 
 /**
···
 	/* Check for soft reset request */
 	if (ahw->reset_context &&
 	    !(val & QLC_83XX_IDC_DISABLE_FW_RESET_RECOVERY)) {
+		adapter->ahw->reset_context = 0;
 		qlcnic_83xx_idc_tx_soft_reset(adapter);
 		return ret;
 	}
···
 static int qlcnic_83xx_idc_failed_state(struct qlcnic_adapter *adapter)
 {
 	dev_err(&adapter->pdev->dev, "%s: please restart!!\n", __func__);
+	clear_bit(__QLCNIC_RESETTING, &adapter->state);
 	adapter->ahw->idc.err_code = -EIO;
 
 	return 0;

drivers/net/ethernet/qlogic/qlcnic/qlcnic_ethtool.c

···
 	"ctx_lro_pkt_cnt",
 	"ctx_ip_csum_error",
 	"ctx_rx_pkts_wo_ctx",
-	"ctx_rx_pkts_dropped_wo_sts",
+	"ctx_rx_pkts_drop_wo_sds_on_card",
+	"ctx_rx_pkts_drop_wo_sds_on_host",
 	"ctx_rx_osized_pkts",
 	"ctx_rx_pkts_dropped_wo_rds",
 	"ctx_rx_unexpected_mcast_pkts",
 	"ctx_invalid_mac_address",
-	"ctx_rx_rds_ring_prim_attemoted",
+	"ctx_rx_rds_ring_prim_attempted",
 	"ctx_rx_rds_ring_prim_success",
 	"ctx_num_lro_flows_added",
 	"ctx_num_lro_flows_removed",
···
 qlcnic_get_settings(struct net_device *dev, struct ethtool_cmd *ecmd)
 {
 	struct qlcnic_adapter *adapter = netdev_priv(dev);
+
+	if (qlcnic_82xx_check(adapter))
+		return qlcnic_82xx_get_settings(adapter, ecmd);
+	else if (qlcnic_83xx_check(adapter))
+		return qlcnic_83xx_get_settings(adapter, ecmd);
+
+	return -EIO;
+}
+
+int qlcnic_82xx_get_settings(struct qlcnic_adapter *adapter,
+			     struct ethtool_cmd *ecmd)
+{
 	struct qlcnic_hardware_context *ahw = adapter->ahw;
 	u32 speed, reg;
 	int check_sfp_module = 0;
···
 
 	} else if (adapter->ahw->port_type == QLCNIC_XGBE) {
 		u32 val = 0;
-		if (qlcnic_83xx_check(adapter))
-			qlcnic_83xx_get_settings(adapter);
-		else
-			val = QLCRD32(adapter, QLCNIC_PORT_MODE_ADDR);
+		val = QLCRD32(adapter, QLCNIC_PORT_MODE_ADDR);
 
 		if (val == QLCNIC_PORT_MODE_802_3_AP) {
 			ecmd->supported = SUPPORTED_1000baseT_Full;
···
 			ecmd->advertising = ADVERTISED_10000baseT_Full;
 		}
 
-		if (netif_running(dev) && adapter->ahw->has_link_events) {
-			if (qlcnic_82xx_check(adapter)) {
-				reg = QLCRD32(adapter,
-					      P3P_LINK_SPEED_REG(pcifn));
-				speed = P3P_LINK_SPEED_VAL(pcifn, reg);
-				ahw->link_speed = speed * P3P_LINK_SPEED_MHZ;
-			}
-			ethtool_cmd_speed_set(ecmd, adapter->ahw->link_speed);
-			ecmd->autoneg = adapter->ahw->link_autoneg;
-			ecmd->duplex = adapter->ahw->link_duplex;
+		if (netif_running(adapter->netdev) && ahw->has_link_events) {
+			reg = QLCRD32(adapter, P3P_LINK_SPEED_REG(pcifn));
+			speed = P3P_LINK_SPEED_VAL(pcifn, reg);
+			ahw->link_speed = speed * P3P_LINK_SPEED_MHZ;
+			ethtool_cmd_speed_set(ecmd, ahw->link_speed);
+			ecmd->autoneg = ahw->link_autoneg;
+			ecmd->duplex = ahw->link_duplex;
 			goto skip;
 		}
 
···
 	case QLCNIC_BRDTYPE_P3P_10G_SFP_QT:
 		ecmd->advertising |= ADVERTISED_TP;
 		ecmd->supported |= SUPPORTED_TP;
-		check_sfp_module = netif_running(dev) &&
-				   adapter->ahw->has_link_events;
+		check_sfp_module = netif_running(adapter->netdev) &&
+				   ahw->has_link_events;
 	case QLCNIC_BRDTYPE_P3P_10G_XFP:
 		ecmd->supported |= SUPPORTED_FIBRE;
 		ecmd->advertising |= ADVERTISED_FIBRE;
···
 			ecmd->advertising |=
 				(ADVERTISED_FIBRE | ADVERTISED_TP);
 			ecmd->port = PORT_FIBRE;
-			check_sfp_module = netif_running(dev) &&
-					   adapter->ahw->has_link_events;
+			check_sfp_module = netif_running(adapter->netdev) &&
+					   ahw->has_link_events;
 		} else {
 			ecmd->autoneg = AUTONEG_ENABLE;
 			ecmd->supported |= (SUPPORTED_TP | SUPPORTED_Autoneg);
···
 				(ADVERTISED_TP | ADVERTISED_Autoneg);
 			ecmd->port = PORT_TP;
 		}
-		break;
-	case QLCNIC_BRDTYPE_83XX_10G:
-		ecmd->autoneg = AUTONEG_DISABLE;
-		ecmd->supported |= (SUPPORTED_FIBRE | SUPPORTED_TP);
-		ecmd->advertising |= (ADVERTISED_FIBRE | ADVERTISED_TP);
-		ecmd->port = PORT_FIBRE;
-		check_sfp_module = netif_running(dev) && ahw->has_link_events;
 		break;
 	default:
 		dev_err(&adapter->pdev->dev, "Unsupported board model %d\n",

drivers/net/ethernet/qlogic/qlcnic/qlcnic_hw.h

···
 
 #define QLCNIC_SET_OWNER        1
 #define QLCNIC_CLR_OWNER        0
-#define QLCNIC_MBX_TIMEOUT      10000
+#define QLCNIC_MBX_TIMEOUT      5000
 
 #define QLCNIC_MBX_RSP_OK	1
 #define QLCNIC_MBX_PORT_RSP_OK	0x1a

drivers/net/ethernet/qlogic/qlcnic/qlcnic_main.c

···
 		 "Mac Filter (0=learning is disabled, 1=Driver learning is enabled, 2=FDB learning is enabled)");
 
 int qlcnic_use_msi = 1;
-MODULE_PARM_DESC(use_msi, "MSI interrupt (0=disabled, 1=enabled");
+MODULE_PARM_DESC(use_msi, "MSI interrupt (0=disabled, 1=enabled)");
 module_param_named(use_msi, qlcnic_use_msi, int, 0444);
 
 int qlcnic_use_msi_x = 1;
-MODULE_PARM_DESC(use_msi_x, "MSI-X interrupt (0=disabled, 1=enabled");
+MODULE_PARM_DESC(use_msi_x, "MSI-X interrupt (0=disabled, 1=enabled)");
 module_param_named(use_msi_x, qlcnic_use_msi_x, int, 0444);
 
 int qlcnic_auto_fw_reset = 1;
-MODULE_PARM_DESC(auto_fw_reset, "Auto firmware reset (0=disabled, 1=enabled");
+MODULE_PARM_DESC(auto_fw_reset, "Auto firmware reset (0=disabled, 1=enabled)");
 module_param_named(auto_fw_reset, qlcnic_auto_fw_reset, int, 0644);
 
 int qlcnic_load_fw_file;
-MODULE_PARM_DESC(load_fw_file, "Load firmware from (0=flash, 1=file");
+MODULE_PARM_DESC(load_fw_file, "Load firmware from (0=flash, 1=file)");
 module_param_named(load_fw_file, qlcnic_load_fw_file, int, 0444);
 
 int qlcnic_config_npars;
 module_param(qlcnic_config_npars, int, 0444);
-MODULE_PARM_DESC(qlcnic_config_npars, "Configure NPARs (0=disabled, 1=enabled");
+MODULE_PARM_DESC(qlcnic_config_npars, "Configure NPARs (0=disabled, 1=enabled)");
 
 static int qlcnic_probe(struct pci_dev *pdev, const struct pci_device_id *ent);
 static void qlcnic_remove(struct pci_dev *pdev);
···
 	return 0;
 }
 
+static void qlcnic_delete_adapter_mac(struct qlcnic_adapter *adapter)
+{
+	struct qlcnic_mac_list_s *cur;
+	struct list_head *head;
+
+	list_for_each(head, &adapter->mac_list) {
+		cur = list_entry(head, struct qlcnic_mac_list_s, list);
+		if (!memcmp(adapter->mac_addr, cur->mac_addr, ETH_ALEN)) {
+			qlcnic_sre_macaddr_change(adapter, cur->mac_addr,
+						  0, QLCNIC_MAC_DEL);
+			list_del(&cur->list);
+			kfree(cur);
+			return;
+		}
+	}
+}
+
 static int qlcnic_set_mac(struct net_device *netdev, void *p)
 {
 	struct qlcnic_adapter *adapter = netdev_priv(netdev);
···
 	if (!is_valid_ether_addr(addr->sa_data))
 		return -EINVAL;
 
+	if (!memcmp(adapter->mac_addr, addr->sa_data, ETH_ALEN))
+		return 0;
+
 	if (test_bit(__QLCNIC_DEV_UP, &adapter->state)) {
 		netif_device_detach(netdev);
 		qlcnic_napi_disable(adapter);
 	}
 
+	qlcnic_delete_adapter_mac(adapter);
 	memcpy(adapter->mac_addr, addr->sa_data, netdev->addr_len);
 	memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
 	qlcnic_set_multi(adapter->netdev);
···
 	if (test_bit(__QLCNIC_RESETTING, &adapter->state))
 		return;
 
-	dev_err(&netdev->dev, "transmit timeout, resetting.\n");
-
-	if (++adapter->tx_timeo_cnt >= QLCNIC_MAX_TX_TIMEOUTS)
-		adapter->need_fw_reset = 1;
-	else
+	if (++adapter->tx_timeo_cnt >= QLCNIC_MAX_TX_TIMEOUTS) {
+		netdev_info(netdev, "Tx timeout, reset the adapter.\n");
+		if (qlcnic_82xx_check(adapter))
+			adapter->need_fw_reset = 1;
+		else if (qlcnic_83xx_check(adapter))
+			qlcnic_83xx_idc_request_reset(adapter,
+						      QLCNIC_FORCE_FW_DUMP_KEY);
+	} else {
+		netdev_info(netdev, "Tx timeout, reset adapter context.\n");
 		adapter->ahw->reset_context = 1;
+	}
 }
 
 static struct net_device_stats *qlcnic_get_stats(struct net_device *netdev)

drivers/net/ethernet/qlogic/qlcnic/qlcnic_sriov_common.c

···
 static int qlcnic_sriov_post_bc_msg(struct qlcnic_adapter *adapter, u32 *hdr,
 				    u32 *pay, u8 pci_func, u8 size)
 {
+	u32 rsp, mbx_val, fw_data, rsp_num, mbx_cmd, val, wait_time = 0;
 	struct qlcnic_hardware_context *ahw = adapter->ahw;
 	unsigned long flags;
-	u32 rsp, mbx_val, fw_data, rsp_num, mbx_cmd, val;
 	u16 opcode;
 	u8 mbx_err_code;
 	int i, j;
···
 	 * assume something is wrong.
 	 */
 poll:
-	rsp = qlcnic_83xx_mbx_poll(adapter);
+	rsp = qlcnic_83xx_mbx_poll(adapter, &wait_time);
 	if (rsp != QLCNIC_RCODE_TIMEOUT) {
 		/* Get the FW response data */
 		fw_data = readl(QLCNIC_MBX_FW(ahw, 0));
 		if (fw_data &  QLCNIC_MBX_ASYNC_EVENT) {
 			__qlcnic_83xx_process_aen(adapter);
-			mbx_val = QLCRDX(ahw, QLCNIC_HOST_MBX_CTRL);
-			if (mbx_val)
-				goto poll;
+			goto poll;
 		}
 		mbx_err_code = QLCNIC_MBX_STATUS(fw_data);
 		rsp_num = QLCNIC_MBX_NUM_REGS(fw_data);

drivers/net/ethernet/qlogic/qlcnic/qlcnic_sriov_pf.c

···
 	if ((cmd->req.arg[1] >> 16) != vf->rx_ctx_id)
 		return -EINVAL;
 
-	if (!(cmd->req.arg[1] & BIT_8))
-		return -EINVAL;
-
 	return 0;
 }
 

drivers/net/ethernet/qlogic/qlge/qlge_main.c

···
 		if (pci_dma_mapping_error(qdev->pdev, map)) {
 			__free_pages(rx_ring->pg_chunk.page,
 					qdev->lbq_buf_order);
+			rx_ring->pg_chunk.page = NULL;
 			netif_err(qdev, drv, qdev->ndev,
 				  "PCI mapping failed.\n");
 			return -ENOMEM;
···
 		if (++curr_idx == rx_ring->lbq_len)
 			curr_idx = 0;
 
+	}
+	if (rx_ring->pg_chunk.page) {
+		pci_unmap_page(qdev->pdev, rx_ring->pg_chunk.map,
+			ql_lbq_block_size(qdev), PCI_DMA_FROMDEVICE);
+		put_page(rx_ring->pg_chunk.page);
+		rx_ring->pg_chunk.page = NULL;
 	}
 }
 

drivers/net/ethernet/renesas/sh_eth.c

···
 	if (mdp->cd->tsu) {
 		struct resource *rtsu;
 		rtsu = platform_get_resource(pdev, IORESOURCE_MEM, 1);
-		if (!rtsu) {
-			dev_err(&pdev->dev, "Not found TSU resource\n");
-			ret = -ENODEV;
-			goto out_release;
-		}
 		mdp->tsu_addr = devm_ioremap_resource(&pdev->dev, rtsu);
 		if (IS_ERR(mdp->tsu_addr)) {
 			ret = PTR_ERR(mdp->tsu_addr);

drivers/net/ethernet/stmicro/stmmac/Kconfig

···
 config STMMAC_ETH
 	tristate "STMicroelectronics 10/100/1000 Ethernet driver"
-	depends on HAS_IOMEM
+	depends on HAS_IOMEM && HAS_DMA
 	select NET_CORE
 	select MII
 	select PHYLIB

drivers/net/macvlan.c

···
 	}
 
 	if (port->passthru)
-		vlan = list_first_entry(&port->vlans, struct macvlan_dev, list);
+		vlan = list_first_or_null_rcu(&port->vlans,
+					      struct macvlan_dev, list);
 	else
 		vlan = macvlan_hash_lookup(port, eth->h_dest);
 	if (vlan == NULL)
···
 	if (err < 0)
 		goto upper_dev_unlink;
 
-	list_add_tail(&vlan->list, &port->vlans);
+	list_add_tail_rcu(&vlan->list, &port->vlans);
 	netif_stacked_transfer_operstate(lowerdev, dev);
 
 	return 0;
···
 {
 	struct macvlan_dev *vlan = netdev_priv(dev);
 
-	list_del(&vlan->list);
+	list_del_rcu(&vlan->list);
 	unregister_netdevice_queue(dev, head);
 	netdev_upper_dev_unlink(vlan->lowerdev, dev);
 }

drivers/net/ntb_netdev.c

···
 	if (dev == NULL)
 		return;
 
+	list_del(&dev->list);
+
 	ndev = dev->ndev;
 
 	unregister_netdev(ndev);

drivers/net/virtio_net.c

···
 #include <linux/slab.h>
 #include <linux/cpu.h>
 
-static int napi_weight = 128;
+static int napi_weight = NAPI_POLL_WEIGHT;
 module_param(napi_weight, int, 0444);
 
 static bool csum = true, gso = true;

drivers/net/wireless/ath/ath5k/base.c

···
 	int i;
 	bool needreset = false;
 
+	if (!test_bit(ATH_STAT_STARTED, ah->status))
+		return;
+
 	mutex_lock(&ah->lock);
 
 	for (i = 0; i < ARRAY_SIZE(ah->txqs); i++) {
···
 	mmiowb();
 	mutex_unlock(&ah->lock);
 
+	set_bit(ATH_STAT_STARTED, ah->status);
 	ieee80211_queue_delayed_work(ah->hw, &ah->tx_complete_work,
 			msecs_to_jiffies(ATH5K_TX_COMPLETE_POLL_INT));
 
···
 
 	ath5k_stop_tasklets(ah);
 
+	clear_bit(ATH_STAT_STARTED, ah->status);
 	cancel_delayed_work_sync(&ah->tx_complete_work);
 
 	if (!ath5k_modparam_no_hw_rfkill_switch)

drivers/net/wireless/ath/ath9k/Kconfig

···
 
 config ATH9K
 	tristate "Atheros 802.11n wireless cards support"
-	depends on MAC80211
+	depends on MAC80211 && HAS_DMA
 	select ATH9K_HW
 	select MAC80211_LEDS
 	select LEDS_CLASS

drivers/net/wireless/ath/ath9k/ar9565_1p0_initvals.h

···
 	{0x00009d10, 0x01834061},
 	{0x00009d14, 0x00c00400},
 	{0x00009d18, 0x00000000},
-	{0x00009e08, 0x0078230c},
-	{0x00009e24, 0x990bb515},
-	{0x00009e28, 0x126f0000},
+	{0x00009e08, 0x0038230c},
+	{0x00009e24, 0x9907b515},
+	{0x00009e28, 0x126f0600},
 	{0x00009e30, 0x06336f77},
 	{0x00009e34, 0x6af6532f},
 	{0x00009e38, 0x0cc80c00},
···
 
 static const u32 ar9565_1p0_baseband_postamble[][5] = {
 	/* Addr      5G_HT20     5G_HT40     2G_HT40     2G_HT20   */
-	{0x00009810, 0xd00a8005, 0xd00a8005, 0xd00a8005, 0xd00a800d},
+	{0x00009810, 0xd00a8005, 0xd00a8005, 0xd00a8005, 0xd00a8009},
 	{0x00009820, 0x206a022e, 0x206a022e, 0x206a012e, 0x206a01ae},
 	{0x00009824, 0x5ac640d0, 0x5ac640d0, 0x5ac640d0, 0x63c640da},
 	{0x00009828, 0x06903081, 0x06903081, 0x06903881, 0x09143c81},
···
 	{0x00009830, 0x0000059c, 0x0000059c, 0x0000059c, 0x0000059c},
 	{0x00009c00, 0x000000c4, 0x000000c4, 0x000000c4, 0x000000c4},
 	{0x00009e00, 0x0372111a, 0x0372111a, 0x037216a0, 0x037216a0},
-	{0x00009e04, 0x00802020, 0x00802020, 0x00802020, 0x00802020},
-	{0x00009e0c, 0x6c4000e2, 0x6d4000e2, 0x6d4000e2, 0x6c4000d8},
-	{0x00009e10, 0x7ec88d2e, 0x7ec88d2e, 0x7ec84d2e, 0x7ec86d2e},
+	{0x00009e04, 0x00802020, 0x00802020, 0x00142020, 0x00142020},
+	{0x00009e0c, 0x6c4000e2, 0x6d4000e2, 0x6d4000e2, 0x6c4000e2},
+	{0x00009e10, 0x7ec88d2e, 0x7ec88d2e, 0x7ec84d2e, 0x7ec84d2e},
 	{0x00009e14, 0x37b95d5e, 0x37b9605e, 0x3379605e, 0x33795d5e},
 	{0x00009e18, 0x00000000, 0x00000000, 0x00000000, 0x00000000},
 	{0x00009e1c, 0x0001cf9c, 0x0001cf9c, 0x00021f9c, 0x00021f9c},
···
 
 static const u32 ar9565_1p0_Common_rx_gain_table[][2] = {
 	/* Addr      allmodes  */
+	{0x00004050, 0x00300300},
+	{0x0000406c, 0x00100000},
 	{0x0000a000, 0x00010000},
 	{0x0000a004, 0x00030002},
 	{0x0000a008, 0x00050004},
···
 	{0x0000a0b4, 0x00000000},
 	{0x0000a0b8, 0x00000000},
 	{0x0000a0bc, 0x00000000},
-	{0x0000a0c0, 0x001f0000},
-	{0x0000a0c4, 0x01000101},
-	{0x0000a0c8, 0x011e011f},
-	{0x0000a0cc, 0x011c011d},
-	{0x0000a0d0, 0x02030204},
-	{0x0000a0d4, 0x02010202},
-	{0x0000a0d8, 0x021f0200},
-	{0x0000a0dc, 0x0302021e},
-	{0x0000a0e0, 0x03000301},
-	{0x0000a0e4, 0x031e031f},
-	{0x0000a0e8, 0x0402031d},
-	{0x0000a0ec, 0x04000401},
-	{0x0000a0f0, 0x041e041f},
-	{0x0000a0f4, 0x0502041d},
-	{0x0000a0f8, 0x05000501},
-	{0x0000a0fc, 0x051e051f},
-	{0x0000a100, 0x06010602},
-	{0x0000a104, 0x061f0600},
-	{0x0000a108, 0x061d061e},
-	{0x0000a10c, 0x07020703},
-	{0x0000a110, 0x07000701},
+	{0x0000a0c0, 0x00bf00a0},
+	{0x0000a0c4, 0x11a011a1},
+	{0x0000a0c8, 0x11be11bf},
+	{0x0000a0cc, 0x11bc11bd},
+	{0x0000a0d0, 0x22632264},
+	{0x0000a0d4, 0x22612262},
+	{0x0000a0d8, 0x227f2260},
+	{0x0000a0dc, 0x4322227e},
+	{0x0000a0e0, 0x43204321},
+	{0x0000a0e4, 0x433e433f},
+	{0x0000a0e8, 0x4462433d},
+	{0x0000a0ec, 0x44604461},
+	{0x0000a0f0, 0x447e447f},
+	{0x0000a0f4, 0x5582447d},
+	{0x0000a0f8, 0x55805581},
+	{0x0000a0fc, 0x559e559f},
+	{0x0000a100, 0x66816682},
+	{0x0000a104, 0x669f6680},
+	{0x0000a108, 0x669d669e},
+	{0x0000a10c, 0x77627763},
+	{0x0000a110, 0x77607761},
 	{0x0000a114, 0x00000000},
 	{0x0000a118, 0x00000000},
 	{0x0000a11c, 0x00000000},
···
 	{0x0000a134, 0x00000000},
 	{0x0000a138, 0x00000000},
 	{0x0000a13c, 0x00000000},
-	{0x0000a140, 0x001f0000},
-	{0x0000a144, 0x01000101},
-	{0x0000a148, 0x011e011f},
-	{0x0000a14c, 0x011c011d},
-	{0x0000a150, 0x02030204},
-	{0x0000a154, 0x02010202},
-	{0x0000a158, 0x021f0200},
-	{0x0000a15c, 0x0302021e},
-	{0x0000a160, 0x03000301},
-	{0x0000a164, 0x031e031f},
-	{0x0000a168, 0x0402031d},
-	{0x0000a16c, 0x04000401},
-	{0x0000a170, 0x041e041f},
-	{0x0000a174, 0x0502041d},
-	{0x0000a178, 0x05000501},
-	{0x0000a17c, 0x051e051f},
-	{0x0000a180, 0x06010602},
-	{0x0000a184, 0x061f0600},
-	{0x0000a188, 0x061d061e},
-	{0x0000a18c, 0x07020703},
-	{0x0000a190, 0x07000701},
+	{0x0000a140, 0x00bf00a0},
+	{0x0000a144, 0x11a011a1},
+	{0x0000a148, 0x11be11bf},
+	{0x0000a14c, 0x11bc11bd},
+	{0x0000a150, 0x22632264},
+	{0x0000a154, 0x22612262},
+	{0x0000a158, 0x227f2260},
+	{0x0000a15c, 0x4322227e},
+	{0x0000a160, 0x43204321},
+	{0x0000a164, 0x433e433f},
+	{0x0000a168, 0x4462433d},
+	{0x0000a16c, 0x44604461},
+	{0x0000a170, 0x447e447f},
+	{0x0000a174, 0x5582447d},
+	{0x0000a178, 0x55805581},
+	{0x0000a17c, 0x559e559f},
+	{0x0000a180, 0x66816682},
+	{0x0000a184, 0x669f6680},
+	{0x0000a188, 0x669d669e},
+	{0x0000a18c, 0x77e677e7},
+	{0x0000a190, 0x77e477e5},
 	{0x0000a194, 0x00000000},
 	{0x0000a198, 0x00000000},
 	{0x0000a19c, 0x00000000},
···
 
 static const u32 ar9565_1p0_pciephy_clkreq_disable_L1[][2] = {
 	/* Addr      allmodes  */
-	{0x00018c00, 0x18213ede},
+	{0x00018c00, 0x18212ede},
 	{0x00018c04, 0x000801d8},
 	{0x00018c08, 0x0003780c},
 };
···
 	{0x0000a180, 0x66816682},
 	{0x0000a184, 0x669f6680},
 	{0x0000a188, 0x669d669e},
-	{0x0000a18c, 0x77627763},
-	{0x0000a190, 0x77607761},
+	{0x0000a18c, 0x77e677e7},
+	{0x0000a190, 0x77e477e5},
 	{0x0000a194, 0x00000000},
 	{0x0000a198, 0x00000000},
 	{0x0000a19c, 0x00000000},
···
 	{0x0000a2e0, 0xffecec00, 0xffecec00, 0xfd339c84, 0xfd339c84},
 	{0x0000a2e4, 0xfc0f0000, 0xfc0f0000, 0xfec3e000, 0xfec3e000},
 	{0x0000a2e8, 0xfc100000, 0xfc100000, 0xfffc0000, 0xfffc0000},
-	{0x0000a410, 0x000050d9, 0x000050d9, 0x000050d9, 0x000050d9},
+	{0x0000a410, 0x000050d9, 0x000050d9, 0x000050df, 0x000050df},
 	{0x0000a500, 0x00002220, 0x00002220, 0x00000000, 0x00000000},
 	{0x0000a504, 0x06002223, 0x06002223, 0x04000002, 0x04000002},
 	{0x0000a508, 0x0b022220, 0x0b022220, 0x08000004, 0x08000004},
···
 	{0x0000a558, 0x69027f56, 0x69027f56, 0x53001ce5, 0x53001ce5},
 	{0x0000a55c, 0x6d029f56, 0x6d029f56, 0x57001ce9, 0x57001ce9},
 	{0x0000a560, 0x73049f56, 0x73049f56, 0x5b001ceb, 0x5b001ceb},
-	{0x0000a564, 0x7804ff56, 0x7804ff56, 0x5d001eec, 0x5d001eec},
-	{0x0000a568, 0x7804ff56, 0x7804ff56, 0x5d001eec, 0x5d001eec},
-	{0x0000a56c, 0x7804ff56, 0x7804ff56, 0x5d001eec, 0x5d001eec},
-	{0x0000a570, 0x7804ff56, 0x7804ff56, 0x5d001eec, 0x5d001eec},
-	{0x0000a574, 0x7804ff56, 0x7804ff56, 0x5d001eec, 0x5d001eec},
-	{0x0000a578, 0x7804ff56, 0x7804ff56, 0x5d001eec, 0x5d001eec},
-	{0x0000a57c, 0x7804ff56, 0x7804ff56, 0x5d001eec, 0x5d001eec},
+	{0x0000a564, 0x7804ff56, 0x7804ff56, 0x60001cf0, 0x60001cf0},
+	{0x0000a568, 0x7804ff56, 0x7804ff56, 0x61001cf1, 0x61001cf1},
+	{0x0000a56c, 0x7804ff56, 0x7804ff56, 0x62001cf2, 0x62001cf2},
+	{0x0000a570, 0x7804ff56, 0x7804ff56, 0x63001cf3, 0x63001cf3},
+	{0x0000a574, 0x7804ff56, 0x7804ff56, 0x64001cf4, 0x64001cf4},
+	{0x0000a578, 0x7804ff56, 0x7804ff56, 0x66001ff6, 0x66001ff6},
+	{0x0000a57c, 0x7804ff56, 0x7804ff56, 0x66001ff6, 0x66001ff6},
 	{0x0000a600, 0x00000000, 0x00000000, 0x00000000, 0x00000000},
 	{0x0000a604, 0x00000000, 0x00000000, 0x00000000, 0x00000000},
 	{0x0000a608, 0x00000000, 0x00000000, 0x00000000, 0x00000000},
···
 	{0x0000a2e0, 0xffecec00, 0xffecec00, 0xfd339c84, 0xfd339c84},
 	{0x0000a2e4, 0xfc0f0000, 0xfc0f0000, 0xfec3e000, 0xfec3e000},
 	{0x0000a2e8, 0xfc100000, 0xfc100000, 0xfffc0000, 0xfffc0000},
-	{0x0000a410, 0x000050d9, 0x000050d9, 0x000050d9, 0x000050d9},
+	{0x0000a410, 0x000050d9, 0x000050d9, 0x000050df, 0x000050df},
 	{0x0000a500, 0x00002220, 0x00002220, 0x00000000, 0x00000000},
 	{0x0000a504, 0x06002223, 0x06002223, 0x04000002, 0x04000002},
 	{0x0000a508, 0x0a022220, 0x0a022220, 0x08000004, 0x08000004},
···
 	{0x0000a558, 0x66027f56, 0x66027f56, 0x4c001ce5, 0x4c001ce5},
 	{0x0000a55c, 0x6a029f56, 0x6a029f56, 0x50001ce9, 0x50001ce9},
 	{0x0000a560, 0x70049f56, 0x70049f56, 0x54001ceb, 0x54001ceb},
-	{0x0000a564, 0x7504ff56, 0x7504ff56, 0x56001eec, 0x56001eec},
-	{0x0000a568, 0x7504ff56, 0x7504ff56, 0x56001eec, 0x56001eec},
-	{0x0000a56c, 0x7504ff56, 0x7504ff56, 0x56001eec, 0x56001eec},
-	{0x0000a570, 0x7504ff56, 0x7504ff56, 0x56001eec, 0x56001eec},
-	{0x0000a574, 0x7504ff56, 0x7504ff56, 0x56001eec, 0x56001eec},
-	{0x0000a578, 0x7504ff56, 0x7504ff56, 0x56001eec, 0x56001eec},
-	{0x0000a57c, 0x7504ff56, 0x7504ff56, 0x56001eec, 0x56001eec},
+	{0x0000a564, 0x7504ff56, 0x7504ff56, 0x59001cf0, 0x59001cf0},
+	{0x0000a568, 0x7504ff56, 0x7504ff56, 0x5a001cf1, 0x5a001cf1},
+	{0x0000a56c, 0x7504ff56, 0x7504ff56, 0x5b001cf2, 0x5b001cf2},
+	{0x0000a570, 0x7504ff56, 0x7504ff56, 0x5c001cf3, 0x5c001cf3},
+	{0x0000a574, 0x7504ff56, 0x7504ff56, 0x5d001cf4, 0x5d001cf4},
+	{0x0000a578, 0x7504ff56, 0x7504ff56, 0x5f001ff6, 0x5f001ff6},
+	{0x0000a57c, 0x7504ff56, 0x7504ff56, 0x5f001ff6, 0x5f001ff6},
 	{0x0000a600, 0x00000000, 0x00000000, 0x00000000, 0x00000000},
 	{0x0000a604, 0x00000000, 0x00000000, 0x00000000, 0x00000000},
 	{0x0000a608, 0x00000000, 0x00000000, 0x00000000, 0x00000000},

drivers/net/wireless/ath/ath9k/main.c

···
 		if (!test_bit(SC_OP_BEACONS, &sc->sc_flags))
 			goto work;
 
-		ath9k_set_beacon(sc);
-
 		if (ah->opmode == NL80211_IFTYPE_STATION &&
 		    test_bit(SC_OP_PRIM_STA_VIF, &sc->sc_flags)) {
 			spin_lock_irqsave(&sc->sc_pm_lock, flags);
 			sc->ps_flags |= PS_BEACON_SYNC | PS_WAIT_FOR_BEACON;
 			spin_unlock_irqrestore(&sc->sc_pm_lock, flags);
+		} else {
+			ath9k_set_beacon(sc);
 		}
 	work:
 		ath_restart_work(sc);
···
 	struct ath_common *common = ath9k_hw_common(sc->sc_ah);
 	struct ath_node *an = (struct ath_node *) sta->drv_priv;
 	struct ieee80211_key_conf ps_key = { };
+	int key;
 
 	ath_node_attach(sc, sta, vif);
 
···
 	    vif->type != NL80211_IFTYPE_AP_VLAN)
 		return 0;
 
-	an->ps_key = ath_key_config(common, vif, sta, &ps_key);
+	key = ath_key_config(common, vif, sta, &ps_key);
+	if (key > 0)
+		an->ps_key = key;
 
 	return 0;
 }
···
 	    return;
 
 	ath_key_delete(common, &ps_key);
+	an->ps_key = 0;
 }
 
 static int ath9k_sta_remove(struct ieee80211_hw *hw,

drivers/net/wireless/b43/dma.c

···
 	sync_descbuffer_for_device(ring, dmaaddr, ring->rx_buffersize);
 }
 
+void b43_dma_handle_rx_overflow(struct b43_dmaring *ring)
+{
+	int current_slot, previous_slot;
+
+	B43_WARN_ON(ring->tx);
+
+	/* Device has filled all buffers, drop all packets and let TCP
+	 * decrease speed.
+	 * Decrement RX index by one will let the device to see all slots
+	 * as free again
+	 */
+	/*
+	*TODO: How to increase rx_drop in mac80211?
+	*/
+	current_slot = ring->ops->get_current_rxslot(ring);
+	previous_slot = prev_slot(ring, current_slot);
+	ring->ops->set_current_rxslot(ring, previous_slot);
+}
+
 void b43_dma_rx(struct b43_dmaring *ring)
 {
 	const struct b43_dma_ops *ops = ring->ops;

drivers/net/wireless/b43/dma.h

···
 /* DMA-Interrupt reasons. */
 #define B43_DMAIRQ_FATALMASK	((1 << 10) | (1 << 11) | (1 << 12) \
 					 | (1 << 14) | (1 << 15))
-#define B43_DMAIRQ_NONFATALMASK	(1 << 13)
+#define B43_DMAIRQ_RDESC_UFLOW		(1 << 13)
 #define B43_DMAIRQ_RX_DONE		(1 << 16)
 
 /*** 32-bit DMA Engine. ***/
···
 	       struct sk_buff *skb);
 void b43_dma_handle_txstatus(struct b43_wldev *dev,
 			     const struct b43_txstatus *status);
+
+void b43_dma_handle_rx_overflow(struct b43_dmaring *ring);
 
 void b43_dma_rx(struct b43_dmaring *ring);
 

drivers/net/wireless/b43/main.c

···
 		}
 	}
 
-	if (unlikely(merged_dma_reason & (B43_DMAIRQ_FATALMASK |
-					  B43_DMAIRQ_NONFATALMASK))) {
-		if (merged_dma_reason & B43_DMAIRQ_FATALMASK) {
-			b43err(dev->wl, "Fatal DMA error: "
-			       "0x%08X, 0x%08X, 0x%08X, "
-			       "0x%08X, 0x%08X, 0x%08X\n",
-			       dma_reason[0], dma_reason[1],
-			       dma_reason[2], dma_reason[3],
-			       dma_reason[4], dma_reason[5]);
-			b43err(dev->wl, "This device does not support DMA "
+	if (unlikely(merged_dma_reason & (B43_DMAIRQ_FATALMASK))) {
+		b43err(dev->wl,
+			"Fatal DMA error: 0x%08X, 0x%08X, 0x%08X, 0x%08X, 0x%08X, 0x%08X\n",
+			dma_reason[0], dma_reason[1],
+			dma_reason[2], dma_reason[3],
+			dma_reason[4], dma_reason[5]);
+		b43err(dev->wl, "This device does not support DMA "
 			       "on your system. It will now be switched to PIO.\n");
-			/* Fall back to PIO transfers if we get fatal DMA errors! */
-			dev->use_pio = true;
-			b43_controller_restart(dev, "DMA error");
-			return;
-		}
-		if (merged_dma_reason & B43_DMAIRQ_NONFATALMASK) {
-			b43err(dev->wl, "DMA error: "
-			       "0x%08X, 0x%08X, 0x%08X, "
-			       "0x%08X, 0x%08X, 0x%08X\n",
-			       dma_reason[0], dma_reason[1],
-			       dma_reason[2], dma_reason[3],
-			       dma_reason[4], dma_reason[5]);
-		}
+		/* Fall back to PIO transfers if we get fatal DMA errors! */
+		dev->use_pio = true;
+		b43_controller_restart(dev, "DMA error");
+		return;
 	}
 
 	if (unlikely(reason & B43_IRQ_UCODE_DEBUG))
···
 		handle_irq_noise(dev);
 
 	/* Check the DMA reason registers for received data. */
+	if (dma_reason[0] & B43_DMAIRQ_RDESC_UFLOW) {
+		if (B43_DEBUG)
+			b43warn(dev->wl, "RX descriptor underrun\n");
+		b43_dma_handle_rx_overflow(dev->dma.rx_ring);
+	}
 	if (dma_reason[0] & B43_DMAIRQ_RX_DONE) {
 		if (b43_using_pio_transfers(dev))
 			b43_pio_rx(dev->pio.rx_queue);
···
 		return IRQ_NONE;
 
 	dev->dma_reason[0] = b43_read32(dev, B43_MMIO_DMA0_REASON)
-	    & 0x0001DC00;
+	    & 0x0001FC00;
 	dev->dma_reason[1] = b43_read32(dev, B43_MMIO_DMA1_REASON)
 	    & 0x0000DC00;
 	dev->dma_reason[2] = b43_read32(dev, B43_MMIO_DMA2_REASON)
···
 		b43_write32(dev, 0x018C, 0x02000000);
 	}
 	b43_write32(dev, B43_MMIO_GEN_IRQ_REASON, 0x00004000);
-	b43_write32(dev, B43_MMIO_DMA0_IRQ_MASK, 0x0001DC00);
+	b43_write32(dev, B43_MMIO_DMA0_IRQ_MASK, 0x0001FC00);
 	b43_write32(dev, B43_MMIO_DMA1_IRQ_MASK, 0x0000DC00);
 	b43_write32(dev, B43_MMIO_DMA2_IRQ_MASK, 0x0000DC00);
 	b43_write32(dev, B43_MMIO_DMA3_IRQ_MASK, 0x0001DC00);

drivers/net/wireless/iwlegacy/4965-mac.c

···
 	hw->flags =
 	    IEEE80211_HW_SIGNAL_DBM | IEEE80211_HW_AMPDU_AGGREGATION |
 	    IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC | IEEE80211_HW_SPECTRUM_MGMT |
-	    IEEE80211_HW_REPORTS_TX_ACK_STATUS | IEEE80211_HW_SUPPORTS_PS |
-	    IEEE80211_HW_SUPPORTS_DYNAMIC_PS;
+	    IEEE80211_HW_SUPPORTS_PS | IEEE80211_HW_SUPPORTS_DYNAMIC_PS;
 	if (il->cfg->sku & IL_SKU_N)
 		hw->flags |=
 		    IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS |

drivers/net/wireless/mwifiex/cfg80211.c

···
 	if (wdev->netdev->reg_state == NETREG_REGISTERED)
 		unregister_netdevice(wdev->netdev);
 
-	if (wdev->netdev->reg_state == NETREG_UNREGISTERED)
-		free_netdev(wdev->netdev);
-
 	/* Clear the priv in adapter */
 	priv->netdev = NULL;
 

drivers/net/wireless/mwifiex/cmdevt.c

···
 	adapter->if_ops.wakeup(adapter);
 	adapter->hs_activated = false;
 	adapter->is_hs_configured = false;
+	adapter->is_suspended = false;
 	mwifiex_hs_activated_event(mwifiex_get_priv(adapter,
 						    MWIFIEX_BSS_ROLE_ANY),
 				   false);

drivers/net/wireless/mwifiex/main.c

···
 						struct net_device *dev)
 {
 	dev->netdev_ops = &mwifiex_netdev_ops;
+	dev->destructor = free_netdev;
 	/* Initialize private structure */
 	priv->current_key_index = 0;
 	priv->media_connected = false;

drivers/net/wireless/mwifiex/sta_ioctl.c

···
 	} else {
 		/* Multicast */
 		priv->curr_pkt_filter &= ~HostCmd_ACT_MAC_PROMISCUOUS_ENABLE;
-		if (mcast_list->mode == MWIFIEX_MULTICAST_MODE) {
+		if (mcast_list->mode == MWIFIEX_ALL_MULTI_MODE) {
 			dev_dbg(priv->adapter->dev,
 				"info: Enabling All Multicast!\n");
 			priv->curr_pkt_filter |=
···
 				dev_dbg(priv->adapter->dev,
 					"info: Set multicast list=%d\n",
 				       mcast_list->num_multicast_addr);
-				/* Set multicast addresses to firmware */
-				if (old_pkt_filter == priv->curr_pkt_filter) {
-					/* Send request to firmware */
-					ret = mwifiex_send_cmd_async(priv,
-						HostCmd_CMD_MAC_MULTICAST_ADR,
-						HostCmd_ACT_GEN_SET, 0,
-						mcast_list);
-				} else {
-					/* Send request to firmware */
-					ret = mwifiex_send_cmd_async(priv,
-						HostCmd_CMD_MAC_MULTICAST_ADR,
-						HostCmd_ACT_GEN_SET, 0,
-						mcast_list);
-				}
+				/* Send multicast addresses to firmware */
+				ret = mwifiex_send_cmd_async(priv,
+					HostCmd_CMD_MAC_MULTICAST_ADR,
+					HostCmd_ACT_GEN_SET, 0,
+					mcast_list);
 			}
 		}
 	}

drivers/ntb/ntb_hw.c

···
  */
 void __iomem *ntb_get_mw_vbase(struct ntb_device *ndev, unsigned int mw)
 {
-	if (mw > NTB_NUM_MW)
+	if (mw >= NTB_NUM_MW)
 		return NULL;
 
 	return ndev->mw[mw].vbase;
···
  */
 resource_size_t ntb_get_mw_size(struct ntb_device *ndev, unsigned int mw)
 {
-	if (mw > NTB_NUM_MW)
+	if (mw >= NTB_NUM_MW)
 		return 0;
 
 	return ndev->mw[mw].bar_sz;
···
  */
 void ntb_set_mw_addr(struct ntb_device *ndev, unsigned int mw, u64 addr)
 {
-	if (mw > NTB_NUM_MW)
+	if (mw >= NTB_NUM_MW)
 		return;
 
 	dev_dbg(&ndev->pdev->dev, "Writing addr %Lx to BAR %d\n", addr,
···
 		ndev->mw[i].vbase =
 		    ioremap_wc(pci_resource_start(pdev, MW_TO_BAR(i)),
 			       ndev->mw[i].bar_sz);
-		dev_info(&pdev->dev, "MW %d size %d\n", i,
-			 (u32) pci_resource_len(pdev, MW_TO_BAR(i)));
+		dev_info(&pdev->dev, "MW %d size %llu\n", i,
+			 pci_resource_len(pdev, MW_TO_BAR(i)));
 		if (!ndev->mw[i].vbase) {
 			dev_warn(&pdev->dev, "Cannot remap BAR %d\n",
 				 MW_TO_BAR(i));

drivers/ntb/ntb_transport.c

···
 #include <linux/ntb.h>
 #include "ntb_hw.h"
 
-#define NTB_TRANSPORT_VERSION	2
+#define NTB_TRANSPORT_VERSION	3
 
 static unsigned int transport_mtu = 0x401E;
 module_param(transport_mtu, uint, 0644);
···
 
 enum {
 	VERSION = 0,
-	MW0_SZ,
-	MW1_SZ,
-	NUM_QPS,
 	QP_LINKS,
+	NUM_QPS,
+	NUM_MWS,
+	MW0_SZ_HIGH,
+	MW0_SZ_LOW,
+	MW1_SZ_HIGH,
+	MW1_SZ_LOW,
 	MAX_SPAD,
 };
 
···
 {
 	struct ntb_transport_client_dev *client_dev;
 	struct ntb_transport *nt;
-	int rc;
+	int rc, i = 0;
 
 	if (list_empty(&ntb_transport_list))
 		return -ENODEV;
···
 		dev = &client_dev->dev;
 
 		/* setup and register client devices */
-		dev_set_name(dev, "%s", device_name);
+		dev_set_name(dev, "%s%d", device_name, i);
 		dev->bus = &ntb_bus_type;
 		dev->release = ntb_client_release;
 		dev->parent = &ntb_query_pdev(nt->ndev)->dev;
···
 		}
 
 		list_add_tail(&client_dev->entry, &nt->client_devs);
+		i++;
 	}
 
 	return 0;
···
 			     (qp_num / NTB_NUM_MW * rx_size);
 	rx_size -= sizeof(struct ntb_rx_info);
 
-	qp->rx_buff = qp->remote_rx_info + sizeof(struct ntb_rx_info);
-	qp->rx_max_frame = min(transport_mtu, rx_size);
+	qp->rx_buff = qp->remote_rx_info + 1;
+	/* Due to housekeeping, there must be atleast 2 buffs */
+	qp->rx_max_frame = min(transport_mtu, rx_size / 2);
 	qp->rx_max_entry = rx_size / qp->rx_max_frame;
 	qp->rx_index = 0;
 
-	qp->remote_rx_info->entry = qp->rx_max_entry;
+	qp->remote_rx_info->entry = qp->rx_max_entry - 1;
 
 	/* setup the hdr offsets with 0's */
 	for (i = 0; i < qp->rx_max_entry; i++) {
···
 
 	qp->rx_pkts = 0;
 	qp->tx_pkts = 0;
+	qp->tx_index = 0;
+}
+
+static void ntb_free_mw(struct ntb_transport *nt, int num_mw)
+{
+	struct ntb_transport_mw *mw = &nt->mw[num_mw];
+	struct pci_dev *pdev = ntb_query_pdev(nt->ndev);
+
+	if (!mw->virt_addr)
+		return;
+
+	dma_free_coherent(&pdev->dev, mw->size, mw->virt_addr, mw->dma_addr);
+	mw->virt_addr = NULL;
 }
 
 static int ntb_set_mw(struct ntb_transport *nt, int num_mw, unsigned int size)
···
 	struct ntb_transport_mw *mw = &nt->mw[num_mw];
 	struct pci_dev *pdev = ntb_query_pdev(nt->ndev);
 
+	/* No need to re-setup */
+	if (mw->size == ALIGN(size, 4096))
+		return 0;
+
+	if (mw->size != 0)
+		ntb_free_mw(nt, num_mw);
+
 	/* Alloc memory for receiving data.  Must be 4k aligned */
 	mw->size = ALIGN(size, 4096);
 
 	mw->virt_addr = dma_alloc_coherent(&pdev->dev, mw->size, &mw->dma_addr,
 					   GFP_KERNEL);
 	if (!mw->virt_addr) {
+		mw->size = 0;
 		dev_err(&pdev->dev, "Unable to allocate MW buffer of size %d\n",
 		       (int) mw->size);
 		return -ENOMEM;
···
 	u32 val;
 	int rc, i;
 
-	/* send the local info */
-	rc = ntb_write_remote_spad(ndev, VERSION, NTB_TRANSPORT_VERSION);
-	if (rc) {
-		dev_err(&pdev->dev, "Error writing %x to remote spad %d\n",
-			0, VERSION);
-		goto out;
+	/* send the local info, in the opposite order of the way we read it */
+	for (i = 0; i < NTB_NUM_MW; i++) {
+		rc = ntb_write_remote_spad(ndev, MW0_SZ_HIGH + (i * 2),
+					   ntb_get_mw_size(ndev, i) >> 32);
+		if (rc) {
+			dev_err(&pdev->dev, "Error writing %u to remote spad %d\n",
+				(u32)(ntb_get_mw_size(ndev, i) >> 32),
+				MW0_SZ_HIGH + (i * 2));
+			goto out;
+		}
+
+		rc = ntb_write_remote_spad(ndev, MW0_SZ_LOW + (i * 2),
+					   (u32) ntb_get_mw_size(ndev, i));
+		if (rc) {
+			dev_err(&pdev->dev, "Error writing %u to remote spad %d\n",
+				(u32) ntb_get_mw_size(ndev, i),
+				MW0_SZ_LOW + (i * 2));
+			goto out;
+		}
 	}
 
-	rc = ntb_write_remote_spad(ndev, MW0_SZ, ntb_get_mw_size(ndev, 0));
+	rc = ntb_write_remote_spad(ndev, NUM_MWS, NTB_NUM_MW);
 	if (rc) {
 		dev_err(&pdev->dev, "Error writing %x to remote spad %d\n",
-			(u32) ntb_get_mw_size(ndev, 0), MW0_SZ);
-		goto out;
-	}
-
-	rc = ntb_write_remote_spad(ndev, MW1_SZ, ntb_get_mw_size(ndev, 1));
-	if (rc) {
-		dev_err(&pdev->dev, "Error writing %x to remote spad %d\n",
-			(u32) ntb_get_mw_size(ndev, 1), MW1_SZ);
+			NTB_NUM_MW, NUM_MWS);
 		goto out;
 	}
 
···
 		goto out;
 	}
 
-	rc = ntb_read_local_spad(nt->ndev, QP_LINKS, &val);
-	if (rc) {
-		dev_err(&pdev->dev, "Error reading spad %d\n", QP_LINKS);
-		goto out;
-	}
-
-	rc = ntb_write_remote_spad(ndev, QP_LINKS, val);
+	rc = ntb_write_remote_spad(ndev, VERSION, NTB_TRANSPORT_VERSION);
 	if (rc) {
 		dev_err(&pdev->dev, "Error writing %x to remote spad %d\n",
-			val, QP_LINKS);
+			NTB_TRANSPORT_VERSION, VERSION);
 		goto out;
 	}
 
···
 		goto out;
 	dev_dbg(&pdev->dev, "Remote max number of qps = %d\n", val);
 
-	rc = ntb_read_remote_spad(ndev, MW0_SZ, &val);
+	rc = ntb_read_remote_spad(ndev, NUM_MWS, &val);
 	if (rc) {
-		dev_err(&pdev->dev, "Error reading remote spad %d\n", MW0_SZ);
+		dev_err(&pdev->dev, "Error reading remote spad %d\n", NUM_MWS);
 		goto out;
 	}
 
-	if (!val)
+	if (val != NTB_NUM_MW)
 		goto out;
-	dev_dbg(&pdev->dev, "Remote MW0 size = %d\n", val);
+	dev_dbg(&pdev->dev, "Remote number of mws = %d\n", val);
 
-	rc = ntb_set_mw(nt, 0, val);
-	if (rc)
-		goto out;
+	for (i = 0; i < NTB_NUM_MW; i++) {
+		u64 val64;
 
-	rc = ntb_read_remote_spad(ndev, MW1_SZ, &val);
-	if (rc) {
-		dev_err(&pdev->dev, "Error reading remote spad %d\n", MW1_SZ);
-		goto out;
+		rc = ntb_read_remote_spad(ndev, MW0_SZ_HIGH + (i * 2), &val);
+		if (rc) {
+			dev_err(&pdev->dev, "Error reading remote spad %d\n",
+				MW0_SZ_HIGH + (i * 2));
+			goto out1;
+		}
+
+		val64 = (u64) val << 32;
+
+		rc = ntb_read_remote_spad(ndev, MW0_SZ_LOW + (i * 2), &val);
+		if (rc) {
+			dev_err(&pdev->dev, "Error reading remote spad %d\n",
+				MW0_SZ_LOW + (i * 2));
+			goto out1;
+		}
+
+		val64 |= val;
+
+		dev_dbg(&pdev->dev, "Remote MW%d size = %llu\n", i, val64);
+
+		rc = ntb_set_mw(nt, i, val64);
+		if (rc)
+			goto out1;
 	}
-
-	if (!val)
-		goto out;
-	dev_dbg(&pdev->dev, "Remote MW1 size = %d\n", val);
-
-	rc = ntb_set_mw(nt, 1, val);
-	if (rc)
-		goto out;
 
 	nt->transport_link = NTB_LINK_UP;
 
···
 
 	return;
 
+out1:
+	for (i = 0; i < NTB_NUM_MW; i++)
+		ntb_free_mw(nt, i);
 out:
 	if (ntb_hw_link_status(ndev))
 		schedule_delayed_work(&nt->link_work,
···
 		      (qp_num / NTB_NUM_MW * tx_size);
 	tx_size -= sizeof(struct ntb_rx_info);
 
-	qp->tx_mw = qp->rx_info + sizeof(struct ntb_rx_info);
-	qp->tx_max_frame = min(transport_mtu, tx_size);
+	qp->tx_mw = qp->rx_info + 1;
+	/* Due to housekeeping, there must be atleast 2 buffs */
+	qp->tx_max_frame = min(transport_mtu, tx_size / 2);
 	qp->tx_max_entry = tx_size / qp->tx_max_frame;
-	qp->tx_index = 0;
 
 	if (nt->debugfs_dir) {
 		char debugfs_name[4];
···
 	pdev = ntb_query_pdev(nt->ndev);
 
 	for (i = 0; i < NTB_NUM_MW; i++)
-		if (nt->mw[i].virt_addr)
-			dma_free_coherent(&pdev->dev, nt->mw[i].size,
-					  nt->mw[i].virt_addr,
-					  nt->mw[i].dma_addr);
+		ntb_free_mw(nt, i);
 
 	kfree(nt->qps);
 	ntb_unregister_transport(nt->ndev);
···
 static void ntb_transport_rx(unsigned long data)
 {
 	struct ntb_transport_qp *qp = (struct ntb_transport_qp *)data;
-	int rc;
+	int rc, i;
 
-	do {
+	/* Limit the number of packets processed in a single interrupt to
+	 * provide fairness to others
+	 */
+	for (i = 0; i < qp->rx_max_entry; i++) {
 		rc = ntb_process_rxc(qp);
-	} while (!rc);
+		if (rc)
+			break;
+	}
 }
 
 static void ntb_transport_rxc_db(void *data, int db_num)
···
  */
 void ntb_transport_free_queue(struct ntb_transport_qp *qp)
 {
-	struct pci_dev *pdev = ntb_query_pdev(qp->ndev);
+	struct pci_dev *pdev;
 	struct ntb_queue_entry *entry;
 
 	if (!qp)
 		return;
+
+	pdev = ntb_query_pdev(qp->ndev);
 
 	cancel_delayed_work_sync(&qp->link_work);
 
···
  */
 void ntb_transport_link_down(struct ntb_transport_qp *qp)
 {
-	struct pci_dev *pdev = ntb_query_pdev(qp->ndev);
+	struct pci_dev *pdev;
 	int rc, val;
 
 	if (!qp)
 		return;
 
+	pdev = ntb_query_pdev(qp->ndev);
 	qp->client_ready = NTB_LINK_DOWN;
 
 	rc = ntb_read_local_spad(qp->ndev, QP_LINKS, &val);
···
  */
 bool ntb_transport_link_query(struct ntb_transport_qp *qp)
 {
+	if (!qp)
+		return false;
+
 	return qp->qp_link == NTB_LINK_UP;
 }
 EXPORT_SYMBOL_GPL(ntb_transport_link_query);
···
  */
 unsigned char ntb_transport_qp_num(struct ntb_transport_qp *qp)
 {
+	if (!qp)
+		return 0;
+
 	return qp->qp_num;
 }
 EXPORT_SYMBOL_GPL(ntb_transport_qp_num);
···
  */
 unsigned int ntb_transport_max_size(struct ntb_transport_qp *qp)
 {
+	if (!qp)
+		return 0;
+
 	return qp->tx_max_frame - sizeof(struct ntb_payload_header);
 }
 EXPORT_SYMBOL_GPL(ntb_transport_max_size);

drivers/of/base.c

···
 				out_args->args_count = count;
 				for (i = 0; i < count; i++)
 					out_args->args[i] = be32_to_cpup(list++);
+			} else {
+				of_node_put(node);
 			}
 
 			/* Found it! return success */
-			if (node)
-				of_node_put(node);
 			return 0;
 		}
 

drivers/pinctrl/pinctrl-abx500.c

···
 
 	if (abx500_pdata)
 		pdata = abx500_pdata->gpio;
-	if (!pdata) {
-		if (np) {
-			const struct of_device_id *match;
 
-			match = of_match_device(abx500_gpio_match, &pdev->dev);
-			if (!match)
-				return -ENODEV;
-			id = (unsigned long)match->data;
-		} else {
-			dev_err(&pdev->dev, "gpio dt and platform data missing\n");
-			return -ENODEV;
-		}
+	if (!(pdata || np)) {
+		dev_err(&pdev->dev, "gpio dt and platform data missing\n");
+		return -ENODEV;
 	}
-
-	if (platid)
-		id = platid->driver_data;
 
 	pct = devm_kzalloc(&pdev->dev, sizeof(struct abx500_pinctrl),
 				   GFP_KERNEL);
···
 	pct->chip = abx500gpio_chip;
 	pct->chip.dev = &pdev->dev;
 	pct->chip.base = (np) ? -1 : pdata->gpio_base;
+
+	if (platid)
+		id = platid->driver_data;
+	else if (np) {
+		const struct of_device_id *match;
+
+		match = of_match_device(abx500_gpio_match, &pdev->dev);
+		if (match)
+			id = (unsigned long)match->data;
+	}
 
 	/* initialize the lock */
 	mutex_init(&pct->lock);
···
 		abx500_pinctrl_ab8505_init(&pct->soc);
 		break;
 	default:
-		dev_err(&pdev->dev, "Unsupported pinctrl sub driver (%d)\n",
-				(int) platid->driver_data);
+		dev_err(&pdev->dev, "Unsupported pinctrl sub driver (%d)\n", id);
 		mutex_destroy(&pct->lock);
 		return -EINVAL;
 	}

drivers/pinctrl/pinctrl-coh901.c

···
 	gpio->dev = &pdev->dev;
 
 	memres = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (!memres) {
-		dev_err(gpio->dev, "could not get GPIO memory resource\n");
-		return -ENODEV;
-	}
-
 	gpio->base = devm_ioremap_resource(&pdev->dev, memres);
 	if (IS_ERR(gpio->base))
 		return PTR_ERR(gpio->base);

drivers/pinctrl/pinctrl-exynos5440.c

···
 	}
 
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (!res) {
-		dev_err(dev, "cannot find IO resource\n");
-		return -ENOENT;
-	}
-
 	priv->reg_base = devm_ioremap_resource(&pdev->dev, res);
 	if (IS_ERR(priv->reg_base))
 		return PTR_ERR(priv->reg_base);

drivers/pinctrl/pinctrl-lantiq.c

···
 	int i;
 
 	for (i = 0; i < num_maps; i++)
-		if (map[i].type == PIN_MAP_TYPE_CONFIGS_PIN)
+		if (map[i].type == PIN_MAP_TYPE_CONFIGS_PIN ||
+		    map[i].type == PIN_MAP_TYPE_CONFIGS_GROUP)
 			kfree(map[i].data.configs.configs);
 	kfree(map);
 }

drivers/pinctrl/pinctrl-samsung.c

···
 	drvdata->dev = dev;
 
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (!res) {
-		dev_err(dev, "cannot find IO resource\n");
-		return -ENOENT;
-	}
-
 	drvdata->virt_base = devm_ioremap_resource(&pdev->dev, res);
 	if (IS_ERR(drvdata->virt_base))
 		return PTR_ERR(drvdata->virt_base);

drivers/pinctrl/pinctrl-single.c

···
 	(*map)->data.mux.function = np->name;
 
 	if (pcs->is_pinconf) {
-		if (pcs_parse_pinconf(pcs, np, function, map))
+		res = pcs_parse_pinconf(pcs, np, function, map);
+		if (res)
 			goto free_pingroups;
 		*num_maps = 2;
 	} else {

drivers/pinctrl/pinctrl-xway.c

···
 
 	/* get and remap our register range */
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (!res) {
-		dev_err(&pdev->dev, "Failed to get resource\n");
-		return -ENOENT;
-	}
 	xway_info.membase[0] = devm_ioremap_resource(&pdev->dev, res);
 	if (IS_ERR(xway_info.membase[0]))
 		return PTR_ERR(xway_info.membase[0]);

drivers/pinctrl/vt8500/pinctrl-wm8750.c

···
 #define WMT_PIN_EXTGPIO6	WMT_PIN(0, 6)
 #define WMT_PIN_EXTGPIO7	WMT_PIN(0, 7)
 #define WMT_PIN_WAKEUP0		WMT_PIN(0, 16)
-#define WMT_PIN_WAKEUP1		WMT_PIN(0, 16)
+#define WMT_PIN_WAKEUP1		WMT_PIN(0, 17)
 #define WMT_PIN_SD0CD		WMT_PIN(0, 28)
 #define WMT_PIN_VDOUT0		WMT_PIN(1, 0)
 #define WMT_PIN_VDOUT1		WMT_PIN(1, 1)

drivers/pwm/pwm-imx.c

···
 	imx->chip.npwm = 1;
 
 	r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (r == NULL) {
-		dev_err(&pdev->dev, "no memory resource defined\n");
-		return -ENODEV;
-	}
-
 	imx->mmio_base = devm_ioremap_resource(&pdev->dev, r);
 	if (IS_ERR(imx->mmio_base))
 		return PTR_ERR(imx->mmio_base);

drivers/pwm/pwm-puv3.c

···
 		return PTR_ERR(puv3->clk);
 
 	r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (r == NULL) {
-		dev_err(&pdev->dev, "no memory resource defined\n");
-		return -ENODEV;
-	}
-
 	puv3->base = devm_ioremap_resource(&pdev->dev, r);
 	if (IS_ERR(puv3->base))
 		return PTR_ERR(puv3->base);

drivers/pwm/pwm-pxa.c

···
 	pwm->chip.npwm = (id->driver_data & HAS_SECONDARY_PWM) ? 2 : 1;
 
 	r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (r == NULL) {
-		dev_err(&pdev->dev, "no memory resource defined\n");
-		return -ENODEV;
-	}
-
 	pwm->mmio_base = devm_ioremap_resource(&pdev->dev, r);
 	if (IS_ERR(pwm->mmio_base))
 		return PTR_ERR(pwm->mmio_base);

drivers/pwm/pwm-tegra.c

···
 	pwm->dev = &pdev->dev;
 
 	r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (!r) {
-		dev_err(&pdev->dev, "no memory resources defined\n");
-		return -ENODEV;
-	}
-
 	pwm->mmio_base = devm_ioremap_resource(&pdev->dev, r);
 	if (IS_ERR(pwm->mmio_base))
 		return PTR_ERR(pwm->mmio_base);

drivers/pwm/pwm-tiecap.c

···
 	pc->chip.npwm = 1;
 
 	r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (!r) {
-		dev_err(&pdev->dev, "no memory resource defined\n");
-		return -ENODEV;
-	}
-
 	pc->mmio_base = devm_ioremap_resource(&pdev->dev, r);
 	if (IS_ERR(pc->mmio_base))
 		return PTR_ERR(pc->mmio_base);

drivers/pwm/pwm-tiehrpwm.c

···
 	pc->chip.npwm = NUM_PWM_CHANNEL;
 
 	r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (!r) {
-		dev_err(&pdev->dev, "no memory resource defined\n");
-		return -ENODEV;
-	}
-
 	pc->mmio_base = devm_ioremap_resource(&pdev->dev, r);
 	if (IS_ERR(pc->mmio_base))
 		return PTR_ERR(pc->mmio_base);

drivers/pwm/pwm-tipwmss.c

···
 	mutex_init(&info->pwmss_lock);
 
 	r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (!r) {
-		dev_err(&pdev->dev, "no memory resource defined\n");
-		return -ENODEV;
-	}
-
 	info->mmio_base = devm_ioremap_resource(&pdev->dev, r);
 	if (IS_ERR(info->mmio_base))
 		return PTR_ERR(info->mmio_base);

drivers/pwm/pwm-vt8500.c

···
 	}
 
 	r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (r == NULL) {
-		dev_err(&pdev->dev, "no memory resource defined\n");
-		return -ENODEV;
-	}
-
 	chip->base = devm_ioremap_resource(&pdev->dev, r);
 	if (IS_ERR(chip->base))
 		return PTR_ERR(chip->base);

drivers/rtc/Kconfig

···
 config RTC_HCTOSYS
 	bool "Set system time from RTC on startup and resume"
 	default y
-	depends on !ALWAYS_USE_PERSISTENT_CLOCK
 	help
 	  If you say yes here, the system time (wall clock) will be set using
 	  the value read from a specified RTC device. This is useful to avoid
···
 config RTC_SYSTOHC
 	bool "Set the RTC time based on NTP synchronization"
 	default y
-	depends on !ALWAYS_USE_PERSISTENT_CLOCK
 	help
 	  If you say yes here, the system time (wall clock) will be stored
 	  in the RTC specified by RTC_HCTOSYS_DEVICE approximately every 11

drivers/rtc/rtc-nuc900.c

···
 		return -ENOMEM;
 	}
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (!res) {
-		dev_err(&pdev->dev, "platform_get_resource failed\n");
-		return -ENXIO;
-	}
-
 	nuc900_rtc->rtc_reg = devm_ioremap_resource(&pdev->dev, res);
 	if (IS_ERR(nuc900_rtc->rtc_reg))
 		return PTR_ERR(nuc900_rtc->rtc_reg);

drivers/rtc/rtc-omap.c

···
 	}
 
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (!res) {
-		pr_debug("%s: RTC resource data missing\n", pdev->name);
-		return -ENOENT;
-	}
-
 	rtc_base = devm_ioremap_resource(&pdev->dev, res);
 	if (IS_ERR(rtc_base))
 		return PTR_ERR(rtc_base);

drivers/rtc/rtc-s3c.c

···
 	/* get the memory region */
 
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (res == NULL) {
-		dev_err(&pdev->dev, "failed to get memory region resource\n");
-		return -ENOENT;
-	}
-
 	s3c_rtc_base = devm_ioremap_resource(&pdev->dev, res);
 	if (IS_ERR(s3c_rtc_base))
 		return PTR_ERR(s3c_rtc_base);

drivers/rtc/rtc-tegra.c

···
 		return -ENOMEM;
 
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (!res) {
-		dev_err(&pdev->dev,
-			"Unable to allocate resources for device.\n");
-		return -EBUSY;
-	}
-
 	info->rtc_base = devm_ioremap_resource(&pdev->dev, res);
 	if (IS_ERR(info->rtc_base))
 		return PTR_ERR(info->rtc_base);

drivers/spi/spi-atmel.c

···
 	}
 
 	if (xfer->tx_buf)
-		spi_writel(as, TDR, *(u8 *)(xfer->tx_buf));
+		if (xfer->bits_per_word > 8)
+			spi_writel(as, TDR, *(u16 *)(xfer->tx_buf));
+		else
+			spi_writel(as, TDR, *(u8 *)(xfer->tx_buf));
 	else
 		spi_writel(as, TDR, 0);
 
 	dev_dbg(master->dev.parent,
-		"  start pio xfer %p: len %u tx %p rx %p\n",
-		xfer, xfer->len, xfer->tx_buf, xfer->rx_buf);
+		"  start pio xfer %p: len %u tx %p rx %p bitpw %d\n",
+		xfer, xfer->len, xfer->tx_buf, xfer->rx_buf,
+		xfer->bits_per_word);
 
 	/* Enable relevant interrupts */
 	spi_writel(as, IER, SPI_BIT(RDRF) | SPI_BIT(OVRES));
···
 {
 	u8		*txp;
 	u8		*rxp;
+	u16		*txp16;
+	u16		*rxp16;
 	unsigned long	xfer_pos = xfer->len - as->current_remaining_bytes;
 
 	if (xfer->rx_buf) {
-		rxp = ((u8 *)xfer->rx_buf) + xfer_pos;
-		*rxp = spi_readl(as, RDR);
+		if (xfer->bits_per_word > 8) {
+			rxp16 = (u16 *)(((u8 *)xfer->rx_buf) + xfer_pos);
+			*rxp16 = spi_readl(as, RDR);
+		} else {
+			rxp = ((u8 *)xfer->rx_buf) + xfer_pos;
+			*rxp = spi_readl(as, RDR);
+		}
 	} else {
 		spi_readl(as, RDR);
 	}
-
-	as->current_remaining_bytes--;
+	if (xfer->bits_per_word > 8) {
+		as->current_remaining_bytes -= 2;
+		if (as->current_remaining_bytes < 0)
+			as->current_remaining_bytes = 0;
+	} else {
+		as->current_remaining_bytes--;
+	}
 
 	if (as->current_remaining_bytes) {
 		if (xfer->tx_buf) {
-			txp = ((u8 *)xfer->tx_buf) + xfer_pos + 1;
-			spi_writel(as, TDR, *txp);
+			if (xfer->bits_per_word > 8) {
+				txp16 = (u16 *)(((u8 *)xfer->tx_buf)
+							+ xfer_pos + 2);
+				spi_writel(as, TDR, *txp16);
+			} else {
+				txp = ((u8 *)xfer->tx_buf) + xfer_pos + 1;
+				spi_writel(as, TDR, *txp);
+			}
 		} else {
 			spi_writel(as, TDR, 0);
 		}
···
 			}
 		}
 
+		if (xfer->bits_per_word > 8) {
+			if (xfer->len % 2) {
+				dev_dbg(&spi->dev, "buffer len should be 16 bits aligned\n");
+				return -EINVAL;
+			}
+		}
+
 		/* FIXME implement these protocol options!! */
-		if (xfer->speed_hz) {
-			dev_dbg(&spi->dev, "no protocol options yet\n");
+		if (xfer->speed_hz < spi->max_speed_hz) {
+			dev_dbg(&spi->dev, "can't change speed in transfer\n");
 			return -ENOPROTOOPT;
 		}
 

drivers/spi/spi-davinci.c

···
 	},
 	{ },
 };
-MODULE_DEVICE_TABLE(of, davini_spi_of_match);
+MODULE_DEVICE_TABLE(of, davinci_spi_of_match);
 
 /**
  * spi_davinci_get_pdata - Get platform data from DTS binding

drivers/spi/spi-tegra20-sflash.c

···
 	tegra_sflash_parse_dt(tsd);
 
 	r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (!r) {
-		dev_err(&pdev->dev, "No IO memory resource\n");
-		ret = -ENODEV;
-		goto exit_free_master;
-	}
 	tsd->base = devm_ioremap_resource(&pdev->dev, r);
 	if (IS_ERR(tsd->base)) {
 		ret = PTR_ERR(tsd->base);

drivers/spi/spi.c

···
 	spi->dev.parent = &master->dev;
 	spi->dev.bus = &spi_bus_type;
 	spi->dev.release = spidev_release;
-	spi->cs_gpio = -EINVAL;
+	spi->cs_gpio = -ENOENT;
 	device_initialize(&spi->dev);
 	return spi;
 }
···
 	nb = of_gpio_named_count(np, "cs-gpios");
 	master->num_chipselect = max(nb, (int)master->num_chipselect);
 
-	if (nb < 1)
+	/* Return error only for an incorrectly formed cs-gpios property */
+	if (nb == 0 || nb == -ENOENT)
 		return 0;
+	else if (nb < 0)
+		return nb;
 
 	cs = devm_kzalloc(&master->dev,
 			  sizeof(int) * master->num_chipselect,
···
 		return -ENOMEM;
 
 	for (i = 0; i < master->num_chipselect; i++)
-		cs[i] = -EINVAL;
+		cs[i] = -ENOENT;
 
 	for (i = 0; i < nb; i++)
 		cs[i] = of_get_named_gpio(np, "cs-gpios", i);

drivers/staging/dwc2/platform.c

···
 	}
 
 	res = platform_get_resource(dev, IORESOURCE_MEM, 0);
-	if (!res) {
-		dev_err(&dev->dev, "missing memory base resource\n");
-		return -EINVAL;
-	}
-
 	hsotg->regs = devm_ioremap_resource(&dev->dev, res);
 	if (IS_ERR(hsotg->regs))
 		return PTR_ERR(hsotg->regs);

drivers/staging/nvec/nvec.c

···
 	}
 
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (!res) {
-		dev_err(&pdev->dev, "no mem resource?\n");
-		return -ENODEV;
-	}
-
 	base = devm_ioremap_resource(&pdev->dev, res);
 	if (IS_ERR(base))
 		return PTR_ERR(base);

drivers/target/iscsi/iscsi_target.c

···
 
 static void iscsit_do_crypto_hash_buf(
 	struct hash_desc *hash,
-	unsigned char *buf,
+	const void *buf,
 	u32 payload_length,
 	u32 padding,
 	u8 *pad_bytes,
···
 	if (conn->conn_ops->HeaderDigest) {
 		u32 *header_digest = (u32 *)&cmd->pdu[ISCSI_HDR_LEN];
 
-		iscsit_do_crypto_hash_buf(&conn->conn_tx_hash,
-				(unsigned char *)hdr, ISCSI_HDR_LEN,
-				0, NULL, (u8 *)header_digest);
+		iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, hdr,
+				ISCSI_HDR_LEN, 0, NULL, (u8 *)header_digest);
 
 		cmd->tx_size += ISCSI_CRC_LEN;
 		pr_debug("Attaching CRC32C HeaderDigest to"
···
 	if (conn->conn_ops->HeaderDigest) {
 		u32 *header_digest = (u32 *)&cmd->pdu[ISCSI_HDR_LEN];
 
-		iscsit_do_crypto_hash_buf(&conn->conn_tx_hash,
-				(unsigned char *)cmd->pdu, ISCSI_HDR_LEN,
-				0, NULL, (u8 *)header_digest);
+		iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, cmd->pdu,
+				ISCSI_HDR_LEN, 0, NULL, (u8 *)header_digest);
 
 		iov[0].iov_len += ISCSI_CRC_LEN;
 		tx_size += ISCSI_CRC_LEN;
···
 	if (conn->conn_ops->HeaderDigest) {
 		u32 *header_digest = (u32 *)&cmd->pdu[ISCSI_HDR_LEN];
 
-		iscsit_do_crypto_hash_buf(&conn->conn_tx_hash,
-				(unsigned char *)&cmd->pdu[0], ISCSI_HDR_LEN,
-				0, NULL, (u8 *)header_digest);
+		iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, &cmd->pdu[0],
+				ISCSI_HDR_LEN, 0, NULL, (u8 *)header_digest);
 
 		iov[0].iov_len += ISCSI_CRC_LEN;
 		tx_size += ISCSI_CRC_LEN;
···
 	if (conn->conn_ops->HeaderDigest) {
 		u32 *header_digest = (u32 *)&cmd->pdu[ISCSI_HDR_LEN];
 
-		iscsit_do_crypto_hash_buf(&conn->conn_tx_hash,
-				(unsigned char *)hdr, ISCSI_HDR_LEN,
-				0, NULL, (u8 *)header_digest);
+		iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, hdr,
+				ISCSI_HDR_LEN, 0, NULL, (u8 *)header_digest);
 
 		tx_size += ISCSI_CRC_LEN;
 		pr_debug("Attaching CRC32C HeaderDigest to"
···
 	if (conn->conn_ops->HeaderDigest) {
 		u32 *header_digest = (u32 *)&cmd->pdu[ISCSI_HDR_LEN];
 
-		iscsit_do_crypto_hash_buf(&conn->conn_tx_hash,
-				(unsigned char *)hdr, ISCSI_HDR_LEN,
-				0, NULL, (u8 *)header_digest);
+		iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, hdr,
+				ISCSI_HDR_LEN, 0, NULL, (u8 *)header_digest);
 
 		iov[0].iov_len += ISCSI_CRC_LEN;
 		tx_size += ISCSI_CRC_LEN;
···
 	if (conn->conn_ops->HeaderDigest) {
 		u32 *header_digest = (u32 *)&cmd->pdu[ISCSI_HDR_LEN];
 
-		iscsit_do_crypto_hash_buf(&conn->conn_tx_hash,
-				(unsigned char *)hdr, ISCSI_HDR_LEN,
-				0, NULL, (u8 *)header_digest);
+		iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, hdr,
+				ISCSI_HDR_LEN, 0, NULL, (u8 *)header_digest);
 
 		cmd->iov_misc[0].iov_len += ISCSI_CRC_LEN;
 		tx_size += ISCSI_CRC_LEN;
···
 	if (conn->conn_ops->HeaderDigest) {
 		u32 *header_digest = (u32 *)&cmd->pdu[ISCSI_HDR_LEN];
 
-		iscsit_do_crypto_hash_buf(&conn->conn_tx_hash,
-				(unsigned char *)cmd->pdu, ISCSI_HDR_LEN,
-				0, NULL, (u8 *)header_digest);
+		iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, cmd->pdu,
+				ISCSI_HDR_LEN, 0, NULL, (u8 *)header_digest);
 
 		iov[0].iov_len += ISCSI_CRC_LEN;
 		tx_size += ISCSI_CRC_LEN;
···
 	if (conn->conn_ops->HeaderDigest) {
 		u32 *header_digest = (u32 *)&cmd->pdu[ISCSI_HDR_LEN];
 
-		iscsit_do_crypto_hash_buf(&conn->conn_tx_hash,
-				(unsigned char *)hdr, ISCSI_HDR_LEN,
-				0, NULL, (u8 *)header_digest);
+		iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, hdr,
+				ISCSI_HDR_LEN, 0, NULL, (u8 *)header_digest);
 
 		cmd->iov_misc[0].iov_len += ISCSI_CRC_LEN;
 		tx_size += ISCSI_CRC_LEN;
···
 	if (conn->conn_ops->HeaderDigest) {
 		u32 *header_digest = (u32 *)&cmd->pdu[ISCSI_HDR_LEN];
 
-		iscsit_do_crypto_hash_buf(&conn->conn_tx_hash,
-				(unsigned char *)hdr, ISCSI_HDR_LEN,
-				0, NULL, (u8 *)header_digest);
+		iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, hdr,
+				ISCSI_HDR_LEN, 0, NULL, (u8 *)header_digest);
 
 		iov[0].iov_len += ISCSI_CRC_LEN;
 		tx_size += ISCSI_CRC_LEN;
···
 	struct iscsi_cmd *cmd,
 	struct iscsi_conn *conn)
 {
-	u32 iov_count = 0, tx_size = 0;
-	struct iscsi_reject *hdr;
+	struct iscsi_reject *hdr = (struct iscsi_reject *)&cmd->pdu[0];
 	struct kvec *iov;
+	u32 iov_count = 0, tx_size;
 
-	iscsit_build_reject(cmd, conn, (struct iscsi_reject *)&cmd->pdu[0]);
+	iscsit_build_reject(cmd, conn, hdr);
 
 	iov = &cmd->iov_misc[0];
 	iov[iov_count].iov_base = cmd->pdu;
···
 	if (conn->conn_ops->HeaderDigest) {
 		u32 *header_digest = (u32 *)&cmd->pdu[ISCSI_HDR_LEN];
 
-		iscsit_do_crypto_hash_buf(&conn->conn_tx_hash,
-				(unsigned char *)hdr, ISCSI_HDR_LEN,
-				0, NULL, (u8 *)header_digest);
+		iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, hdr,
+				ISCSI_HDR_LEN, 0, NULL, (u8 *)header_digest);
 
 		iov[0].iov_len += ISCSI_CRC_LEN;
 		tx_size += ISCSI_CRC_LEN;
···
 	}
 
 	if (conn->conn_ops->DataDigest) {
-		iscsit_do_crypto_hash_buf(&conn->conn_tx_hash,
-				(unsigned char *)cmd->buf_ptr, ISCSI_HDR_LEN,
-				0, NULL, (u8 *)&cmd->data_crc);
+		iscsit_do_crypto_hash_buf(&conn->conn_tx_hash, cmd->buf_ptr,
+				ISCSI_HDR_LEN, 0, NULL, (u8 *)&cmd->data_crc);
 
 		iov[iov_count].iov_base = &cmd->data_crc;
 		iov[iov_count++].iov_len  = ISCSI_CRC_LEN;

drivers/target/iscsi/iscsi_target_erl1.c

···
 		/*
 		 * CmdSN is greater than the tail of the list.
 		 */
-		if (ooo_tail->cmdsn < ooo_cmdsn->cmdsn)
+		if (iscsi_sna_lt(ooo_tail->cmdsn, ooo_cmdsn->cmdsn))
 			list_add_tail(&ooo_cmdsn->ooo_list,
 					&sess->sess_ooo_cmdsn_list);
 		else {
···
 			 */
 			list_for_each_entry(ooo_tmp, &sess->sess_ooo_cmdsn_list,
 						ooo_list) {
-				if (ooo_tmp->cmdsn < ooo_cmdsn->cmdsn)
+				if (iscsi_sna_lt(ooo_tmp->cmdsn, ooo_cmdsn->cmdsn))
 					continue;
 
+				/* Insert before this entry */
 				list_add(&ooo_cmdsn->ooo_list,
-					&ooo_tmp->ooo_list);
+					ooo_tmp->ooo_list.prev);
 				break;
 			}
 		}

drivers/target/iscsi/iscsi_target_parameters.c

···
 	/*
 	 * Extra parameters for ISER from RFC-5046
 	 */
-	param = iscsi_set_default_param(pl, RDMAEXTENTIONS, INITIAL_RDMAEXTENTIONS,
+	param = iscsi_set_default_param(pl, RDMAEXTENSIONS, INITIAL_RDMAEXTENSIONS,
 			PHASE_OPERATIONAL, SCOPE_SESSION_WIDE, SENDER_BOTH,
 			TYPERANGE_BOOL_AND, USE_LEADING_ONLY);
 	if (!param)
···
 			SET_PSTATE_NEGOTIATE(param);
 		} else if (!strcmp(param->name, OFMARKINT)) {
 			SET_PSTATE_NEGOTIATE(param);
-		} else if (!strcmp(param->name, RDMAEXTENTIONS)) {
+		} else if (!strcmp(param->name, RDMAEXTENSIONS)) {
 			if (iser == true)
 				SET_PSTATE_NEGOTIATE(param);
 		} else if (!strcmp(param->name, INITIATORRECVDATASEGMENTLENGTH)) {
···
 			param->state &= ~PSTATE_NEGOTIATE;
 		else if (!strcmp(param->name, OFMARKINT))
 			param->state &= ~PSTATE_NEGOTIATE;
-		else if (!strcmp(param->name, RDMAEXTENTIONS))
+		else if (!strcmp(param->name, RDMAEXTENSIONS))
 			param->state &= ~PSTATE_NEGOTIATE;
 		else if (!strcmp(param->name, INITIATORRECVDATASEGMENTLENGTH))
 			param->state &= ~PSTATE_NEGOTIATE;
···
 			ops->SessionType = !strcmp(param->value, DISCOVERY);
 			pr_debug("SessionType:                  %s\n",
 				param->value);
-		} else if (!strcmp(param->name, RDMAEXTENTIONS)) {
+		} else if (!strcmp(param->name, RDMAEXTENSIONS)) {
 			ops->RDMAExtensions = !strcmp(param->value, YES);
 			pr_debug("RDMAExtensions:               %s\n",
 				param->value);

drivers/target/iscsi/iscsi_target_parameters.h

···
 /*
  * Parameter names of iSCSI Extentions for RDMA (iSER).  See RFC-5046
  */
-#define RDMAEXTENTIONS			"RDMAExtensions"
+#define RDMAEXTENSIONS			"RDMAExtensions"
 #define INITIATORRECVDATASEGMENTLENGTH	"InitiatorRecvDataSegmentLength"
 #define TARGETRECVDATASEGMENTLENGTH	"TargetRecvDataSegmentLength"
 
···
 /*
  * Initial values for iSER parameters following RFC-5046 Section 6
  */
-#define INITIAL_RDMAEXTENTIONS			NO
+#define INITIAL_RDMAEXTENSIONS			NO
 #define INITIAL_INITIATORRECVDATASEGMENTLENGTH	"262144"
 #define INITIAL_TARGETRECVDATASEGMENTLENGTH	"8192"
 

drivers/target/target_core_configfs.c

···
 	.store	= target_core_store_dev_udev_path,
 };
 
+static ssize_t target_core_show_dev_enable(void *p, char *page)
+{
+	struct se_device *dev = p;
+
+	return snprintf(page, PAGE_SIZE, "%d\n", !!(dev->dev_flags & DF_CONFIGURED));
+}
+
 static ssize_t target_core_store_dev_enable(
 	void *p,
 	const char *page,
···
 static struct target_core_configfs_attribute target_core_attr_dev_enable = {
 	.attr	= { .ca_owner = THIS_MODULE,
 		    .ca_name = "enable",
-		    .ca_mode = S_IWUSR },
-	.show	= NULL,
+		    .ca_mode =  S_IRUGO | S_IWUSR },
+	.show	= target_core_show_dev_enable,
 	.store	= target_core_store_dev_enable,
 };
 

drivers/target/target_core_device.c

···
 		struct se_dev_entry *deve = se_cmd->se_deve;
 
 		deve->total_cmds++;
-		deve->total_bytes += se_cmd->data_length;
 
 		if ((se_cmd->data_direction == DMA_TO_DEVICE) &&
 		    (deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY)) {
···
 			deve->write_bytes += se_cmd->data_length;
 		else if (se_cmd->data_direction == DMA_FROM_DEVICE)
 			deve->read_bytes += se_cmd->data_length;
-
-		deve->deve_cmds++;
 
 		se_lun = deve->se_lun;
 		se_cmd->se_lun = deve->se_lun;
···
 	nacl->device_list = NULL;
 
 	return 0;
-}
-
-void core_dec_lacl_count(struct se_node_acl *se_nacl, struct se_cmd *se_cmd)
-{
-	struct se_dev_entry *deve;
-	unsigned long flags;
-
-	spin_lock_irqsave(&se_nacl->device_list_lock, flags);
-	deve = se_nacl->device_list[se_cmd->orig_fe_lun];
-	deve->deve_cmds--;
-	spin_unlock_irqrestore(&se_nacl->device_list_lock, flags);
 }
 
 void core_update_device_list_access(

drivers/target/target_core_file.c

···
 		struct request_queue *q = bdev_get_queue(inode->i_bdev);
 		unsigned long long dev_size;
 
-		dev->dev_attrib.hw_block_size =
-			bdev_logical_block_size(inode->i_bdev);
-		dev->dev_attrib.hw_max_sectors = queue_max_hw_sectors(q);
-
 		/*
 		 * Determine the number of bytes from i_size_read() minus
 		 * one (1) logical sector from underlying struct block_device
···
 			goto fail;
 		}
 
-		dev->dev_attrib.hw_block_size = FD_BLOCKSIZE;
-		dev->dev_attrib.hw_max_sectors = FD_MAX_SECTORS;
-
 		/*
 		 * Limit UNMAP emulation to 8k Number of LBAs (NoLB)
 		 */
···
 
 	fd_dev->fd_block_size = dev->dev_attrib.hw_block_size;
 
+	dev->dev_attrib.hw_block_size = FD_BLOCKSIZE;
+	dev->dev_attrib.hw_max_sectors = FD_MAX_SECTORS;
 	dev->dev_attrib.hw_queue_depth = FD_MAX_DEVICE_QUEUE_DEPTH;
 
 	if (fd_dev->fbd_flags & FDBD_HAS_BUFFERED_IO_WCE) {

drivers/target/target_core_iblock.c

···
 				rw = WRITE_FUA;
 			else if (!(q->flush_flags & REQ_FLUSH))
 				rw = WRITE_FUA;
+			else
+				rw = WRITE;
 		} else {
 			rw = WRITE;
 		}

drivers/target/target_core_internal.h

···
 struct se_dev_entry *core_get_se_deve_from_rtpi(struct se_node_acl *, u16);
 int	core_free_device_list_for_node(struct se_node_acl *,
 		struct se_portal_group *);
-void	core_dec_lacl_count(struct se_node_acl *, struct se_cmd *);
 void	core_update_device_list_access(u32, u32, struct se_node_acl *);
 int	core_enable_device_list_for_node(struct se_lun *, struct se_lun_acl *,
 		u32, u32, struct se_node_acl *, struct se_portal_group *);

drivers/target/target_core_rd.c

···
 	u32 src_len;
 	u64 tmp;
 
+	if (dev->rd_flags & RDF_NULLIO) {
+		target_complete_cmd(cmd, SAM_STAT_GOOD);
+		return 0;
+	}
+
 	tmp = cmd->t_task_lba * se_dev->dev_attrib.block_size;
 	rd_offset = do_div(tmp, PAGE_SIZE);
 	rd_page = tmp;
···
 }
 
 enum {
-	Opt_rd_pages, Opt_err
+	Opt_rd_pages, Opt_rd_nullio, Opt_err
 };
 
 static match_table_t tokens = {
 	{Opt_rd_pages, "rd_pages=%d"},
+	{Opt_rd_nullio, "rd_nullio=%d"},
 	{Opt_err, NULL}
 };
 
···
 				" Count: %u\n", rd_dev->rd_page_count);
 			rd_dev->rd_flags |= RDF_HAS_PAGE_COUNT;
 			break;
+		case Opt_rd_nullio:
+			match_int(args, &arg);
+			if (arg != 1)
+				break;
+
+			pr_debug("RAMDISK: Setting NULLIO flag: %d\n", arg);
+			rd_dev->rd_flags |= RDF_NULLIO;
+			break;
 		default:
 			break;
 		}
···
 	ssize_t bl = sprintf(b, "TCM RamDisk ID: %u  RamDisk Makeup: rd_mcp\n",
 			rd_dev->rd_dev_id);
 	bl += sprintf(b + bl, "        PAGES/PAGE_SIZE: %u*%lu"
-			"  SG_table_count: %u\n", rd_dev->rd_page_count,
-			PAGE_SIZE, rd_dev->sg_table_count);
+			"  SG_table_count: %u  nullio: %d\n", rd_dev->rd_page_count,
+			PAGE_SIZE, rd_dev->sg_table_count,
+			!!(rd_dev->rd_flags & RDF_NULLIO));
 	return bl;
 }
 

drivers/target/target_core_rd.h

···
 } ____cacheline_aligned;
 
 #define RDF_HAS_PAGE_COUNT	0x01
+#define RDF_NULLIO		0x02
 
 struct rd_dev {
 	struct se_device dev;

drivers/target/target_core_transport.c

···
 		if (wait_for_tasks)
 			transport_wait_for_tasks(cmd);
 
-		core_dec_lacl_count(cmd->se_sess->se_node_acl, cmd);
-
 		if (cmd->se_lun)
 			transport_lun_remove_cmd(cmd);
 
···
 {
 	struct se_cmd *se_cmd = container_of(kref, struct se_cmd, cmd_kref);
 	struct se_session *se_sess = se_cmd->se_sess;
-	unsigned long flags;
 
-	spin_lock_irqsave(&se_sess->sess_cmd_lock, flags);
 	if (list_empty(&se_cmd->se_cmd_list)) {
-		spin_unlock_irqrestore(&se_sess->sess_cmd_lock, flags);
+		spin_unlock(&se_sess->sess_cmd_lock);
 		se_cmd->se_tfo->release_cmd(se_cmd);
 		return;
 	}
 	if (se_sess->sess_tearing_down && se_cmd->cmd_wait_set) {
-		spin_unlock_irqrestore(&se_sess->sess_cmd_lock, flags);
+		spin_unlock(&se_sess->sess_cmd_lock);
 		complete(&se_cmd->cmd_wait_comp);
 		return;
 	}
 	list_del(&se_cmd->se_cmd_list);
-	spin_unlock_irqrestore(&se_sess->sess_cmd_lock, flags);
+	spin_unlock(&se_sess->sess_cmd_lock);
 
 	se_cmd->se_tfo->release_cmd(se_cmd);
 }
···
  */
 int target_put_sess_cmd(struct se_session *se_sess, struct se_cmd *se_cmd)
 {
-	return kref_put(&se_cmd->cmd_kref, target_release_cmd_kref);
+	return kref_put_spinlock_irqsave(&se_cmd->cmd_kref, target_release_cmd_kref,
+			&se_sess->sess_cmd_lock);
 }
 EXPORT_SYMBOL(target_put_sess_cmd);
 

drivers/thermal/armada_thermal.c

···
 		return -ENOMEM;
 
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (!res) {
-		dev_err(&pdev->dev, "Failed to get platform resource\n");
-		return -ENODEV;
-	}
-
 	priv->sensor = devm_ioremap_resource(&pdev->dev, res);
 	if (IS_ERR(priv->sensor))
 		return PTR_ERR(priv->sensor);
 
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
-	if (!res) {
-		dev_err(&pdev->dev, "Failed to get platform resource\n");
-		return -ENODEV;
-	}
-
 	priv->control = devm_ioremap_resource(&pdev->dev, res);
 	if (IS_ERR(priv->control))
 		return PTR_ERR(priv->control);

drivers/thermal/dove_thermal.c

···
 		return PTR_ERR(priv->sensor);
 
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
-	if (!res) {
-		dev_err(&pdev->dev, "Failed to get platform resource\n");
-		return -ENODEV;
-	}
 	priv->control = devm_ioremap_resource(&pdev->dev, res);
 	if (IS_ERR(priv->control))
 		return PTR_ERR(priv->control);

drivers/thermal/exynos_thermal.c

···
 	INIT_WORK(&data->irq_work, exynos_tmu_work);
 
 	data->mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (!data->mem) {
-		dev_err(&pdev->dev, "Failed to get platform resource\n");
-		return -ENOENT;
-	}
-
 	data->base = devm_ioremap_resource(&pdev->dev, data->mem);
 	if (IS_ERR(data->base))
 		return PTR_ERR(data->base);

drivers/usb/chipidea/core.c

···
 	}
 
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (!res) {
-		dev_err(dev, "missing resource\n");
-		return -ENODEV;
-	}
-
 	base = devm_ioremap_resource(dev, res);
 	if (IS_ERR(base))
 		return PTR_ERR(base);

drivers/usb/gadget/bcm63xx_udc.c

···
 	}
 
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (!res) {
-		dev_err(dev, "error finding USBD resource\n");
-		return -ENXIO;
-	}
-
 	udc->usbd_regs = devm_ioremap_resource(dev, res);
 	if (IS_ERR(udc->usbd_regs))
 		return PTR_ERR(udc->usbd_regs);
 
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
-	if (!res) {
-		dev_err(dev, "error finding IUDMA resource\n");
-		return -ENXIO;
-	}
-
 	udc->iudma_regs = devm_ioremap_resource(dev, res);
 	if (IS_ERR(udc->iudma_regs))
 		return PTR_ERR(udc->iudma_regs);

drivers/usb/host/ohci-nxp.c

···
 	}
 
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (!res) {
-		dev_err(&pdev->dev, "Failed to get MEM resource\n");
-		ret =  -ENOMEM;
-		goto out8;
-	}
-
 	hcd->regs = devm_ioremap_resource(&pdev->dev, res);
 	if (IS_ERR(hcd->regs)) {
 		ret = PTR_ERR(hcd->regs);

drivers/usb/phy/phy-mv-u3d-usb.c

···
 	}
 
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (!res) {
-		dev_err(dev, "missing mem resource\n");
-		return -ENODEV;
-	}
-
 	phy_base = devm_ioremap_resource(dev, res);
 	if (IS_ERR(phy_base))
 		return PTR_ERR(phy_base);

drivers/usb/phy/phy-mxs-usb.c

···
 	int ret;
 
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (!res) {
-		dev_err(&pdev->dev, "can't get device resources\n");
-		return -ENOENT;
-	}
-
 	base = devm_ioremap_resource(&pdev->dev, res);
 	if (IS_ERR(base))
 		return PTR_ERR(base);

drivers/usb/phy/phy-samsung-usb2.c

···
 	int ret;
 
 	phy_mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (!phy_mem) {
-		dev_err(dev, "%s: missing mem resource\n", __func__);
-		return -ENODEV;
-	}
-
 	phy_base = devm_ioremap_resource(dev, phy_mem);
 	if (IS_ERR(phy_base))
 		return PTR_ERR(phy_base);

drivers/usb/phy/phy-samsung-usb3.c

···
 	int ret;
 
 	phy_mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (!phy_mem) {
-		dev_err(dev, "%s: missing mem resource\n", __func__);
-		return -ENODEV;
-	}
-
 	phy_base = devm_ioremap_resource(dev, phy_mem);
 	if (IS_ERR(phy_base))
 		return PTR_ERR(phy_base);

drivers/vhost/vringh.c

···
  *
  * Since these may be in userspace, we use (inline) accessors.
  */
+#include <linux/module.h>
 #include <linux/vringh.h>
 #include <linux/virtio_ring.h>
 #include <linux/kernel.h>
···
 	return __vringh_need_notify(vrh, getu16_kern);
 }
 EXPORT_SYMBOL(vringh_need_notify_kern);
+
+MODULE_LICENSE("GPL");

drivers/video/omap2/dss/hdmi.c

···
 	mutex_init(&hdmi.ip_data.lock);
 
 	res = platform_get_resource(hdmi.pdev, IORESOURCE_MEM, 0);
-	if (!res) {
-		DSSERR("can't get IORESOURCE_MEM HDMI\n");
-		return -EINVAL;
-	}
 
 	/* Base address taken from platform */
 	hdmi.ip_data.base_wp = devm_ioremap_resource(&pdev->dev, res);

drivers/video/omap2/vrfb.c

···
 	/* first resource is the register res, the rest are vrfb contexts */
 
 	mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (!mem) {
-		dev_err(&pdev->dev, "can't get vrfb base address\n");
-		return -EINVAL;
-	}
-
 	vrfb_base = devm_ioremap_resource(&pdev->dev, mem);
 	if (IS_ERR(vrfb_base))
 		return PTR_ERR(vrfb_base);

drivers/w1/masters/omap_hdq.c

···
 	platform_set_drvdata(pdev, hdq_data);
 
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (!res) {
-		dev_dbg(&pdev->dev, "unable to get resource\n");
-		return -ENXIO;
-	}
-
 	hdq_data->hdq_base = devm_ioremap_resource(dev, res);
 	if (IS_ERR(hdq_data->hdq_base))
 		return PTR_ERR(hdq_data->hdq_base);

drivers/watchdog/ath79_wdt.c

···
 		return -EBUSY;
 
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (!res) {
-		dev_err(&pdev->dev, "no memory resource found\n");
-		return -EINVAL;
-	}
-
 	wdt_base = devm_ioremap_resource(&pdev->dev, res);
 	if (IS_ERR(wdt_base))
 		return PTR_ERR(wdt_base);

drivers/watchdog/davinci_wdt.c

···
 	dev_info(dev, "heartbeat %d sec\n", heartbeat);
 
 	wdt_mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (wdt_mem == NULL) {
-		dev_err(dev, "failed to get memory region resource\n");
-		return -ENOENT;
-	}
-
 	wdt_base = devm_ioremap_resource(dev, wdt_mem);
 	if (IS_ERR(wdt_base))
 		return PTR_ERR(wdt_base);

drivers/watchdog/imx2_wdt.c

···
 	struct resource *res;
 
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (!res) {
-		dev_err(&pdev->dev, "can't get device resources\n");
-		return -ENODEV;
-	}
-
 	imx2_wdt.base = devm_ioremap_resource(&pdev->dev, res);
 	if (IS_ERR(imx2_wdt.base))
 		return PTR_ERR(imx2_wdt.base);

drivers/xen/Kconfig

···
 	  by the current usage of anonymous memory ("committed AS") and
 	  controlled by various sysfs-settable parameters.  Configuring
 	  FRONTSWAP is highly recommended; if it is not configured, self-
-	  ballooning is disabled by default but can be enabled with the
-	  'selfballooning' kernel boot parameter.  If FRONTSWAP is configured,
+	  ballooning is disabled by default. If FRONTSWAP is configured,
 	  frontswap-selfshrinking is enabled by default but can be disabled
-	  with the 'noselfshrink' kernel boot parameter; and self-ballooning
-	  is enabled by default but can be disabled with the 'noselfballooning'
+	  with the 'tmem.selfshrink=0' kernel boot parameter; and self-ballooning
+	  is enabled by default but can be disabled with the 'tmem.selfballooning=0'
 	  kernel boot parameter.  Note that systems without a sufficiently
 	  large swap device should not enable self-ballooning.
 

drivers/xen/balloon.c

···
 		nr_pages = ARRAY_SIZE(frame_list);
 
 	for (i = 0; i < nr_pages; i++) {
-		if ((page = alloc_page(gfp)) == NULL) {
+		page = alloc_page(gfp);
+		if (page == NULL) {
 			nr_pages = i;
 			state = BP_EAGAIN;
 			break;

drivers/xen/privcmd.c

···
 	struct page **pages = vma->vm_private_data;
 	int numpgs = (vma->vm_end - vma->vm_start) >> PAGE_SHIFT;
 
-	if (!xen_feature(XENFEAT_auto_translated_physmap || !numpgs || !pages))
+	if (!xen_feature(XENFEAT_auto_translated_physmap) || !numpgs || !pages)
 		return;
 
 	xen_unmap_domain_mfn_range(vma, numpgs, pages);

drivers/xen/tmem.c

···
 #include <linux/init.h>
 #include <linux/pagemap.h>
 #include <linux/cleancache.h>
-
-/* temporary ifdef until include/linux/frontswap.h is upstream */
-#ifdef CONFIG_FRONTSWAP
 #include <linux/frontswap.h>
-#endif
 
 #include <xen/xen.h>
 #include <xen/interface/xen.h>
···
 #include <asm/xen/page.h>
 #include <asm/xen/hypervisor.h>
 #include <xen/tmem.h>
+
+#ifndef CONFIG_XEN_TMEM_MODULE
+bool __read_mostly tmem_enabled = false;
+
+static int __init enable_tmem(char *s)
+{
+	tmem_enabled = true;
+	return 1;
+}
+__setup("tmem", enable_tmem);
+#endif
+
+#ifdef CONFIG_CLEANCACHE
+static bool cleancache __read_mostly = true;
+module_param(cleancache, bool, S_IRUGO);
+static bool selfballooning __read_mostly = true;
+module_param(selfballooning, bool, S_IRUGO);
+#endif /* CONFIG_CLEANCACHE */
+
+#ifdef CONFIG_FRONTSWAP
+static bool frontswap __read_mostly = true;
+module_param(frontswap, bool, S_IRUGO);
+#endif /* CONFIG_FRONTSWAP */
+
+#ifdef CONFIG_XEN_SELFBALLOONING
+static bool selfshrinking __read_mostly = true;
+module_param(selfshrinking, bool, S_IRUGO);
+#endif /* CONFIG_XEN_SELFBALLOONING */
 
 #define TMEM_CONTROL               0
 #define TMEM_NEW_POOL              1
···
 	return xen_tmem_op(TMEM_FLUSH_OBJECT, pool_id, oid, 0, 0, 0, 0, 0);
 }
 
-#ifndef CONFIG_XEN_TMEM_MODULE
-bool __read_mostly tmem_enabled = false;
-
-static int __init enable_tmem(char *s)
-{
-	tmem_enabled = true;
-	return 1;
-}
-__setup("tmem", enable_tmem);
-#endif
 
 #ifdef CONFIG_CLEANCACHE
 static int xen_tmem_destroy_pool(u32 pool_id)
···
 	shared_uuid.uuid_hi = *(u64 *)(&uuid[8]);
 	return xen_tmem_new_pool(shared_uuid, TMEM_POOL_SHARED, pagesize);
 }
-
-static bool disable_cleancache __read_mostly;
-static bool disable_selfballooning __read_mostly;
-#ifdef CONFIG_XEN_TMEM_MODULE
-module_param(disable_cleancache, bool, S_IRUGO);
-module_param(disable_selfballooning, bool, S_IRUGO);
-#else
-static int __init no_cleancache(char *s)
-{
-	disable_cleancache = true;
-	return 1;
-}
-__setup("nocleancache", no_cleancache);
-#endif
 
 static struct cleancache_ops tmem_cleancache_ops = {
 	.put_page = tmem_cleancache_put_page,
···
 		    xen_tmem_new_pool(private, TMEM_POOL_PERSIST, PAGE_SIZE);
 }
 
-static bool disable_frontswap __read_mostly;
-static bool disable_frontswap_selfshrinking __read_mostly;
-#ifdef CONFIG_XEN_TMEM_MODULE
-module_param(disable_frontswap, bool, S_IRUGO);
-module_param(disable_frontswap_selfshrinking, bool, S_IRUGO);
-#else
-static int __init no_frontswap(char *s)
-{
-	disable_frontswap = true;
-	return 1;
-}
-__setup("nofrontswap", no_frontswap);
-#endif
-
 static struct frontswap_ops tmem_frontswap_ops = {
 	.store = tmem_frontswap_store,
 	.load = tmem_frontswap_load,
···
 	.invalidate_area = tmem_frontswap_flush_area,
 	.init = tmem_frontswap_init
 };
-#else	/* CONFIG_FRONTSWAP */
-#define disable_frontswap_selfshrinking 1
 #endif
 
 static int xen_tmem_init(void)
···
 	if (!xen_domain())
 		return 0;
 #ifdef CONFIG_FRONTSWAP
-	if (tmem_enabled && !disable_frontswap) {
+	if (tmem_enabled && frontswap) {
 		char *s = "";
 		struct frontswap_ops *old_ops =
 			frontswap_register_ops(&tmem_frontswap_ops);
···
 #endif
 #ifdef CONFIG_CLEANCACHE
 	BUG_ON(sizeof(struct cleancache_filekey) != sizeof(struct tmem_oid));
-	if (tmem_enabled && !disable_cleancache) {
+	if (tmem_enabled && cleancache) {
 		char *s = "";
 		struct cleancache_ops *old_ops =
 			cleancache_register_ops(&tmem_cleancache_ops);
···
 	}
 #endif
 #ifdef CONFIG_XEN_SELFBALLOONING
-	xen_selfballoon_init(!disable_selfballooning,
-				!disable_frontswap_selfshrinking);
+	/*
+	 * There is no point of driving pages to the swap system if they
+	 * aren't going anywhere in tmem universe.
+	 */
+	if (!frontswap) {
+		selfshrinking = false;
+		selfballooning = false;
+	}
+	xen_selfballoon_init(selfballooning, selfshrinking);
 #endif
 	return 0;
 }

drivers/xen/xen-selfballoon.c

···
  * System configuration note: Selfballooning should not be enabled on
  * systems without a sufficiently large swap device configured; for best
  * results, it is recommended that total swap be increased by the size
- * of the guest memory.  Also, while technically not required to be
- * configured, it is highly recommended that frontswap also be configured
- * and enabled when selfballooning is running.  So, selfballooning
- * is disabled by default if frontswap is not configured and can only
- * be enabled with the "selfballooning" kernel boot option; similarly
- * selfballooning is enabled by default if frontswap is configured and
- * can be disabled with the "noselfballooning" kernel boot option.  Finally,
- * when frontswap is configured, frontswap-selfshrinking can be disabled
- * with the "noselfshrink" kernel boot option.
+ * of the guest memory. Note, that selfballooning should be disabled by default
+ * if frontswap is not configured.  Similarly selfballooning should be enabled
+ * by default if frontswap is configured and can be disabled with the
+ * "tmem.selfballooning=0" kernel boot option.  Finally, when frontswap is
+ * configured, frontswap-selfshrinking can be disabled  with the
+ * "tmem.selfshrink=0" kernel boot option.
  *
  * Selfballooning is disallowed in domain0 and force-disabled.
  *
···
 /* Enable/disable with sysfs. */
 static bool frontswap_selfshrinking __read_mostly;
 
-/* Enable/disable with kernel boot option. */
-static bool use_frontswap_selfshrink = true;
-
 /*
  * The default values for the following parameters were deemed reasonable
  * by experimentation, may be workload-dependent, and can all be
···
 	frontswap_shrink(tgt_frontswap_pages);
 }
 
-static int __init xen_nofrontswap_selfshrink_setup(char *s)
-{
-	use_frontswap_selfshrink = false;
-	return 1;
-}
-
-__setup("noselfshrink", xen_nofrontswap_selfshrink_setup);
-
-/* Disable with kernel boot option. */
-static bool use_selfballooning = true;
-
-static int __init xen_noselfballooning_setup(char *s)
-{
-	use_selfballooning = false;
-	return 1;
-}
-
-__setup("noselfballooning", xen_noselfballooning_setup);
-#else /* !CONFIG_FRONTSWAP */
-/* Enable with kernel boot option. */
-static bool use_selfballooning;
-
-static int __init xen_selfballooning_setup(char *s)
-{
-	use_selfballooning = true;
-	return 1;
-}
-
-__setup("selfballooning", xen_selfballooning_setup);
 #endif /* CONFIG_FRONTSWAP */
 
 #define MB2PAGES(mb)	((mb) << (20 - PAGE_SHIFT))

drivers/xen/xenbus/xenbus_dev_backend.c

···
 	return err;
 }
 
-static long xenbus_backend_ioctl(struct file *file, unsigned int cmd, unsigned long data)
+static long xenbus_backend_ioctl(struct file *file, unsigned int cmd,
+				 unsigned long data)
 {
 	if (!capable(CAP_SYS_ADMIN))
 		return -EPERM;
 
 	switch (cmd) {
-		case IOCTL_XENBUS_BACKEND_EVTCHN:
-			if (xen_store_evtchn > 0)
-				return xen_store_evtchn;
-			return -ENODEV;
-
-		case IOCTL_XENBUS_BACKEND_SETUP:
-			return xenbus_alloc(data);
-
-		default:
-			return -ENOTTY;
+	case IOCTL_XENBUS_BACKEND_EVTCHN:
+		if (xen_store_evtchn > 0)
+			return xen_store_evtchn;
+		return -ENODEV;
+	case IOCTL_XENBUS_BACKEND_SETUP:
+		return xenbus_alloc(data);
+	default:
+		return -ENOTTY;
 	}
 }
 

fs/btrfs/backref.c

···
 							   ref->parent, bsz, 0);
 				if (!eb || !extent_buffer_uptodate(eb)) {
 					free_extent_buffer(eb);
-					return -EIO;
+					ret = -EIO;
+					goto out;
 				}
 				ret = find_extent_in_eb(eb, bytenr,
 							*extent_item_pos, &eie);

fs/btrfs/check-integrity.c

···
 		unsigned int j;
 		DECLARE_COMPLETION_ONSTACK(complete);
 
-		bio = bio_alloc(GFP_NOFS, num_pages - i);
+		bio = btrfs_io_bio_alloc(GFP_NOFS, num_pages - i);
 		if (!bio) {
 			printk(KERN_INFO
 			       "btrfsic: bio_alloc() for %u pages failed!\n",

fs/btrfs/ctree.c

···
 			BUG_ON(ret); /* -ENOMEM */
 		}
 		if (new_flags != 0) {
+			int level = btrfs_header_level(buf);
+
 			ret = btrfs_set_disk_extent_flags(trans, root,
 							  buf->start,
 							  buf->len,
-							  new_flags, 0);
+							  new_flags, level, 0);
 			if (ret)
 				return ret;
 		}

fs/btrfs/ctree.h

···
 /* holds checksums of all the data extents */
 #define BTRFS_CSUM_TREE_OBJECTID 7ULL
 
-/* for storing balance parameters in the root tree */
-#define BTRFS_BALANCE_OBJECTID -4ULL
-
 /* holds quota configuration and tracking */
 #define BTRFS_QUOTA_TREE_OBJECTID 8ULL
+
+/* for storing balance parameters in the root tree */
+#define BTRFS_BALANCE_OBJECTID -4ULL
 
 /* orhpan objectid for tracking unlinked/truncated files */
 #define BTRFS_ORPHAN_OBJECTID -5ULL
···
 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans,
 				struct btrfs_root *root,
 				u64 bytenr, u64 num_bytes, u64 flags,
-				int is_data);
+				int level, int is_data);
 int btrfs_free_extent(struct btrfs_trans_handle *trans,
 		      struct btrfs_root *root,
 		      u64 bytenr, u64 num_bytes, u64 parent, u64 root_objectid,

fs/btrfs/delayed-ref.h

···
 struct btrfs_delayed_extent_op {
 	struct btrfs_disk_key key;
 	u64 flags_to_set;
+	int level;
 	unsigned int update_key:1;
 	unsigned int update_flags:1;
 	unsigned int is_data:1;

fs/btrfs/dev-replace.c

···
 	struct btrfs_device *tgt_device = NULL;
 	struct btrfs_device *src_device = NULL;
 
+	if (btrfs_fs_incompat(fs_info, RAID56)) {
+		pr_warn("btrfs: dev_replace cannot yet handle RAID5/RAID6\n");
+		return -EINVAL;
+	}
+
 	switch (args->start.cont_reading_from_srcdev_mode) {
 	case BTRFS_IOCTL_DEV_REPLACE_CONT_READING_FROM_SRCDEV_MODE_ALWAYS:
 	case BTRFS_IOCTL_DEV_REPLACE_CONT_READING_FROM_SRCDEV_MODE_AVOID:

fs/btrfs/disk-io.c

···
 	{ .id = BTRFS_DEV_TREE_OBJECTID,	.name_stem = "dev"	},
 	{ .id = BTRFS_FS_TREE_OBJECTID,		.name_stem = "fs"	},
 	{ .id = BTRFS_CSUM_TREE_OBJECTID,	.name_stem = "csum"	},
-	{ .id = BTRFS_ORPHAN_OBJECTID,		.name_stem = "orphan"	},
+	{ .id = BTRFS_QUOTA_TREE_OBJECTID,	.name_stem = "quota"	},
 	{ .id = BTRFS_TREE_LOG_OBJECTID,	.name_stem = "log"	},
 	{ .id = BTRFS_TREE_RELOC_OBJECTID,	.name_stem = "treloc"	},
 	{ .id = BTRFS_DATA_RELOC_TREE_OBJECTID,	.name_stem = "dreloc"	},
···
 	}
 
 	root->commit_root = btrfs_root_node(root);
-	BUG_ON(!root->node); /* -ENOMEM */
 out:
 	if (location->objectid != BTRFS_TREE_LOG_OBJECTID) {
 		root->ref_cows = 1;
···
 {
 	free_extent_buffer(info->tree_root->node);
 	free_extent_buffer(info->tree_root->commit_root);
-	free_extent_buffer(info->dev_root->node);
-	free_extent_buffer(info->dev_root->commit_root);
-	free_extent_buffer(info->extent_root->node);
-	free_extent_buffer(info->extent_root->commit_root);
-	free_extent_buffer(info->csum_root->node);
-	free_extent_buffer(info->csum_root->commit_root);
+	info->tree_root->node = NULL;
+	info->tree_root->commit_root = NULL;
+
+	if (info->dev_root) {
+		free_extent_buffer(info->dev_root->node);
+		free_extent_buffer(info->dev_root->commit_root);
+		info->dev_root->node = NULL;
+		info->dev_root->commit_root = NULL;
+	}
+	if (info->extent_root) {
+		free_extent_buffer(info->extent_root->node);
+		free_extent_buffer(info->extent_root->commit_root);
+		info->extent_root->node = NULL;
+		info->extent_root->commit_root = NULL;
+	}
+	if (info->csum_root) {
+		free_extent_buffer(info->csum_root->node);
+		free_extent_buffer(info->csum_root->commit_root);
+		info->csum_root->node = NULL;
+		info->csum_root->commit_root = NULL;
+	}
 	if (info->quota_root) {
 		free_extent_buffer(info->quota_root->node);
 		free_extent_buffer(info->quota_root->commit_root);
-	}
-
-	info->tree_root->node = NULL;
-	info->tree_root->commit_root = NULL;
-	info->dev_root->node = NULL;
-	info->dev_root->commit_root = NULL;
-	info->extent_root->node = NULL;
-	info->extent_root->commit_root = NULL;
-	info->csum_root->node = NULL;
-	info->csum_root->commit_root = NULL;
-	if (info->quota_root) {
 		info->quota_root->node = NULL;
 		info->quota_root->commit_root = NULL;
 	}
-
 	if (chunk_root) {
 		free_extent_buffer(info->chunk_root->node);
 		free_extent_buffer(info->chunk_root->commit_root);
···
 	 * caller
 	 */
 	device->flush_bio = NULL;
-	bio = bio_alloc(GFP_NOFS, 0);
+	bio = btrfs_io_bio_alloc(GFP_NOFS, 0);
 	if (!bio)
 		return -ENOMEM;
 
···
 					 ordered_operations);
 
 		list_del_init(&btrfs_inode->ordered_operations);
+		spin_unlock(&root->fs_info->ordered_extent_lock);
 
 		btrfs_invalidate_inodes(btrfs_inode->root);
+
+		spin_lock(&root->fs_info->ordered_extent_lock);
 	}
 
 	spin_unlock(&root->fs_info->ordered_extent_lock);
···
 		list_del_init(&btrfs_inode->delalloc_inodes);
 		clear_bit(BTRFS_INODE_IN_DELALLOC_LIST,
 			  &btrfs_inode->runtime_flags);
+		spin_unlock(&root->fs_info->delalloc_lock);
 
 		btrfs_invalidate_inodes(btrfs_inode->root);
+
+		spin_lock(&root->fs_info->delalloc_lock);
 	}
 
 	spin_unlock(&root->fs_info->delalloc_lock);
···
 		while (start <= end) {
 			eb = btrfs_find_tree_block(root, start,
 						   root->leafsize);
-			start += eb->len;
+			start += root->leafsize;
 			if (!eb)
 				continue;
 			wait_on_extent_buffer_writeback(eb);

fs/btrfs/extent-tree.c

···
 	u32 item_size;
 	int ret;
 	int err = 0;
-	int metadata = (node->type == BTRFS_TREE_BLOCK_REF_KEY ||
-			node->type == BTRFS_SHARED_BLOCK_REF_KEY);
+	int metadata = !extent_op->is_data;
 
 	if (trans->aborted)
 		return 0;
···
 	key.objectid = node->bytenr;
 
 	if (metadata) {
-		struct btrfs_delayed_tree_ref *tree_ref;
-
-		tree_ref = btrfs_delayed_node_to_tree_ref(node);
 		key.type = BTRFS_METADATA_ITEM_KEY;
-		key.offset = tree_ref->level;
+		key.offset = extent_op->level;
 	} else {
 		key.type = BTRFS_EXTENT_ITEM_KEY;
 		key.offset = node->num_bytes;
···
 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans,
 				struct btrfs_root *root,
 				u64 bytenr, u64 num_bytes, u64 flags,
-				int is_data)
+				int level, int is_data)
 {
 	struct btrfs_delayed_extent_op *extent_op;
 	int ret;
···
 	extent_op->update_flags = 1;
 	extent_op->update_key = 0;
 	extent_op->is_data = is_data ? 1 : 0;
+	extent_op->level = level;
 
 	ret = btrfs_add_delayed_extent_op(root->fs_info, trans, bytenr,
 					  num_bytes, extent_op);
···
 	WARN_ON(ret);
 
 	if (i_size_read(inode) > 0) {
+		ret = btrfs_check_trunc_cache_free_space(root,
+					&root->fs_info->global_block_rsv);
+		if (ret)
+			goto out_put;
+
 		ret = btrfs_truncate_free_space_cache(root, trans, path,
 						      inode);
 		if (ret)
···
 	fs_info->csum_root->block_rsv = &fs_info->global_block_rsv;
 	fs_info->dev_root->block_rsv = &fs_info->global_block_rsv;
 	fs_info->tree_root->block_rsv = &fs_info->global_block_rsv;
+	if (fs_info->quota_root)
+		fs_info->quota_root->block_rsv = &fs_info->global_block_rsv;
 	fs_info->chunk_root->block_rsv = &fs_info->chunk_block_rsv;
 
 	update_global_block_rsv(fs_info);
···
 	struct btrfs_block_rsv *block_rsv;
 	struct btrfs_block_rsv *global_rsv = &root->fs_info->global_block_rsv;
 	int ret;
+	bool global_updated = false;
 
 	block_rsv = get_block_rsv(trans, root);
 
-	if (block_rsv->size == 0) {
-		ret = reserve_metadata_bytes(root, block_rsv, blocksize,
-					     BTRFS_RESERVE_NO_FLUSH);
-		/*
-		 * If we couldn't reserve metadata bytes try and use some from
-		 * the global reserve.
-		 */
-		if (ret && block_rsv != global_rsv) {
-			ret = block_rsv_use_bytes(global_rsv, blocksize);
-			if (!ret)
-				return global_rsv;
-			return ERR_PTR(ret);
-		} else if (ret) {
-			return ERR_PTR(ret);
-		}
-		return block_rsv;
-	}
-
+	if (unlikely(block_rsv->size == 0))
+		goto try_reserve;
+again:
 	ret = block_rsv_use_bytes(block_rsv, blocksize);
 	if (!ret)
 		return block_rsv;
-	if (ret && !block_rsv->failfast) {
-		if (btrfs_test_opt(root, ENOSPC_DEBUG)) {
-			static DEFINE_RATELIMIT_STATE(_rs,
-					DEFAULT_RATELIMIT_INTERVAL * 10,
-					/*DEFAULT_RATELIMIT_BURST*/ 1);
-			if (__ratelimit(&_rs))
-				WARN(1, KERN_DEBUG
-					"btrfs: block rsv returned %d\n", ret);
-		}
-		ret = reserve_metadata_bytes(root, block_rsv, blocksize,
-					     BTRFS_RESERVE_NO_FLUSH);
-		if (!ret) {
-			return block_rsv;
-		} else if (ret && block_rsv != global_rsv) {
-			ret = block_rsv_use_bytes(global_rsv, blocksize);
-			if (!ret)
-				return global_rsv;
-		}
+
+	if (block_rsv->failfast)
+		return ERR_PTR(ret);
+
+	if (block_rsv->type == BTRFS_BLOCK_RSV_GLOBAL && !global_updated) {
+		global_updated = true;
+		update_global_block_rsv(root->fs_info);
+		goto again;
 	}
 
-	return ERR_PTR(-ENOSPC);
+	if (btrfs_test_opt(root, ENOSPC_DEBUG)) {
+		static DEFINE_RATELIMIT_STATE(_rs,
+				DEFAULT_RATELIMIT_INTERVAL * 10,
+				/*DEFAULT_RATELIMIT_BURST*/ 1);
+		if (__ratelimit(&_rs))
+			WARN(1, KERN_DEBUG
+				"btrfs: block rsv returned %d\n", ret);
+	}
+try_reserve:
+	ret = reserve_metadata_bytes(root, block_rsv, blocksize,
+				     BTRFS_RESERVE_NO_FLUSH);
+	if (!ret)
+		return block_rsv;
+	/*
+	 * If we couldn't reserve metadata bytes try and use some from
+	 * the global reserve if its space type is the same as the global
+	 * reservation.
+	 */
+	if (block_rsv->type != BTRFS_BLOCK_RSV_GLOBAL &&
+	    block_rsv->space_info == global_rsv->space_info) {
+		ret = block_rsv_use_bytes(global_rsv, blocksize);
+		if (!ret)
+			return global_rsv;
+	}
+	return ERR_PTR(ret);
 }
 
 static void unuse_block_rsv(struct btrfs_fs_info *fs_info,
···
 			extent_op->update_key = 1;
 		extent_op->update_flags = 1;
 		extent_op->is_data = 0;
+		extent_op->level = level;
 
 		ret = btrfs_add_delayed_tree_ref(root->fs_info, trans,
 					ins.objectid,
···
 		ret = btrfs_dec_ref(trans, root, eb, 0, wc->for_reloc);
 		BUG_ON(ret); /* -ENOMEM */
 		ret = btrfs_set_disk_extent_flags(trans, root, eb->start,
-						  eb->len, flag, 0);
+						  eb->len, flag,
+						  btrfs_header_level(eb), 0);
 		BUG_ON(ret); /* -ENOMEM */
 		wc->flags[level] |= flag;
 	}

fs/btrfs/extent_io.c

···
 
 static struct kmem_cache *extent_state_cache;
 static struct kmem_cache *extent_buffer_cache;
+static struct bio_set *btrfs_bioset;
 
 #ifdef CONFIG_BTRFS_DEBUG
 static LIST_HEAD(buffers);
···
 			SLAB_RECLAIM_ACCOUNT | SLAB_MEM_SPREAD, NULL);
 	if (!extent_buffer_cache)
 		goto free_state_cache;
+
+	btrfs_bioset = bioset_create(BIO_POOL_SIZE,
+				     offsetof(struct btrfs_io_bio, bio));
+	if (!btrfs_bioset)
+		goto free_buffer_cache;
 	return 0;
+
+free_buffer_cache:
+	kmem_cache_destroy(extent_buffer_cache);
+	extent_buffer_cache = NULL;
 
 free_state_cache:
 	kmem_cache_destroy(extent_state_cache);
+	extent_state_cache = NULL;
 	return -ENOMEM;
 }
 
···
 		kmem_cache_destroy(extent_state_cache);
 	if (extent_buffer_cache)
 		kmem_cache_destroy(extent_buffer_cache);
+	if (btrfs_bioset)
+		bioset_free(btrfs_bioset);
 }
 
 void extent_io_tree_init(struct extent_io_tree *tree,
···
 }
 
 /*
- * helper function to unlock a page if all the extents in the tree
- * for that page are unlocked
- */
-static void check_page_locked(struct extent_io_tree *tree, struct page *page)
-{
-	u64 start = page_offset(page);
-	u64 end = start + PAGE_CACHE_SIZE - 1;
-	if (!test_range_bit(tree, start, end, EXTENT_LOCKED, 0, NULL))
-		unlock_page(page);
-}
-
-/*
- * helper function to end page writeback if all the extents
- * in the tree for that page are done with writeback
- */
-static void check_page_writeback(struct extent_io_tree *tree,
-				 struct page *page)
-{
-	end_page_writeback(page);
-}
-
-/*
  * When IO fails, either with EIO or csum verification fails, we
  * try other mirrors that might have a good copy of the data.  This
  * io_failure_record is used to record state as we go through all the
···
 	if (btrfs_is_parity_mirror(map_tree, logical, length, mirror_num))
 		return 0;
 
-	bio = bio_alloc(GFP_NOFS, 1);
+	bio = btrfs_io_bio_alloc(GFP_NOFS, 1);
 	if (!bio)
 		return -EIO;
 	bio->bi_private = &compl;
···
 		return -EIO;
 	}
 
-	bio = bio_alloc(GFP_NOFS, 1);
+	bio = btrfs_io_bio_alloc(GFP_NOFS, 1);
 	if (!bio) {
 		free_io_failure(inode, failrec, 0);
 		return -EIO;
···
 	struct extent_io_tree *tree;
 	u64 start;
 	u64 end;
-	int whole_page;
 
 	do {
 		struct page *page = bvec->bv_page;
 		tree = &BTRFS_I(page->mapping->host)->io_tree;
 
-		start = page_offset(page) + bvec->bv_offset;
-		end = start + bvec->bv_len - 1;
+		/* We always issue full-page reads, but if some block
+		 * in a page fails to read, blk_update_request() will
+		 * advance bv_offset and adjust bv_len to compensate.
+		 * Print a warning for nonzero offsets, and an error
+		 * if they don't add up to a full page.  */
+		if (bvec->bv_offset || bvec->bv_len != PAGE_CACHE_SIZE)
+			printk("%s page write in btrfs with offset %u and length %u\n",
+			       bvec->bv_offset + bvec->bv_len != PAGE_CACHE_SIZE
+			       ? KERN_ERR "partial" : KERN_INFO "incomplete",
+			       bvec->bv_offset, bvec->bv_len);
 
-		if (bvec->bv_offset == 0 && bvec->bv_len == PAGE_CACHE_SIZE)
-			whole_page = 1;
-		else
-			whole_page = 0;
+		start = page_offset(page);
+		end = start + bvec->bv_offset + bvec->bv_len - 1;
 
 		if (--bvec >= bio->bi_io_vec)
 			prefetchw(&bvec->bv_page->flags);
···
 		if (end_extent_writepage(page, err, start, end))
 			continue;
 
-		if (whole_page)
-			end_page_writeback(page);
-		else
-			check_page_writeback(tree, page);
+		end_page_writeback(page);
 	} while (bvec >= bio->bi_io_vec);
 
 	bio_put(bio);
···
 	struct extent_io_tree *tree;
 	u64 start;
 	u64 end;
-	int whole_page;
 	int mirror;
 	int ret;
 
···
 		struct page *page = bvec->bv_page;
 		struct extent_state *cached = NULL;
 		struct extent_state *state;
+		struct btrfs_io_bio *io_bio = btrfs_io_bio(bio);
 
 		pr_debug("end_bio_extent_readpage: bi_sector=%llu, err=%d, "
-			 "mirror=%ld\n", (u64)bio->bi_sector, err,
-			 (long int)bio->bi_bdev);
+			 "mirror=%lu\n", (u64)bio->bi_sector, err,
+			 io_bio->mirror_num);
 		tree = &BTRFS_I(page->mapping->host)->io_tree;
 
-		start = page_offset(page) + bvec->bv_offset;
-		end = start + bvec->bv_len - 1;
+		/* We always issue full-page reads, but if some block
+		 * in a page fails to read, blk_update_request() will
+		 * advance bv_offset and adjust bv_len to compensate.
+		 * Print a warning for nonzero offsets, and an error
+		 * if they don't add up to a full page.  */
+		if (bvec->bv_offset || bvec->bv_len != PAGE_CACHE_SIZE)
+			printk("%s page read in btrfs with offset %u and length %u\n",
+			       bvec->bv_offset + bvec->bv_len != PAGE_CACHE_SIZE
+			       ? KERN_ERR "partial" : KERN_INFO "incomplete",
+			       bvec->bv_offset, bvec->bv_len);
 
-		if (bvec->bv_offset == 0 && bvec->bv_len == PAGE_CACHE_SIZE)
-			whole_page = 1;
-		else
-			whole_page = 0;
+		start = page_offset(page);
+		end = start + bvec->bv_offset + bvec->bv_len - 1;
 
 		if (++bvec <= bvec_end)
 			prefetchw(&bvec->bv_page->flags);
···
 		}
 		spin_unlock(&tree->lock);
 
-		mirror = (int)(unsigned long)bio->bi_bdev;
+		mirror = io_bio->mirror_num;
 		if (uptodate && tree->ops && tree->ops->readpage_end_io_hook) {
 			ret = tree->ops->readpage_end_io_hook(page, start, end,
 							      state, mirror);
···
 		}
 		unlock_extent_cached(tree, start, end, &cached, GFP_ATOMIC);
 
-		if (whole_page) {
-			if (uptodate) {
-				SetPageUptodate(page);
-			} else {
-				ClearPageUptodate(page);
-				SetPageError(page);
-			}
-			unlock_page(page);
+		if (uptodate) {
+			SetPageUptodate(page);
 		} else {
-			if (uptodate) {
-				check_page_uptodate(tree, page);
-			} else {
-				ClearPageUptodate(page);
-				SetPageError(page);
-			}
-			check_page_locked(tree, page);
+			ClearPageUptodate(page);
+			SetPageError(page);
 		}
+		unlock_page(page);
 	} while (bvec <= bvec_end);
 
 	bio_put(bio);
 }
 
+/*
+ * this allocates from the btrfs_bioset.  We're returning a bio right now
+ * but you can call btrfs_io_bio for the appropriate container_of magic
+ */
 struct bio *
 btrfs_bio_alloc(struct block_device *bdev, u64 first_sector, int nr_vecs,
 		gfp_t gfp_flags)
 {
 	struct bio *bio;
 
-	bio = bio_alloc(gfp_flags, nr_vecs);
+	bio = bio_alloc_bioset(gfp_flags, nr_vecs, btrfs_bioset);
 
 	if (bio == NULL && (current->flags & PF_MEMALLOC)) {
-		while (!bio && (nr_vecs /= 2))
-			bio = bio_alloc(gfp_flags, nr_vecs);
+		while (!bio && (nr_vecs /= 2)) {
+			bio = bio_alloc_bioset(gfp_flags,
+					       nr_vecs, btrfs_bioset);
+		}
 	}
 
 	if (bio) {
···
 	}
 	return bio;
 }
+
+struct bio *btrfs_bio_clone(struct bio *bio, gfp_t gfp_mask)
+{
+	return bio_clone_bioset(bio, gfp_mask, btrfs_bioset);
+}
+
+
+/* this also allocates from the btrfs_bioset */
+struct bio *btrfs_io_bio_alloc(gfp_t gfp_mask, unsigned int nr_iovecs)
+{
+	return bio_alloc_bioset(gfp_mask, nr_iovecs, btrfs_bioset);
+}
+
 
 static int __must_check submit_one_bio(int rw, struct bio *bio,
 				       int mirror_num, unsigned long bio_flags)
···
 		last_for_get_extent = isize;
 	}
 
-	lock_extent_bits(&BTRFS_I(inode)->io_tree, start, start + len, 0,
+	lock_extent_bits(&BTRFS_I(inode)->io_tree, start, start + len - 1, 0,
 			 &cached_state);
 
 	em = get_extent_skip_holes(inode, start, last_for_get_extent,
···
 out_free:
 	free_extent_map(em);
 out:
-	unlock_extent_cached(&BTRFS_I(inode)->io_tree, start, start + len,
+	unlock_extent_cached(&BTRFS_I(inode)->io_tree, start, start + len - 1,
 			     &cached_state, GFP_NOFS);
 	return ret;
 }

fs/btrfs/extent_io.h

···
 struct bio *
 btrfs_bio_alloc(struct block_device *bdev, u64 first_sector, int nr_vecs,
 		gfp_t gfp_flags);
+struct bio *btrfs_io_bio_alloc(gfp_t gfp_mask, unsigned int nr_iovecs);
+struct bio *btrfs_bio_clone(struct bio *bio, gfp_t gfp_mask);
 
 struct btrfs_fs_info;
 

fs/btrfs/free-space-cache.c

···
 					 block_group->key.objectid);
 }
 
-int btrfs_truncate_free_space_cache(struct btrfs_root *root,
-				    struct btrfs_trans_handle *trans,
-				    struct btrfs_path *path,
-				    struct inode *inode)
+int btrfs_check_trunc_cache_free_space(struct btrfs_root *root,
+				       struct btrfs_block_rsv *rsv)
 {
-	struct btrfs_block_rsv *rsv;
 	u64 needed_bytes;
-	loff_t oldsize;
-	int ret = 0;
-
-	rsv = trans->block_rsv;
-	trans->block_rsv = &root->fs_info->global_block_rsv;
+	int ret;
 
 	/* 1 for slack space, 1 for updating the inode */
 	needed_bytes = btrfs_calc_trunc_metadata_size(root, 1) +
 		btrfs_calc_trans_metadata_size(root, 1);
 
-	spin_lock(&trans->block_rsv->lock);
-	if (trans->block_rsv->reserved < needed_bytes) {
-		spin_unlock(&trans->block_rsv->lock);
-		trans->block_rsv = rsv;
-		return -ENOSPC;
-	}
-	spin_unlock(&trans->block_rsv->lock);
+	spin_lock(&rsv->lock);
+	if (rsv->reserved < needed_bytes)
+		ret = -ENOSPC;
+	else
+		ret = 0;
+	spin_unlock(&rsv->lock);
+	return 0;
+}
+
+int btrfs_truncate_free_space_cache(struct btrfs_root *root,
+				    struct btrfs_trans_handle *trans,
+				    struct btrfs_path *path,
+				    struct inode *inode)
+{
+	loff_t oldsize;
+	int ret = 0;
 
 	oldsize = i_size_read(inode);
 	btrfs_i_size_write(inode, 0);
···
 	 */
 	ret = btrfs_truncate_inode_items(trans, root, inode,
 					 0, BTRFS_EXTENT_DATA_KEY);
-
 	if (ret) {
-		trans->block_rsv = rsv;
 		btrfs_abort_transaction(trans, root, ret);
 		return ret;
 	}
···
 	ret = btrfs_update_inode(trans, root, inode);
 	if (ret)
 		btrfs_abort_transaction(trans, root, ret);
-	trans->block_rsv = rsv;
 
 	return ret;
 }
···
 
 	/* Make sure we can fit our crcs into the first page */
 	if (io_ctl.check_crcs &&
-	    (io_ctl.num_pages * sizeof(u32)) >= PAGE_CACHE_SIZE) {
-		WARN_ON(1);
+	    (io_ctl.num_pages * sizeof(u32)) >= PAGE_CACHE_SIZE)
 		goto out_nospc;
-	}
 
 	io_ctl_set_generation(&io_ctl, trans->transid);
 

fs/btrfs/free-space-cache.h

···
 			    struct btrfs_block_group_cache *block_group,
 			    struct btrfs_path *path);
 
+int btrfs_check_trunc_cache_free_space(struct btrfs_root *root,
+				       struct btrfs_block_rsv *rsv);
 int btrfs_truncate_free_space_cache(struct btrfs_root *root,
 				    struct btrfs_trans_handle *trans,
 				    struct btrfs_path *path,

fs/btrfs/inode-map.c

···
 	num_bytes = trans->bytes_reserved;
 	/*
 	 * 1 item for inode item insertion if need
-	 * 3 items for inode item update (in the worst case)
+	 * 4 items for inode item update (in the worst case)
+	 * 1 items for slack space if we need do truncation
 	 * 1 item for free space object
 	 * 3 items for pre-allocation
 	 */
-	trans->bytes_reserved = btrfs_calc_trans_metadata_size(root, 8);
+	trans->bytes_reserved = btrfs_calc_trans_metadata_size(root, 10);
 	ret = btrfs_block_rsv_add(root, trans->block_rsv,
 				  trans->bytes_reserved,
 				  BTRFS_RESERVE_NO_FLUSH);
···
 	if (i_size_read(inode) > 0) {
 		ret = btrfs_truncate_free_space_cache(root, trans, path, inode);
 		if (ret) {
-			btrfs_abort_transaction(trans, root, ret);
+			if (ret != -ENOSPC)
+				btrfs_abort_transaction(trans, root, ret);
 			goto out_put;
 		}
 	}

fs/btrfs/inode.c

···
 					async_extent->ram_size - 1, 0);
 
 		em = alloc_extent_map();
-		if (!em)
+		if (!em) {
+			ret = -ENOMEM;
 			goto out_free_reserve;
+		}
 		em->start = async_extent->start;
 		em->len = async_extent->ram_size;
 		em->orig_start = em->start;
···
 		}
 
 		em = alloc_extent_map();
-		if (!em)
+		if (!em) {
+			ret = -ENOMEM;
 			goto out_reserve;
+		}
 		em->start = start;
 		em->orig_start = em->start;
 		ram_size = ins.offset;
···
 	btrfs_end_transaction(trans, root);
 	btrfs_btree_balance_dirty(root);
 no_delete:
+	btrfs_remove_delayed_node(inode);
 	clear_inode(inode);
 	return;
 }
···
 	struct rb_node **p;
 	struct rb_node *parent;
 	u64 ino = btrfs_ino(inode);
-again:
-	p = &root->inode_tree.rb_node;
-	parent = NULL;
 
 	if (inode_unhashed(inode))
 		return;
-
+again:
+	parent = NULL;
 	spin_lock(&root->inode_lock);
+	p = &root->inode_tree.rb_node;
 	while (*p) {
 		parent = *p;
 		entry = rb_entry(parent, struct btrfs_inode, rb_node);
···
 	/* IO errors */
 	int errors;
 
+	/* orig_bio is our btrfs_io_bio */
 	struct bio *orig_bio;
+
+	/* dio_bio came from fs/direct-io.c */
+	struct bio *dio_bio;
 };
 
 static void btrfs_endio_direct_read(struct bio *bio, int err)
···
 	struct bio_vec *bvec = bio->bi_io_vec;
 	struct inode *inode = dip->inode;
 	struct btrfs_root *root = BTRFS_I(inode)->root;
+	struct bio *dio_bio;
 	u64 start;
 
 	start = dip->logical_offset;
···
 
 	unlock_extent(&BTRFS_I(inode)->io_tree, dip->logical_offset,
 		      dip->logical_offset + dip->bytes - 1);
-	bio->bi_private = dip->private;
+	dio_bio = dip->dio_bio;
 
 	kfree(dip);
 
 	/* If we had a csum failure make sure to clear the uptodate flag */
 	if (err)
-		clear_bit(BIO_UPTODATE, &bio->bi_flags);
-	dio_end_io(bio, err);
+		clear_bit(BIO_UPTODATE, &dio_bio->bi_flags);
+	dio_end_io(dio_bio, err);
+	bio_put(bio);
 }
 
 static void btrfs_endio_direct_write(struct bio *bio, int err)
···
 	struct btrfs_ordered_extent *ordered = NULL;
 	u64 ordered_offset = dip->logical_offset;
 	u64 ordered_bytes = dip->bytes;
+	struct bio *dio_bio;
 	int ret;
 
 	if (err)
···
 		goto again;
 	}
 out_done:
-	bio->bi_private = dip->private;
+	dio_bio = dip->dio_bio;
 
 	kfree(dip);
 
 	/* If we had an error make sure to clear the uptodate flag */
 	if (err)
-		clear_bit(BIO_UPTODATE, &bio->bi_flags);
-	dio_end_io(bio, err);
+		clear_bit(BIO_UPTODATE, &dio_bio->bi_flags);
+	dio_end_io(dio_bio, err);
+	bio_put(bio);
 }
 
 static int __btrfs_submit_bio_start_direct_io(struct inode *inode, int rw,
···
 	if (!atomic_dec_and_test(&dip->pending_bios))
 		goto out;
 
-	if (dip->errors)
+	if (dip->errors) {
 		bio_io_error(dip->orig_bio);
-	else {
-		set_bit(BIO_UPTODATE, &dip->orig_bio->bi_flags);
+	} else {
+		set_bit(BIO_UPTODATE, &dip->dio_bio->bi_flags);
 		bio_endio(dip->orig_bio, 0);
 	}
 out:
···
 	return 0;
 }
 
-static void btrfs_submit_direct(int rw, struct bio *bio, struct inode *inode,
-				loff_t file_offset)
+static void btrfs_submit_direct(int rw, struct bio *dio_bio,
+				struct inode *inode, loff_t file_offset)
 {
 	struct btrfs_root *root = BTRFS_I(inode)->root;
 	struct btrfs_dio_private *dip;
-	struct bio_vec *bvec = bio->bi_io_vec;
+	struct bio_vec *bvec = dio_bio->bi_io_vec;
+	struct bio *io_bio;
 	int skip_sum;
 	int write = rw & REQ_WRITE;
 	int ret = 0;
 
 	skip_sum = BTRFS_I(inode)->flags & BTRFS_INODE_NODATASUM;
 
-	dip = kmalloc(sizeof(*dip), GFP_NOFS);
-	if (!dip) {
+	io_bio = btrfs_bio_clone(dio_bio, GFP_NOFS);
+
+	if (!io_bio) {
 		ret = -ENOMEM;
 		goto free_ordered;
 	}
 
-	dip->private = bio->bi_private;
+	dip = kmalloc(sizeof(*dip), GFP_NOFS);
+	if (!dip) {
+		ret = -ENOMEM;
+		goto free_io_bio;
+	}
+
+	dip->private = dio_bio->bi_private;
+	io_bio->bi_private = dio_bio->bi_private;
 	dip->inode = inode;
 	dip->logical_offset = file_offset;
 
···
 	do {
 		dip->bytes += bvec->bv_len;
 		bvec++;
-	} while (bvec <= (bio->bi_io_vec + bio->bi_vcnt - 1));
+	} while (bvec <= (dio_bio->bi_io_vec + dio_bio->bi_vcnt - 1));
 
-	dip->disk_bytenr = (u64)bio->bi_sector << 9;
-	bio->bi_private = dip;
+	dip->disk_bytenr = (u64)dio_bio->bi_sector << 9;
+	io_bio->bi_private = dip;
 	dip->errors = 0;
-	dip->orig_bio = bio;
+	dip->orig_bio = io_bio;
+	dip->dio_bio = dio_bio;
 	atomic_set(&dip->pending_bios, 0);
 
 	if (write)
-		bio->bi_end_io = btrfs_endio_direct_write;
+		io_bio->bi_end_io = btrfs_endio_direct_write;
 	else
-		bio->bi_end_io = btrfs_endio_direct_read;
+		io_bio->bi_end_io = btrfs_endio_direct_read;
 
 	ret = btrfs_submit_direct_hook(rw, dip, skip_sum);
 	if (!ret)
 		return;
+
+free_io_bio:
+	bio_put(io_bio);
+
 free_ordered:
 	/*
 	 * If this is a write, we need to clean up the reserved space and kill
···
 		btrfs_put_ordered_extent(ordered);
 		btrfs_put_ordered_extent(ordered);
 	}
-	bio_endio(bio, ret);
+	bio_endio(dio_bio, ret);
 }
 
 static ssize_t check_direct_IO(struct btrfs_root *root, int rw, struct kiocb *iocb,
···
 	inode_tree_del(inode);
 	btrfs_drop_extent_cache(inode, 0, (u64)-1, 0);
 free:
-	btrfs_remove_delayed_node(inode);
 	call_rcu(&inode->i_rcu, btrfs_i_callback);
 }
 

fs/btrfs/ioctl.c

···
 		item_off = btrfs_item_ptr_offset(leaf, i);
 		item_len = btrfs_item_size_nr(leaf, i);
 
-		if (item_len > BTRFS_SEARCH_ARGS_BUFSIZE)
+		btrfs_item_key_to_cpu(leaf, key, i);
+		if (!key_in_sk(key, sk))
+			continue;
+
+		if (sizeof(sh) + item_len > BTRFS_SEARCH_ARGS_BUFSIZE)
 			item_len = 0;
 
 		if (sizeof(sh) + item_len + *sk_offset >
···
 			ret = 1;
 			goto overflow;
 		}
-
-		btrfs_item_key_to_cpu(leaf, key, i);
-		if (!key_in_sk(key, sk))
-			continue;
 
 		sh.objectid = key->objectid;
 		sh.offset = key->offset;

fs/btrfs/raid56.c

···
 	}
 
 	/* put a new bio on the list */
-	bio = bio_alloc(GFP_NOFS, bio_max_len >> PAGE_SHIFT?:1);
+	bio = btrfs_io_bio_alloc(GFP_NOFS, bio_max_len >> PAGE_SHIFT?:1);
 	if (!bio)
 		return -ENOMEM;
 

fs/btrfs/relocation.c

···
 			if (!eb || !extent_buffer_uptodate(eb)) {
 				ret = (!eb) ? -ENOMEM : -EIO;
 				free_extent_buffer(eb);
-				return ret;
+				break;
 			}
 			btrfs_tree_lock(eb);
 			if (cow) {
···
 	}
 
 truncate:
+	ret = btrfs_check_trunc_cache_free_space(root,
+						 &fs_info->global_block_rsv);
+	if (ret)
+		goto out;
+
 	path = btrfs_alloc_path();
 	if (!path) {
 		ret = -ENOMEM;

fs/btrfs/scrub.c

···
 		}
 
 		WARN_ON(!page->page);
-		bio = bio_alloc(GFP_NOFS, 1);
+		bio = btrfs_io_bio_alloc(GFP_NOFS, 1);
 		if (!bio) {
 			page->io_error = 1;
 			sblock->no_io_error_seen = 0;
···
 			return -EIO;
 		}
 
-		bio = bio_alloc(GFP_NOFS, 1);
+		bio = btrfs_io_bio_alloc(GFP_NOFS, 1);
 		if (!bio)
 			return -EIO;
 		bio->bi_bdev = page_bad->dev->bdev;
···
 		sbio->dev = wr_ctx->tgtdev;
 		bio = sbio->bio;
 		if (!bio) {
-			bio = bio_alloc(GFP_NOFS, wr_ctx->pages_per_wr_bio);
+			bio = btrfs_io_bio_alloc(GFP_NOFS, wr_ctx->pages_per_wr_bio);
 			if (!bio) {
 				mutex_unlock(&wr_ctx->wr_lock);
 				return -ENOMEM;
···
 		sbio->dev = spage->dev;
 		bio = sbio->bio;
 		if (!bio) {
-			bio = bio_alloc(GFP_NOFS, sctx->pages_per_rd_bio);
+			bio = btrfs_io_bio_alloc(GFP_NOFS, sctx->pages_per_rd_bio);
 			if (!bio)
 				return -ENOMEM;
 			sbio->bio = bio;
···
 			"btrfs: scrub write_page_nocow(bdev == NULL) is unexpected!\n");
 		return -EIO;
 	}
-	bio = bio_alloc(GFP_NOFS, 1);
+	bio = btrfs_io_bio_alloc(GFP_NOFS, 1);
 	if (!bio) {
 		spin_lock(&sctx->stat_lock);
 		sctx->stat.malloc_errors++;

fs/btrfs/super.c

···
 
 		btrfs_dev_replace_suspend_for_unmount(fs_info);
 		btrfs_scrub_cancel(fs_info);
+		btrfs_pause_balance(fs_info);
 
 		ret = btrfs_commit_super(root);
 		if (ret)

fs/btrfs/volumes.c

···
 	allowed = BTRFS_AVAIL_ALLOC_BIT_SINGLE;
 	if (num_devices == 1)
 		allowed |= BTRFS_BLOCK_GROUP_DUP;
-	else if (num_devices < 4)
+	else if (num_devices > 1)
 		allowed |= (BTRFS_BLOCK_GROUP_RAID0 | BTRFS_BLOCK_GROUP_RAID1);
-	else
-		allowed |= (BTRFS_BLOCK_GROUP_RAID0 | BTRFS_BLOCK_GROUP_RAID1 |
-				BTRFS_BLOCK_GROUP_RAID10 |
-				BTRFS_BLOCK_GROUP_RAID5 |
-				BTRFS_BLOCK_GROUP_RAID6);
-
+	if (num_devices > 2)
+		allowed |= BTRFS_BLOCK_GROUP_RAID5;
+	if (num_devices > 3)
+		allowed |= (BTRFS_BLOCK_GROUP_RAID10 |
+			    BTRFS_BLOCK_GROUP_RAID6);
 	if ((bctl->data.flags & BTRFS_BALANCE_ARGS_CONVERT) &&
 	    (!alloc_profile_is_valid(bctl->data.target, 1) ||
 	     (bctl->data.target & ~allowed))) {
···
 	return 0;
 }
 
-static void *merge_stripe_index_into_bio_private(void *bi_private,
-						 unsigned int stripe_index)
-{
-	/*
-	 * with single, dup, RAID0, RAID1 and RAID10, stripe_index is
-	 * at most 1.
-	 * The alternative solution (instead of stealing bits from the
-	 * pointer) would be to allocate an intermediate structure
-	 * that contains the old private pointer plus the stripe_index.
-	 */
-	BUG_ON((((uintptr_t)bi_private) & 3) != 0);
-	BUG_ON(stripe_index > 3);
-	return (void *)(((uintptr_t)bi_private) | stripe_index);
-}
-
-static struct btrfs_bio *extract_bbio_from_bio_private(void *bi_private)
-{
-	return (struct btrfs_bio *)(((uintptr_t)bi_private) & ~((uintptr_t)3));
-}
-
-static unsigned int extract_stripe_index_from_bio_private(void *bi_private)
-{
-	return (unsigned int)((uintptr_t)bi_private) & 3;
-}
-
 static void btrfs_end_bio(struct bio *bio, int err)
 {
-	struct btrfs_bio *bbio = extract_bbio_from_bio_private(bio->bi_private);
+	struct btrfs_bio *bbio = bio->bi_private;
 	int is_orig_bio = 0;
 
 	if (err) {
 		atomic_inc(&bbio->error);
 		if (err == -EIO || err == -EREMOTEIO) {
 			unsigned int stripe_index =
-				extract_stripe_index_from_bio_private(
-					bio->bi_private);
+				btrfs_io_bio(bio)->stripe_index;
 			struct btrfs_device *dev;
 
 			BUG_ON(stripe_index >= bbio->num_stripes);
···
 		}
 		bio->bi_private = bbio->private;
 		bio->bi_end_io = bbio->end_io;
-		bio->bi_bdev = (struct block_device *)
-					(unsigned long)bbio->mirror_num;
+		btrfs_io_bio(bio)->mirror_num = bbio->mirror_num;
 		/* only send an error to the higher layers if it is
 		 * beyond the tolerance of the btrfs bio
 		 */
···
 	struct btrfs_device *dev = bbio->stripes[dev_nr].dev;
 
 	bio->bi_private = bbio;
-	bio->bi_private = merge_stripe_index_into_bio_private(
-			bio->bi_private, (unsigned int)dev_nr);
+	btrfs_io_bio(bio)->stripe_index = dev_nr;
 	bio->bi_end_io = btrfs_end_bio;
 	bio->bi_sector = physical >> 9;
 #ifdef DEBUG
···
 	if (atomic_dec_and_test(&bbio->stripes_pending)) {
 		bio->bi_private = bbio->private;
 		bio->bi_end_io = bbio->end_io;
-		bio->bi_bdev = (struct block_device *)
-			(unsigned long)bbio->mirror_num;
+		btrfs_io_bio(bio)->mirror_num = bbio->mirror_num;
 		bio->bi_sector = logical >> 9;
 		kfree(bbio);
 		bio_endio(bio, -EIO);
···
 		}
 
 		if (dev_nr < total_devs - 1) {
-			bio = bio_clone(first_bio, GFP_NOFS);
+			bio = btrfs_bio_clone(first_bio, GFP_NOFS);
 			BUG_ON(!bio); /* -ENOMEM */
 		} else {
 			bio = first_bio;

fs/btrfs/volumes.h

···
 	int rotating;
 };
 
+/*
+ * we need the mirror number and stripe index to be passed around
+ * the call chain while we are processing end_io (especially errors).
+ * Really, what we need is a btrfs_bio structure that has this info
+ * and is properly sized with its stripe array, but we're not there
+ * quite yet.  We have our own btrfs bioset, and all of the bios
+ * we allocate are actually btrfs_io_bios.  We'll cram as much of
+ * struct btrfs_bio as we can into this over time.
+ */
+struct btrfs_io_bio {
+	unsigned long mirror_num;
+	unsigned long stripe_index;
+	struct bio bio;
+};
+
+static inline struct btrfs_io_bio *btrfs_io_bio(struct bio *bio)
+{
+	return container_of(bio, struct btrfs_io_bio, bio);
+}
+
 struct btrfs_bio_stripe {
 	struct btrfs_device *dev;
 	u64 physical;

fs/ext4/ext4.h

···
 	ssize_t			size;		/* size of the extent */
 	struct kiocb		*iocb;		/* iocb struct for AIO */
 	int			result;		/* error value for AIO */
-	atomic_t		count;		/* reference counter */
 } ext4_io_end_t;
 
 struct ext4_io_submit {
···
 
 /* page-io.c */
 extern int __init ext4_init_pageio(void);
+extern void ext4_add_complete_io(ext4_io_end_t *io_end);
 extern void ext4_exit_pageio(void);
 extern void ext4_ioend_shutdown(struct inode *);
+extern void ext4_free_io_end(ext4_io_end_t *io);
 extern ext4_io_end_t *ext4_init_io_end(struct inode *inode, gfp_t flags);
-extern ext4_io_end_t *ext4_get_io_end(ext4_io_end_t *io_end);
-extern int ext4_put_io_end(ext4_io_end_t *io_end);
-extern void ext4_put_io_end_defer(ext4_io_end_t *io_end);
-extern void ext4_io_submit_init(struct ext4_io_submit *io,
-				struct writeback_control *wbc);
 extern void ext4_end_io_work(struct work_struct *work);
 extern void ext4_io_submit(struct ext4_io_submit *io);
 extern int ext4_bio_write_page(struct ext4_io_submit *io,

fs/ext4/extents.c

···
 {
 	struct extent_status es;
 
-	ext4_es_find_delayed_extent(inode, lblk_start, &es);
+	ext4_es_find_delayed_extent_range(inode, lblk_start, lblk_end, &es);
 	if (es.es_len == 0)
 		return 0; /* there is no delay extent in this tree */
 	else if (es.es_lblk <= lblk_start &&
···
 	struct extent_status es;
 	ext4_lblk_t block, next_del;
 
-	ext4_es_find_delayed_extent(inode, newes->es_lblk, &es);
-
 	if (newes->es_pblk == 0) {
+		ext4_es_find_delayed_extent_range(inode, newes->es_lblk,
+				newes->es_lblk + newes->es_len - 1, &es);
+
 		/*
 		 * No extent in extent-tree contains block @newes->es_pblk,
 		 * then the block may stay in 1)a hole or 2)delayed-extent.
···
 	}
 
 	block = newes->es_lblk + newes->es_len;
-	ext4_es_find_delayed_extent(inode, block, &es);
+	ext4_es_find_delayed_extent_range(inode, block, EXT_MAX_BLOCKS, &es);
 	if (es.es_len == 0)
 		next_del = EXT_MAX_BLOCKS;
 	else

fs/ext4/extents_status.c

···
 }
 
 /*
- * ext4_es_find_delayed_extent: find the 1st delayed extent covering @es->lblk
- * if it exists, otherwise, the next extent after @es->lblk.
+ * ext4_es_find_delayed_extent_range: find the 1st delayed extent covering
+ * @es->lblk if it exists, otherwise, the next extent after @es->lblk.
  *
  * @inode: the inode which owns delayed extents
  * @lblk: the offset where we start to search
+ * @end: the offset where we stop to search
  * @es: delayed extent that we found
  */
-void ext4_es_find_delayed_extent(struct inode *inode, ext4_lblk_t lblk,
+void ext4_es_find_delayed_extent_range(struct inode *inode,
+				 ext4_lblk_t lblk, ext4_lblk_t end,
 				 struct extent_status *es)
 {
 	struct ext4_es_tree *tree = NULL;
···
 	struct rb_node *node;
 
 	BUG_ON(es == NULL);
-	trace_ext4_es_find_delayed_extent_enter(inode, lblk);
+	BUG_ON(end < lblk);
+	trace_ext4_es_find_delayed_extent_range_enter(inode, lblk);
 
 	read_lock(&EXT4_I(inode)->i_es_lock);
 	tree = &EXT4_I(inode)->i_es_tree;
···
 	if (es1 && !ext4_es_is_delayed(es1)) {
 		while ((node = rb_next(&es1->rb_node)) != NULL) {
 			es1 = rb_entry(node, struct extent_status, rb_node);
+			if (es1->es_lblk > end) {
+				es1 = NULL;
+				break;
+			}
 			if (ext4_es_is_delayed(es1))
 				break;
 		}
···
 	read_unlock(&EXT4_I(inode)->i_es_lock);
 
 	ext4_es_lru_add(inode);
-	trace_ext4_es_find_delayed_extent_exit(inode, es);
+	trace_ext4_es_find_delayed_extent_range_exit(inode, es);
 }
 
 static struct extent_status *

fs/ext4/extents_status.h

···
 				 unsigned long long status);
 extern int ext4_es_remove_extent(struct inode *inode, ext4_lblk_t lblk,
 				 ext4_lblk_t len);
-extern void ext4_es_find_delayed_extent(struct inode *inode, ext4_lblk_t lblk,
+extern void ext4_es_find_delayed_extent_range(struct inode *inode,
+					ext4_lblk_t lblk, ext4_lblk_t end,
 					struct extent_status *es);
 extern int ext4_es_lookup_extent(struct inode *inode, ext4_lblk_t lblk,
 				 struct extent_status *es);

fs/ext4/file.c

···
 		 * If there is a delay extent at this offset,
 		 * it will be as a data.
 		 */
-		ext4_es_find_delayed_extent(inode, last, &es);
+		ext4_es_find_delayed_extent_range(inode, last, last, &es);
 		if (es.es_len != 0 && in_range(last, es.es_lblk, es.es_len)) {
 			if (last != start)
 				dataoff = last << blkbits;
···
 		 * If there is a delay extent at this offset,
 		 * we will skip this extent.
 		 */
-		ext4_es_find_delayed_extent(inode, last, &es);
+		ext4_es_find_delayed_extent_range(inode, last, last, &es);
 		if (es.es_len != 0 && in_range(last, es.es_lblk, es.es_len)) {
 			last = es.es_lblk + es.es_len;
 			holeoff = last << blkbits;

fs/ext4/inode.c

···
 	struct ext4_io_submit io_submit;
 
 	BUG_ON(mpd->next_page <= mpd->first_page);
-	ext4_io_submit_init(&io_submit, mpd->wbc);
-	io_submit.io_end = ext4_init_io_end(inode, GFP_NOFS);
-	if (!io_submit.io_end)
-		return -ENOMEM;
+	memset(&io_submit, 0, sizeof(io_submit));
 	/*
 	 * We need to start from the first_page to the next_page - 1
 	 * to make sure we also write the mapped dirty buffer_heads.
···
 		pagevec_release(&pvec);
 	}
 	ext4_io_submit(&io_submit);
-	/* Drop io_end reference we got from init */
-	ext4_put_io_end_defer(io_submit.io_end);
 	return ret;
 }
 
···
 		 */
 		return __ext4_journalled_writepage(page, len);
 
-	ext4_io_submit_init(&io_submit, wbc);
-	io_submit.io_end = ext4_init_io_end(inode, GFP_NOFS);
-	if (!io_submit.io_end) {
-		redirty_page_for_writepage(wbc, page);
-		return -ENOMEM;
-	}
+	memset(&io_submit, 0, sizeof(io_submit));
 	ret = ext4_bio_write_page(&io_submit, page, len, wbc);
 	ext4_io_submit(&io_submit);
-	/* Drop io_end reference we got from init */
-	ext4_put_io_end_defer(io_submit.io_end);
 	return ret;
 }
 
···
 	struct inode *inode = file_inode(iocb->ki_filp);
         ext4_io_end_t *io_end = iocb->private;
 
-	/* if not async direct IO just return */
-	if (!io_end) {
-		inode_dio_done(inode);
-		if (is_async)
-			aio_complete(iocb, ret, 0);
-		return;
-	}
+	/* if not async direct IO or dio with 0 bytes write, just return */
+	if (!io_end || !size)
+		goto out;
 
 	ext_debug("ext4_end_io_dio(): io_end 0x%p "
 		  "for inode %lu, iocb 0x%p, offset %llu, size %zd\n",
···
 		  size);
 
 	iocb->private = NULL;
+
+	/* if not aio dio with unwritten extents, just free io and return */
+	if (!(io_end->flag & EXT4_IO_END_UNWRITTEN)) {
+		ext4_free_io_end(io_end);
+out:
+		inode_dio_done(inode);
+		if (is_async)
+			aio_complete(iocb, ret, 0);
+		return;
+	}
+
 	io_end->offset = offset;
 	io_end->size = size;
 	if (is_async) {
 		io_end->iocb = iocb;
 		io_end->result = ret;
 	}
-	ext4_put_io_end_defer(io_end);
+
+	ext4_add_complete_io(io_end);
 }
 
 /*
···
 	get_block_t *get_block_func = NULL;
 	int dio_flags = 0;
 	loff_t final_size = offset + count;
-	ext4_io_end_t *io_end = NULL;
 
 	/* Use the old path for reads and writes beyond i_size. */
 	if (rw != WRITE || final_size > inode->i_size)
···
 	iocb->private = NULL;
 	ext4_inode_aio_set(inode, NULL);
 	if (!is_sync_kiocb(iocb)) {
-		io_end = ext4_init_io_end(inode, GFP_NOFS);
+		ext4_io_end_t *io_end = ext4_init_io_end(inode, GFP_NOFS);
 		if (!io_end) {
 			ret = -ENOMEM;
 			goto retake_lock;
 		}
 		io_end->flag |= EXT4_IO_END_DIRECT;
-		/*
-		 * Grab reference for DIO. Will be dropped in ext4_end_io_dio()
-		 */
-		iocb->private = ext4_get_io_end(io_end);
+		iocb->private = io_end;
 		/*
 		 * we save the io structure for current async direct
 		 * IO, so that later ext4_map_blocks() could flag the
···
 				   NULL,
 				   dio_flags);
 
-	/*
-	 * Put our reference to io_end. This can free the io_end structure e.g.
-	 * in sync IO case or in case of error. It can even perform extent
-	 * conversion if all bios we submitted finished before we got here.
-	 * Note that in that case iocb->private can be already set to NULL
-	 * here.
-	 */
-	if (io_end) {
+	if (iocb->private)
 		ext4_inode_aio_set(inode, NULL);
-		ext4_put_io_end(io_end);
-		/*
-		 * In case of error or no write ext4_end_io_dio() was not
-		 * called so we have to put iocb's reference.
-		 */
-		if (ret <= 0 && ret != -EIOCBQUEUED) {
-			WARN_ON(iocb->private != io_end);
-			ext4_put_io_end(io_end);
-			iocb->private = NULL;
-		}
-	}
-	if (ret > 0 && !overwrite && ext4_test_inode_state(inode,
+	/*
+	 * The io_end structure takes a reference to the inode, that
+	 * structure needs to be destroyed and the reference to the
+	 * inode need to be dropped, when IO is complete, even with 0
+	 * byte write, or failed.
+	 *
+	 * In the successful AIO DIO case, the io_end structure will
+	 * be destroyed and the reference to the inode will be dropped
+	 * after the end_io call back function is called.
+	 *
+	 * In the case there is 0 byte write, or error case, since VFS
+	 * direct IO won't invoke the end_io call back function, we
+	 * need to free the end_io structure here.
+	 */
+	if (ret != -EIOCBQUEUED && ret <= 0 && iocb->private) {
+		ext4_free_io_end(iocb->private);
+		iocb->private = NULL;
+	} else if (ret > 0 && !overwrite && ext4_test_inode_state(inode,
 						EXT4_STATE_DIO_UNWRITTEN)) {
 		int err;
 		/*

fs/ext4/mballoc.c

···
 		group = ac->ac_g_ex.fe_group;
 
 		for (i = 0; i < ngroups; group++, i++) {
-			if (group == ngroups)
+			/*
+			 * Artificially restricted ngroups for non-extent
+			 * files makes group > ngroups possible on first loop.
+			 */
+			if (group >= ngroups)
 				group = 0;
 
 			/* This now checks without needing the buddy page */

fs/ext4/page-io.c

···
 		cancel_work_sync(&EXT4_I(inode)->i_unwritten_work);
 }
 
-static void ext4_release_io_end(ext4_io_end_t *io_end)
+void ext4_free_io_end(ext4_io_end_t *io)
 {
-	BUG_ON(!list_empty(&io_end->list));
-	BUG_ON(io_end->flag & EXT4_IO_END_UNWRITTEN);
+	BUG_ON(!io);
+	BUG_ON(!list_empty(&io->list));
+	BUG_ON(io->flag & EXT4_IO_END_UNWRITTEN);
 
-	if (atomic_dec_and_test(&EXT4_I(io_end->inode)->i_ioend_count))
-		wake_up_all(ext4_ioend_wq(io_end->inode));
-	if (io_end->flag & EXT4_IO_END_DIRECT)
-		inode_dio_done(io_end->inode);
-	if (io_end->iocb)
-		aio_complete(io_end->iocb, io_end->result, 0);
-	kmem_cache_free(io_end_cachep, io_end);
-}
-
-static void ext4_clear_io_unwritten_flag(ext4_io_end_t *io_end)
-{
-	struct inode *inode = io_end->inode;
-
-	io_end->flag &= ~EXT4_IO_END_UNWRITTEN;
-	/* Wake up anyone waiting on unwritten extent conversion */
-	if (atomic_dec_and_test(&EXT4_I(inode)->i_unwritten))
-		wake_up_all(ext4_ioend_wq(inode));
+	if (atomic_dec_and_test(&EXT4_I(io->inode)->i_ioend_count))
+		wake_up_all(ext4_ioend_wq(io->inode));
+	kmem_cache_free(io_end_cachep, io);
 }
 
 /* check a range of space and convert unwritten extents to written. */
···
 			 "(inode %lu, offset %llu, size %zd, error %d)",
 			 inode->i_ino, offset, size, ret);
 	}
-	ext4_clear_io_unwritten_flag(io);
-	ext4_release_io_end(io);
+	/* Wake up anyone waiting on unwritten extent conversion */
+	if (atomic_dec_and_test(&EXT4_I(inode)->i_unwritten))
+		wake_up_all(ext4_ioend_wq(inode));
+	if (io->flag & EXT4_IO_END_DIRECT)
+		inode_dio_done(inode);
+	if (io->iocb)
+		aio_complete(io->iocb, io->result, 0);
 	return ret;
 }
 
···
 }
 
 /* Add the io_end to per-inode completed end_io list. */
-static void ext4_add_complete_io(ext4_io_end_t *io_end)
+void ext4_add_complete_io(ext4_io_end_t *io_end)
 {
 	struct ext4_inode_info *ei = EXT4_I(io_end->inode);
 	struct workqueue_struct *wq;
···
 		err = ext4_end_io(io);
 		if (unlikely(!ret && err))
 			ret = err;
+		io->flag &= ~EXT4_IO_END_UNWRITTEN;
+		ext4_free_io_end(io);
 	}
 	return ret;
 }
···
 		atomic_inc(&EXT4_I(inode)->i_ioend_count);
 		io->inode = inode;
 		INIT_LIST_HEAD(&io->list);
-		atomic_set(&io->count, 1);
 	}
 	return io;
-}
-
-void ext4_put_io_end_defer(ext4_io_end_t *io_end)
-{
-	if (atomic_dec_and_test(&io_end->count)) {
-		if (!(io_end->flag & EXT4_IO_END_UNWRITTEN) || !io_end->size) {
-			ext4_release_io_end(io_end);
-			return;
-		}
-		ext4_add_complete_io(io_end);
-	}
-}
-
-int ext4_put_io_end(ext4_io_end_t *io_end)
-{
-	int err = 0;
-
-	if (atomic_dec_and_test(&io_end->count)) {
-		if (io_end->flag & EXT4_IO_END_UNWRITTEN) {
-			err = ext4_convert_unwritten_extents(io_end->inode,
-						io_end->offset, io_end->size);
-			ext4_clear_io_unwritten_flag(io_end);
-		}
-		ext4_release_io_end(io_end);
-	}
-	return err;
-}
-
-ext4_io_end_t *ext4_get_io_end(ext4_io_end_t *io_end)
-{
-	atomic_inc(&io_end->count);
-	return io_end;
 }
 
 /*
···
 			     bi_sector >> (inode->i_blkbits - 9));
 	}
 
-	ext4_put_io_end_defer(io_end);
+	if (!(io_end->flag & EXT4_IO_END_UNWRITTEN)) {
+		ext4_free_io_end(io_end);
+		return;
+	}
+
+	ext4_add_complete_io(io_end);
 }
 
 void ext4_io_submit(struct ext4_io_submit *io)
···
 		bio_put(io->io_bio);
 	}
 	io->io_bio = NULL;
-}
-
-void ext4_io_submit_init(struct ext4_io_submit *io,
-			 struct writeback_control *wbc)
-{
-	io->io_op = (wbc->sync_mode == WB_SYNC_ALL ?  WRITE_SYNC : WRITE);
-	io->io_bio = NULL;
+	io->io_op = 0;
 	io->io_end = NULL;
 }
 
-static int io_submit_init_bio(struct ext4_io_submit *io,
-			      struct buffer_head *bh)
+static int io_submit_init(struct ext4_io_submit *io,
+			  struct inode *inode,
+			  struct writeback_control *wbc,
+			  struct buffer_head *bh)
 {
+	ext4_io_end_t *io_end;
+	struct page *page = bh->b_page;
 	int nvecs = bio_get_nr_vecs(bh->b_bdev);
 	struct bio *bio;
 
+	io_end = ext4_init_io_end(inode, GFP_NOFS);
+	if (!io_end)
+		return -ENOMEM;
 	bio = bio_alloc(GFP_NOIO, min(nvecs, BIO_MAX_PAGES));
 	bio->bi_sector = bh->b_blocknr * (bh->b_size >> 9);
 	bio->bi_bdev = bh->b_bdev;
+	bio->bi_private = io->io_end = io_end;
 	bio->bi_end_io = ext4_end_bio;
-	bio->bi_private = ext4_get_io_end(io->io_end);
-	if (!io->io_end->size)
-		io->io_end->offset = (bh->b_page->index << PAGE_CACHE_SHIFT)
-				     + bh_offset(bh);
+
+	io_end->offset = (page->index << PAGE_CACHE_SHIFT) + bh_offset(bh);
+
 	io->io_bio = bio;
+	io->io_op = (wbc->sync_mode == WB_SYNC_ALL ?  WRITE_SYNC : WRITE);
 	io->io_next_block = bh->b_blocknr;
 	return 0;
 }
 
 static int io_submit_add_bh(struct ext4_io_submit *io,
 			    struct inode *inode,
+			    struct writeback_control *wbc,
 			    struct buffer_head *bh)
 {
 	ext4_io_end_t *io_end;
···
 		ext4_io_submit(io);
 	}
 	if (io->io_bio == NULL) {
-		ret = io_submit_init_bio(io, bh);
+		ret = io_submit_init(io, inode, wbc, bh);
 		if (ret)
 			return ret;
 	}
-	ret = bio_add_page(io->io_bio, bh->b_page, bh->b_size, bh_offset(bh));
-	if (ret != bh->b_size)
-		goto submit_and_retry;
 	io_end = io->io_end;
 	if (test_clear_buffer_uninit(bh))
 		ext4_set_io_unwritten_flag(inode, io_end);
-	io_end->size += bh->b_size;
+	io->io_end->size += bh->b_size;
 	io->io_next_block++;
+	ret = bio_add_page(io->io_bio, bh->b_page, bh->b_size, bh_offset(bh));
+	if (ret != bh->b_size)
+		goto submit_and_retry;
 	return 0;
 }
 
···
 	do {
 		if (!buffer_async_write(bh))
 			continue;
-		ret = io_submit_add_bh(io, inode, bh);
+		ret = io_submit_add_bh(io, inode, wbc, bh);
 		if (ret) {
 			/*
 			 * We only get here on ENOMEM.  Not much else

include/acpi/acpiosxf.h

···
 /*
  * OSL Initialization and shutdown primitives
  */
-acpi_status __initdata acpi_os_initialize(void);
+acpi_status __init acpi_os_initialize(void);
 
 acpi_status acpi_os_terminate(void);
 

include/acpi/processor.h

···
 int acpi_processor_power_exit(struct acpi_processor *pr);
 int acpi_processor_cst_has_changed(struct acpi_processor *pr);
 int acpi_processor_hotplug(struct acpi_processor *pr);
-int acpi_processor_suspend(struct device *dev);
-int acpi_processor_resume(struct device *dev);
 extern struct cpuidle_driver acpi_idle_driver;
+
+#ifdef CONFIG_PM_SLEEP
+void acpi_processor_syscore_init(void);
+void acpi_processor_syscore_exit(void);
+#else
+static inline void acpi_processor_syscore_init(void) {}
+static inline void acpi_processor_syscore_exit(void) {}
+#endif
 
 /* in processor_thermal.c */
 int acpi_processor_get_limit_info(struct acpi_processor *pr);

include/drm/drmP.h

···
 	int flags;
 	drm_ioctl_t *func;
 	unsigned int cmd_drv;
+	const char *name;
 };
 
 /**
···
  */
 
 #define DRM_IOCTL_DEF_DRV(ioctl, _func, _flags)			\
-	[DRM_IOCTL_NR(DRM_##ioctl)] = {.cmd = DRM_##ioctl, .func = _func, .flags = _flags, .cmd_drv = DRM_IOCTL_##ioctl}
+	[DRM_IOCTL_NR(DRM_##ioctl)] = {.cmd = DRM_##ioctl, .func = _func, .flags = _flags, .cmd_drv = DRM_IOCTL_##ioctl, .name = #ioctl}
 
 struct drm_magic_entry {
 	struct list_head head;

include/drm/drm_fb_helper.h

···
 
 /**
  * struct drm_fb_helper_funcs - driver callbacks for the fbdev emulation library
- * @gamma_set: - Set the given gamma lut register on the given crtc.
- * @gamma_get: - Read the given gamma lut register on the given crtc, used to
- * 		 save the current lut when force-restoring the fbdev for e.g.
- * 		 kdbg.
- * @fb_probe: - Driver callback to allocate and initialize the fbdev info
- * 		structure. Futhermore it also needs to allocate the drm
- * 		framebuffer used to back the fbdev.
+ * @gamma_set: Set the given gamma lut register on the given crtc.
+ * @gamma_get: Read the given gamma lut register on the given crtc, used to
+ *             save the current lut when force-restoring the fbdev for e.g.
+ *             kdbg.
+ * @fb_probe: Driver callback to allocate and initialize the fbdev info
+ *            structure. Futhermore it also needs to allocate the drm
+ *            framebuffer used to back the fbdev.
+ * @initial_config: Setup an initial fbdev display configuration
  *
  * Driver callbacks used by the fbdev emulation helper library.
  */

include/drm/drm_os_linux.h

···
 /** Other copying of data from kernel space */
 #define DRM_COPY_TO_USER(arg1, arg2, arg3)		\
 	copy_to_user(arg1, arg2, arg3)
-/* Macros for copyfrom user, but checking readability only once */
-#define DRM_VERIFYAREA_READ( uaddr, size )		\
-	(access_ok( VERIFY_READ, uaddr, size ) ? 0 : -EFAULT)
-#define DRM_COPY_FROM_USER_UNCHECKED(arg1, arg2, arg3)	\
-	__copy_from_user(arg1, arg2, arg3)
-#define DRM_COPY_TO_USER_UNCHECKED(arg1, arg2, arg3)	\
-	__copy_to_user(arg1, arg2, arg3)
-#define DRM_GET_USER_UNCHECKED(val, uaddr)		\
-	__get_user(val, uaddr)
 
 #define DRM_HZ HZ
 

include/linux/journal-head.h

···
 
 	/*
 	 * Journalling list for this buffer [jbd_lock_bh_state()]
+	 * NOTE: We *cannot* combine this with b_modified into a bitfield
+	 * as gcc would then (which the C standard allows but which is
+	 * very unuseful) make 64-bit accesses to the bitfield and clobber
+	 * b_jcount if its update races with bitfield modification.
 	 */
-	unsigned b_jlist:4;
+	unsigned b_jlist;
 
 	/*
 	 * This flag signals the buffer has been modified by
 	 * the currently running transaction
 	 * [jbd_lock_bh_state()]
 	 */
-	unsigned b_modified:1;
+	unsigned b_modified;
 
 	/*
 	 * Copy of the buffer data frozen for writing to the log.

include/linux/kref.h

···
 #include <linux/atomic.h>
 #include <linux/kernel.h>
 #include <linux/mutex.h>
+#include <linux/spinlock.h>
 
 struct kref {
 	atomic_t refcount;
···
 static inline int kref_put(struct kref *kref, void (*release)(struct kref *kref))
 {
 	return kref_sub(kref, 1, release);
+}
+
+/**
+ * kref_put_spinlock_irqsave - decrement refcount for object.
+ * @kref: object.
+ * @release: pointer to the function that will clean up the object when the
+ *	     last reference to the object is released.
+ *	     This pointer is required, and it is not acceptable to pass kfree
+ *	     in as this function.
+ * @lock: lock to take in release case
+ *
+ * Behaves identical to kref_put with one exception.  If the reference count
+ * drops to zero, the lock will be taken atomically wrt dropping the reference
+ * count.  The release function has to call spin_unlock() without _irqrestore.
+ */
+static inline int kref_put_spinlock_irqsave(struct kref *kref,
+		void (*release)(struct kref *kref),
+		spinlock_t *lock)
+{
+	unsigned long flags;
+
+	WARN_ON(release == NULL);
+	if (atomic_add_unless(&kref->refcount, -1, 1))
+		return 0;
+	spin_lock_irqsave(lock, flags);
+	if (atomic_dec_and_test(&kref->refcount)) {
+		release(kref);
+		local_irq_restore(flags);
+		return 1;
+	}
+	spin_unlock_irqrestore(lock, flags);
+	return 0;
 }
 
 static inline int kref_put_mutex(struct kref *kref,

include/linux/mlx4/qp.h

···
 
 struct mlx4_qp_path {
 	u8			fl;
-	u8			reserved1[1];
+	u8			vlan_control;
 	u8			disable_pkey_check;
 	u8			pkey_index;
 	u8			counter_index;
···
 	u8			sched_queue;
 	u8			vlan_index;
 	u8			feup;
-	u8			reserved3;
+	u8			fvl_rx;
 	u8			reserved4[2];
 	u8			dmac[6];
+};
+
+enum { /* fl */
+	MLX4_FL_CV      = 1 << 6,
+	MLX4_FL_ETH_HIDE_CQE_VLAN       = 1 << 2
+};
+enum { /* vlan_control */
+	MLX4_VLAN_CTRL_ETH_TX_BLOCK_TAGGED	= 1 << 6,
+	MLX4_VLAN_CTRL_ETH_RX_BLOCK_TAGGED	= 1 << 2,
+	MLX4_VLAN_CTRL_ETH_RX_BLOCK_PRIO_TAGGED	= 1 << 1, /* 802.1p priority tag */
+	MLX4_VLAN_CTRL_ETH_RX_BLOCK_UNTAGGED	= 1 << 0
+};
+
+enum { /* feup */
+	MLX4_FEUP_FORCE_ETH_UP          = 1 << 6, /* force Eth UP */
+	MLX4_FSM_FORCE_ETH_SRC_MAC      = 1 << 5, /* force Source MAC */
+	MLX4_FVL_FORCE_ETH_VLAN         = 1 << 3  /* force Eth vlan */
+};
+
+enum { /* fvl_rx */
+	MLX4_FVL_RX_FORCE_ETH_VLAN      = 1 << 0 /* enforce Eth rx vlan */
 };
 
 struct mlx4_qp_context {
···
 	u8			mtt_base_addr_h;
 	__be32			mtt_base_addr_l;
 	u32			reserved5[10];
+};
+
+enum { /* param3 */
+	MLX4_STRIP_VLAN = 1 << 30
 };
 
 /* Which firmware version adds support for NEC (NoErrorCompletion) bit */

include/linux/of_platform.h

···
  *
  */
 
-#ifdef CONFIG_OF_DEVICE
 #include <linux/device.h>
 #include <linux/mod_devicetable.h>
+
+#ifdef CONFIG_OF_DEVICE
 #include <linux/pm.h>
 #include <linux/of_device.h>
 #include <linux/platform_device.h>
···
 
 #if !defined(CONFIG_OF_ADDRESS)
 struct of_dev_auxdata;
-struct device;
+struct device_node;
 static inline int of_platform_populate(struct device_node *root,
 					const struct of_device_id *matches,
 					const struct of_dev_auxdata *lookup,

include/linux/pinctrl/pinconf-generic.h

···
  *	if it is 0, pull-down is disabled.
  * @PIN_CONFIG_DRIVE_PUSH_PULL: the pin will be driven actively high and
  *	low, this is the most typical case and is typically achieved with two
- *	active transistors on the output. Sending this config will enabale
+ *	active transistors on the output. Setting this config will enable
  *	push-pull mode, the argument is ignored.
  * @PIN_CONFIG_DRIVE_OPEN_DRAIN: the pin will be driven with open drain (open
  *	collector) which means it is usually wired with other output ports
- *	which are then pulled up with an external resistor. Sending this
- *	config will enabale open drain mode, the argument is ignored.
+ *	which are then pulled up with an external resistor. Setting this
+ *	config will enable open drain mode, the argument is ignored.
  * @PIN_CONFIG_DRIVE_OPEN_SOURCE: the pin will be driven with open source
- *	(open emitter). Sending this config will enabale open drain mode, the
+ *	(open emitter). Setting this config will enable open drain mode, the
  *	argument is ignored.
- * @PIN_CONFIG_DRIVE_STRENGTH: the pin will output the current passed as
- * 	argument. The argument is in mA.
+ * @PIN_CONFIG_DRIVE_STRENGTH: the pin will sink or source at most the current
+ *	passed as argument. The argument is in mA.
  * @PIN_CONFIG_INPUT_SCHMITT_ENABLE: control schmitt-trigger mode on the pin.
  *      If the argument != 0, schmitt-trigger mode is enabled. If it's 0,
  *      schmitt-trigger mode is disabled.

include/linux/spi/spi.h

···
  * @modalias: Name of the driver to use with this device, or an alias
  *	for that name.  This appears in the sysfs "modalias" attribute
  *	for driver coldplugging, and in uevents used for hotplugging
- * @cs_gpio: gpio number of the chipselect line (optional, -EINVAL when
+ * @cs_gpio: gpio number of the chipselect line (optional, -ENOENT when
  *	when not using a GPIO line)
  *
  * A @spi_device is used to interchange data between an SPI slave
···
  *	queue so the subsystem notifies the driver that it may relax the
  *	hardware by issuing this call
  * @cs_gpios: Array of GPIOs to use as chip select lines; one per CS
- *	number. Any individual value may be -EINVAL for CS lines that
+ *	number. Any individual value may be -ENOENT for CS lines that
  *	are not GPIOs (driven by the SPI controller itself).
  *
  * Each SPI master controller can communicate with one or more @spi_device

include/linux/time.h

···
 
 extern bool persistent_clock_exist;
 
-#ifdef ALWAYS_USE_PERSISTENT_CLOCK
-#define has_persistent_clock()	true
-#else
 static inline bool has_persistent_clock(void)
 {
 	return persistent_clock_exist;
 }
-#endif
 
 extern void read_persistent_clock(struct timespec *ts);
 extern void read_boot_clock(struct timespec *ts);

include/net/sock.h

···
 struct raw_hashinfo;
 struct module;
 
+/*
+ * caches using SLAB_DESTROY_BY_RCU should let .next pointer from nulls nodes
+ * un-modified. Special care is taken when initializing object to zero.
+ */
+static inline void sk_prot_clear_nulls(struct sock *sk, int size)
+{
+	if (offsetof(struct sock, sk_node.next) != 0)
+		memset(sk, 0, offsetof(struct sock, sk_node.next));
+	memset(&sk->sk_node.pprev, 0,
+	       size - offsetof(struct sock, sk_node.pprev));
+}
+
 /* Networking protocol blocks we attach to sockets.
  * socket layer -> transport layer interface
  * transport -> network interface is defined by struct inet_proto

include/target/target_core_base.h

···
 #define CMD_T_ABORTED		(1 << 0)
 #define CMD_T_ACTIVE		(1 << 1)
 #define CMD_T_COMPLETE		(1 << 2)
-#define CMD_T_QUEUED		(1 << 3)
 #define CMD_T_SENT		(1 << 4)
 #define CMD_T_STOP		(1 << 5)
 #define CMD_T_FAILED		(1 << 6)
···
 	bool			def_pr_registered;
 	/* See transport_lunflags_table */
 	u32			lun_flags;
-	u32			deve_cmds;
 	u32			mapped_lun;
-	u32			average_bytes;
-	u32			last_byte_count;
 	u32			total_cmds;
-	u32			total_bytes;
 	u64			pr_res_key;
 	u64			creation_time;
 	u32			attach_count;

include/trace/events/ext4.h

···
 		  __entry->lblk, __entry->len)
 );
 
-TRACE_EVENT(ext4_es_find_delayed_extent_enter,
+TRACE_EVENT(ext4_es_find_delayed_extent_range_enter,
 	TP_PROTO(struct inode *inode, ext4_lblk_t lblk),
 
 	TP_ARGS(inode, lblk),
···
 		  (unsigned long) __entry->ino, __entry->lblk)
 );
 
-TRACE_EVENT(ext4_es_find_delayed_extent_exit,
+TRACE_EVENT(ext4_es_find_delayed_extent_range_exit,
 	TP_PROTO(struct inode *inode, struct extent_status *es),
 
 	TP_ARGS(inode, es),

kernel/cpu/idle.c

···
 
 static inline int cpu_idle_poll(void)
 {
+	rcu_idle_enter();
 	trace_cpu_idle_rcuidle(0, smp_processor_id());
 	local_irq_enable();
 	while (!need_resched())
 		cpu_relax();
 	trace_cpu_idle_rcuidle(PWR_EVENT_EXIT, smp_processor_id());
+	rcu_idle_exit();
 	return 1;
 }
 

kernel/events/core.c

···
 	perf_output_end(&handle);
 }
 
+typedef int  (perf_event_aux_match_cb)(struct perf_event *event, void *data);
+typedef void (perf_event_aux_output_cb)(struct perf_event *event, void *data);
+
+static void
+perf_event_aux_ctx(struct perf_event_context *ctx,
+		   perf_event_aux_match_cb match,
+		   perf_event_aux_output_cb output,
+		   void *data)
+{
+	struct perf_event *event;
+
+	list_for_each_entry_rcu(event, &ctx->event_list, event_entry) {
+		if (event->state < PERF_EVENT_STATE_INACTIVE)
+			continue;
+		if (!event_filter_match(event))
+			continue;
+		if (match(event, data))
+			output(event, data);
+	}
+}
+
+static void
+perf_event_aux(perf_event_aux_match_cb match,
+	       perf_event_aux_output_cb output,
+	       void *data,
+	       struct perf_event_context *task_ctx)
+{
+	struct perf_cpu_context *cpuctx;
+	struct perf_event_context *ctx;
+	struct pmu *pmu;
+	int ctxn;
+
+	rcu_read_lock();
+	list_for_each_entry_rcu(pmu, &pmus, entry) {
+		cpuctx = get_cpu_ptr(pmu->pmu_cpu_context);
+		if (cpuctx->unique_pmu != pmu)
+			goto next;
+		perf_event_aux_ctx(&cpuctx->ctx, match, output, data);
+		if (task_ctx)
+			goto next;
+		ctxn = pmu->task_ctx_nr;
+		if (ctxn < 0)
+			goto next;
+		ctx = rcu_dereference(current->perf_event_ctxp[ctxn]);
+		if (ctx)
+			perf_event_aux_ctx(ctx, match, output, data);
+next:
+		put_cpu_ptr(pmu->pmu_cpu_context);
+	}
+
+	if (task_ctx) {
+		preempt_disable();
+		perf_event_aux_ctx(task_ctx, match, output, data);
+		preempt_enable();
+	}
+	rcu_read_unlock();
+}
+
 /*
  * task tracking -- fork/exit
  *
···
 };
 
 static void perf_event_task_output(struct perf_event *event,
-				     struct perf_task_event *task_event)
+				   void *data)
 {
+	struct perf_task_event *task_event = data;
 	struct perf_output_handle handle;
 	struct perf_sample_data	sample;
 	struct task_struct *task = task_event->task;
···
 	task_event->event_id.header.size = size;
 }
 
-static int perf_event_task_match(struct perf_event *event)
+static int perf_event_task_match(struct perf_event *event,
+				 void *data __maybe_unused)
 {
-	if (event->state < PERF_EVENT_STATE_INACTIVE)
-		return 0;
-
-	if (!event_filter_match(event))
-		return 0;
-
-	if (event->attr.comm || event->attr.mmap ||
-	    event->attr.mmap_data || event->attr.task)
-		return 1;
-
-	return 0;
-}
-
-static void perf_event_task_ctx(struct perf_event_context *ctx,
-				  struct perf_task_event *task_event)
-{
-	struct perf_event *event;
-
-	list_for_each_entry_rcu(event, &ctx->event_list, event_entry) {
-		if (perf_event_task_match(event))
-			perf_event_task_output(event, task_event);
-	}
-}
-
-static void perf_event_task_event(struct perf_task_event *task_event)
-{
-	struct perf_cpu_context *cpuctx;
-	struct perf_event_context *ctx;
-	struct pmu *pmu;
-	int ctxn;
-
-	rcu_read_lock();
-	list_for_each_entry_rcu(pmu, &pmus, entry) {
-		cpuctx = get_cpu_ptr(pmu->pmu_cpu_context);
-		if (cpuctx->unique_pmu != pmu)
-			goto next;
-		perf_event_task_ctx(&cpuctx->ctx, task_event);
-
-		ctx = task_event->task_ctx;
-		if (!ctx) {
-			ctxn = pmu->task_ctx_nr;
-			if (ctxn < 0)
-				goto next;
-			ctx = rcu_dereference(current->perf_event_ctxp[ctxn]);
-			if (ctx)
-				perf_event_task_ctx(ctx, task_event);
-		}
-next:
-		put_cpu_ptr(pmu->pmu_cpu_context);
-	}
-	if (task_event->task_ctx)
-		perf_event_task_ctx(task_event->task_ctx, task_event);
-
-	rcu_read_unlock();
+	return event->attr.comm || event->attr.mmap ||
+	       event->attr.mmap_data || event->attr.task;
 }
 
 static void perf_event_task(struct task_struct *task,
···
 		},
 	};
 
-	perf_event_task_event(&task_event);
+	perf_event_aux(perf_event_task_match,
+		       perf_event_task_output,
+		       &task_event,
+		       task_ctx);
 }
 
 void perf_event_fork(struct task_struct *task)
···
 };
 
 static void perf_event_comm_output(struct perf_event *event,
-				     struct perf_comm_event *comm_event)
+				   void *data)
 {
+	struct perf_comm_event *comm_event = data;
 	struct perf_output_handle handle;
 	struct perf_sample_data sample;
 	int size = comm_event->event_id.header.size;
···
 	comm_event->event_id.header.size = size;
 }
 
-static int perf_event_comm_match(struct perf_event *event)
+static int perf_event_comm_match(struct perf_event *event,
+				 void *data __maybe_unused)
 {
-	if (event->state < PERF_EVENT_STATE_INACTIVE)
-		return 0;
-
-	if (!event_filter_match(event))
-		return 0;
-
-	if (event->attr.comm)
-		return 1;
-
-	return 0;
-}
-
-static void perf_event_comm_ctx(struct perf_event_context *ctx,
-				  struct perf_comm_event *comm_event)
-{
-	struct perf_event *event;
-
-	list_for_each_entry_rcu(event, &ctx->event_list, event_entry) {
-		if (perf_event_comm_match(event))
-			perf_event_comm_output(event, comm_event);
-	}
+	return event->attr.comm;
 }
 
 static void perf_event_comm_event(struct perf_comm_event *comm_event)
 {
-	struct perf_cpu_context *cpuctx;
-	struct perf_event_context *ctx;
 	char comm[TASK_COMM_LEN];
 	unsigned int size;
-	struct pmu *pmu;
-	int ctxn;
 
 	memset(comm, 0, sizeof(comm));
 	strlcpy(comm, comm_event->task->comm, sizeof(comm));
···
 	comm_event->comm_size = size;
 
 	comm_event->event_id.header.size = sizeof(comm_event->event_id) + size;
-	rcu_read_lock();
-	list_for_each_entry_rcu(pmu, &pmus, entry) {
-		cpuctx = get_cpu_ptr(pmu->pmu_cpu_context);
-		if (cpuctx->unique_pmu != pmu)
-			goto next;
-		perf_event_comm_ctx(&cpuctx->ctx, comm_event);
 
-		ctxn = pmu->task_ctx_nr;
-		if (ctxn < 0)
-			goto next;
-
-		ctx = rcu_dereference(current->perf_event_ctxp[ctxn]);
-		if (ctx)
-			perf_event_comm_ctx(ctx, comm_event);
-next:
-		put_cpu_ptr(pmu->pmu_cpu_context);
-	}
-	rcu_read_unlock();
+	perf_event_aux(perf_event_comm_match,
+		       perf_event_comm_output,
+		       comm_event,
+		       NULL);
 }
 
 void perf_event_comm(struct task_struct *task)
···
 };
 
 static void perf_event_mmap_output(struct perf_event *event,
-				     struct perf_mmap_event *mmap_event)
+				   void *data)
 {
+	struct perf_mmap_event *mmap_event = data;
 	struct perf_output_handle handle;
 	struct perf_sample_data sample;
 	int size = mmap_event->event_id.header.size;
···
 }
 
 static int perf_event_mmap_match(struct perf_event *event,
-				   struct perf_mmap_event *mmap_event,
-				   int executable)
+				 void *data)
 {
-	if (event->state < PERF_EVENT_STATE_INACTIVE)
-		return 0;
+	struct perf_mmap_event *mmap_event = data;
+	struct vm_area_struct *vma = mmap_event->vma;
+	int executable = vma->vm_flags & VM_EXEC;
 
-	if (!event_filter_match(event))
-		return 0;
-
-	if ((!executable && event->attr.mmap_data) ||
-	    (executable && event->attr.mmap))
-		return 1;
-
-	return 0;
-}
-
-static void perf_event_mmap_ctx(struct perf_event_context *ctx,
-				  struct perf_mmap_event *mmap_event,
-				  int executable)
-{
-	struct perf_event *event;
-
-	list_for_each_entry_rcu(event, &ctx->event_list, event_entry) {
-		if (perf_event_mmap_match(event, mmap_event, executable))
-			perf_event_mmap_output(event, mmap_event);
-	}
+	return (!executable && event->attr.mmap_data) ||
+	       (executable && event->attr.mmap);
 }
 
 static void perf_event_mmap_event(struct perf_mmap_event *mmap_event)
 {
-	struct perf_cpu_context *cpuctx;
-	struct perf_event_context *ctx;
 	struct vm_area_struct *vma = mmap_event->vma;
 	struct file *file = vma->vm_file;
 	unsigned int size;
 	char tmp[16];
 	char *buf = NULL;
 	const char *name;
-	struct pmu *pmu;
-	int ctxn;
 
 	memset(tmp, 0, sizeof(tmp));
 
···
 
 	mmap_event->event_id.header.size = sizeof(mmap_event->event_id) + size;
 
-	rcu_read_lock();
-	list_for_each_entry_rcu(pmu, &pmus, entry) {
-		cpuctx = get_cpu_ptr(pmu->pmu_cpu_context);
-		if (cpuctx->unique_pmu != pmu)
-			goto next;
-		perf_event_mmap_ctx(&cpuctx->ctx, mmap_event,
-					vma->vm_flags & VM_EXEC);
-
-		ctxn = pmu->task_ctx_nr;
-		if (ctxn < 0)
-			goto next;
-
-		ctx = rcu_dereference(current->perf_event_ctxp[ctxn]);
-		if (ctx) {
-			perf_event_mmap_ctx(ctx, mmap_event,
-					vma->vm_flags & VM_EXEC);
-		}
-next:
-		put_cpu_ptr(pmu->pmu_cpu_context);
-	}
-	rcu_read_unlock();
+	perf_event_aux(perf_event_mmap_match,
+		       perf_event_mmap_output,
+		       mmap_event,
+		       NULL);
 
 	kfree(buf);
 }

kernel/kmod.c

···
 	int retval = 0;
 
 	helper_lock();
+	if (!sub_info->path) {
+		retval = -EINVAL;
+		goto out;
+	}
+
 	if (sub_info->path[0] == '\0')
 		goto out;
 

kernel/module.c

···
 	kmemleak_scan_area(mod, sizeof(struct module), GFP_KERNEL);
 
 	for (i = 1; i < info->hdr->e_shnum; i++) {
-		const char *name = info->secstrings + info->sechdrs[i].sh_name;
-		if (!(info->sechdrs[i].sh_flags & SHF_ALLOC))
-			continue;
-		if (!strstarts(name, ".data") && !strstarts(name, ".bss"))
+		/* Scan all writable sections that's not executable */
+		if (!(info->sechdrs[i].sh_flags & SHF_ALLOC) ||
+		    !(info->sechdrs[i].sh_flags & SHF_WRITE) ||
+		    (info->sechdrs[i].sh_flags & SHF_EXECINSTR))
 			continue;
 
 		kmemleak_scan_area((void *)info->sechdrs[i].sh_addr,
···
 	mod->trace_events = section_objs(info, "_ftrace_events",
 					 sizeof(*mod->trace_events),
 					 &mod->num_trace_events);
-	/*
-	 * This section contains pointers to allocated objects in the trace
-	 * code and not scanning it leads to false positives.
-	 */
-	kmemleak_scan_area(mod->trace_events, sizeof(*mod->trace_events) *
-			   mod->num_trace_events, GFP_KERNEL);
 #endif
 #ifdef CONFIG_TRACING
 	mod->trace_bprintk_fmt_start = section_objs(info, "__trace_printk_fmt",
 					 sizeof(*mod->trace_bprintk_fmt_start),
 					 &mod->num_trace_bprintk_fmt);
-	/*
-	 * This section contains pointers to allocated objects in the trace
-	 * code and not scanning it leads to false positives.
-	 */
-	kmemleak_scan_area(mod->trace_bprintk_fmt_start,
-			   sizeof(*mod->trace_bprintk_fmt_start) *
-			   mod->num_trace_bprintk_fmt, GFP_KERNEL);
 #endif
 #ifdef CONFIG_FTRACE_MCOUNT_RECORD
 	/* sechdrs[0].sh_size is always zero */

kernel/rcutree_plugin.h

···
 #ifdef CONFIG_RCU_NOCB_CPU
 #ifndef CONFIG_RCU_NOCB_CPU_NONE
 	if (!have_rcu_nocb_mask) {
-		alloc_bootmem_cpumask_var(&rcu_nocb_mask);
+		zalloc_cpumask_var(&rcu_nocb_mask, GFP_KERNEL);
 		have_rcu_nocb_mask = true;
 	}
 #ifdef CONFIG_RCU_NOCB_CPU_ZERO
···
 	rdtp->last_accelerate = jiffies;
 
 	/* Request timer delay depending on laziness, and round. */
-	if (rdtp->all_lazy) {
+	if (!rdtp->all_lazy) {
 		*dj = round_up(rcu_idle_gp_delay + jiffies,
 			       rcu_idle_gp_delay) - jiffies;
 	} else {

kernel/time/Kconfig

···
 config ARCH_CLOCKSOURCE_DATA
 	bool
 
-# Platforms has a persistent clock
-config ALWAYS_USE_PERSISTENT_CLOCK
-	bool
-	default n
-
 # Timekeeping vsyscall support
 config GENERIC_TIME_VSYSCALL
 	bool

kernel/time/tick-broadcast.c

···
 
 void __init tick_broadcast_init(void)
 {
-	alloc_cpumask_var(&tick_broadcast_mask, GFP_NOWAIT);
-	alloc_cpumask_var(&tmpmask, GFP_NOWAIT);
+	zalloc_cpumask_var(&tick_broadcast_mask, GFP_NOWAIT);
+	zalloc_cpumask_var(&tmpmask, GFP_NOWAIT);
 #ifdef CONFIG_TICK_ONESHOT
-	alloc_cpumask_var(&tick_broadcast_oneshot_mask, GFP_NOWAIT);
-	alloc_cpumask_var(&tick_broadcast_pending_mask, GFP_NOWAIT);
-	alloc_cpumask_var(&tick_broadcast_force_mask, GFP_NOWAIT);
+	zalloc_cpumask_var(&tick_broadcast_oneshot_mask, GFP_NOWAIT);
+	zalloc_cpumask_var(&tick_broadcast_pending_mask, GFP_NOWAIT);
+	zalloc_cpumask_var(&tick_broadcast_force_mask, GFP_NOWAIT);
 #endif
 }

kernel/time/tick-sched.c

···
 	if (unlikely(!cpu_online(cpu))) {
 		if (cpu == tick_do_timer_cpu)
 			tick_do_timer_cpu = TICK_DO_TIMER_NONE;
+		return false;
 	}
 
 	if (unlikely(ts->nohz_mode == NOHZ_MODE_INACTIVE))
···
 		hrtimer_cancel(&ts->sched_timer);
 # endif
 
-	ts->nohz_mode = NOHZ_MODE_INACTIVE;
+	memset(ts, 0, sizeof(*ts));
 }
 #endif
 

kernel/timer.c

···
 			boot_done = 1;
 			base = &boot_tvec_bases;
 		}
+		spin_lock_init(&base->lock);
 		tvec_base_done[cpu] = 1;
 	} else {
 		base = per_cpu(tvec_bases, cpu);
 	}
 
-	spin_lock_init(&base->lock);
 
 	for (j = 0; j < TVN_SIZE; j++) {
 		INIT_LIST_HEAD(base->tv5.vec + j);

kernel/trace/trace_events_filter.c

···
 
 static void __free_preds(struct event_filter *filter)
 {
+	int i;
+
 	if (filter->preds) {
+		for (i = 0; i < filter->n_preds; i++)
+			kfree(filter->preds[i].ops);
 		kfree(filter->preds);
 		filter->preds = NULL;
 	}

kernel/trace/trace_kprobe.c

···
 	const char		*symbol;	/* symbol name */
 	struct ftrace_event_class	class;
 	struct ftrace_event_call	call;
-	struct ftrace_event_file	**files;
+	struct ftrace_event_file * __rcu *files;
 	ssize_t			size;		/* trace entry size */
 	unsigned int		nr_args;
 	struct probe_arg	args[];
···
 
 static int trace_probe_nr_files(struct trace_probe *tp)
 {
-	struct ftrace_event_file **file = tp->files;
+	struct ftrace_event_file **file;
 	int ret = 0;
 
+	/*
+	 * Since all tp->files updater is protected by probe_enable_lock,
+	 * we don't need to lock an rcu_read_lock.
+	 */
+	file = rcu_dereference_raw(tp->files);
 	if (file)
 		while (*(file++))
 			ret++;
···
 	mutex_lock(&probe_enable_lock);
 
 	if (file) {
-		struct ftrace_event_file **new, **old = tp->files;
+		struct ftrace_event_file **new, **old;
 		int n = trace_probe_nr_files(tp);
 
+		old = rcu_dereference_raw(tp->files);
 		/* 1 is for new one and 1 is for stopper */
 		new = kzalloc((n + 2) * sizeof(struct ftrace_event_file *),
 			      GFP_KERNEL);
···
 static int
 trace_probe_file_index(struct trace_probe *tp, struct ftrace_event_file *file)
 {
+	struct ftrace_event_file **files;
 	int i;
 
-	if (tp->files) {
-		for (i = 0; tp->files[i]; i++)
-			if (tp->files[i] == file)
+	/*
+	 * Since all tp->files updater is protected by probe_enable_lock,
+	 * we don't need to lock an rcu_read_lock.
+	 */
+	files = rcu_dereference_raw(tp->files);
+	if (files) {
+		for (i = 0; files[i]; i++)
+			if (files[i] == file)
 				return i;
 	}
 
···
 	mutex_lock(&probe_enable_lock);
 
 	if (file) {
-		struct ftrace_event_file **new, **old = tp->files;
+		struct ftrace_event_file **new, **old;
 		int n = trace_probe_nr_files(tp);
 		int i, j;
 
+		old = rcu_dereference_raw(tp->files);
 		if (n == 0 || trace_probe_file_index(tp, file) < 0) {
 			ret = -EINVAL;
 			goto out_unlock;
···
 static __kprobes void
 kprobe_trace_func(struct trace_probe *tp, struct pt_regs *regs)
 {
-	struct ftrace_event_file **file = tp->files;
+	/*
+	 * Note: preempt is already disabled around the kprobe handler.
+	 * However, we still need an smp_read_barrier_depends() corresponding
+	 * to smp_wmb() in rcu_assign_pointer() to access the pointer.
+	 */
+	struct ftrace_event_file **file = rcu_dereference_raw(tp->files);
 
-	/* Note: preempt is already disabled around the kprobe handler */
+	if (unlikely(!file))
+		return;
+
 	while (*file) {
 		__kprobe_trace_func(tp, regs, *file);
 		file++;
···
 kretprobe_trace_func(struct trace_probe *tp, struct kretprobe_instance *ri,
 		     struct pt_regs *regs)
 {
-	struct ftrace_event_file **file = tp->files;
+	/*
+	 * Note: preempt is already disabled around the kprobe handler.
+	 * However, we still need an smp_read_barrier_depends() corresponding
+	 * to smp_wmb() in rcu_assign_pointer() to access the pointer.
+	 */
+	struct ftrace_event_file **file = rcu_dereference_raw(tp->files);
 
-	/* Note: preempt is already disabled around the kprobe handler */
+	if (unlikely(!file))
+		return;
+
 	while (*file) {
 		__kretprobe_trace_func(tp, ri, regs, *file);
 		file++;
···
 }
 
 /* Event entry printers */
-enum print_line_t
+static enum print_line_t
 print_kprobe_event(struct trace_iterator *iter, int flags,
 		   struct trace_event *event)
 {
···
 	return TRACE_TYPE_PARTIAL_LINE;
 }
 
-enum print_line_t
+static enum print_line_t
 print_kretprobe_event(struct trace_iterator *iter, int flags,
 		      struct trace_event *event)
 {

kernel/workqueue.c

···
 static struct workqueue_attrs *unbound_std_wq_attrs[NR_STD_WORKER_POOLS];
 
 struct workqueue_struct *system_wq __read_mostly;
-EXPORT_SYMBOL_GPL(system_wq);
+EXPORT_SYMBOL(system_wq);
 struct workqueue_struct *system_highpri_wq __read_mostly;
 EXPORT_SYMBOL_GPL(system_highpri_wq);
 struct workqueue_struct *system_long_wq __read_mostly;
···
 	local_irq_restore(flags);
 	return ret;
 }
-EXPORT_SYMBOL_GPL(queue_work_on);
+EXPORT_SYMBOL(queue_work_on);
 
 void delayed_work_timer_fn(unsigned long __data)
 {
···
 	local_irq_restore(flags);
 	return ret;
 }
-EXPORT_SYMBOL_GPL(queue_delayed_work_on);
+EXPORT_SYMBOL(queue_delayed_work_on);
 
 /**
  * mod_delayed_work_on - modify delay of or queue a delayed work on specific CPU
···
 	if (unlikely(!mutex_trylock(&pool->manager_mutex))) {
 		spin_unlock_irq(&pool->lock);
 		mutex_lock(&pool->manager_mutex);
+		spin_lock_irq(&pool->lock);
 		ret = true;
 	}
 
···
  * no synchronization around this function and the test result is
  * unreliable and only useful as advisory hints or for debugging.
  *
+ * If @cpu is WORK_CPU_UNBOUND, the test is performed on the local CPU.
+ * Note that both per-cpu and unbound workqueues may be associated with
+ * multiple pool_workqueues which have separate congested states.  A
+ * workqueue being congested on one CPU doesn't mean the workqueue is also
+ * contested on other CPUs / NUMA nodes.
+ *
  * RETURNS:
  * %true if congested, %false otherwise.
  */
···
 	bool ret;
 
 	rcu_read_lock_sched();
+
+	if (cpu == WORK_CPU_UNBOUND)
+		cpu = smp_processor_id();
 
 	if (!(wq->flags & WQ_UNBOUND))
 		pwq = per_cpu_ptr(wq->cpu_pwqs, cpu);
···
 	BUG_ON(!tbl);
 
 	for_each_node(node)
-		BUG_ON(!alloc_cpumask_var_node(&tbl[node], GFP_KERNEL, node));
+		BUG_ON(!alloc_cpumask_var_node(&tbl[node], GFP_KERNEL,
+				node_online(node) ? node : NUMA_NO_NODE));
 
 	for_each_possible_cpu(cpu) {
 		node = cpu_to_node(cpu);

net/batman-adv/distributed-arp-table.c

···
 
 	dat_entry = batadv_dat_entry_hash_find(bat_priv, ip_dst);
 	if (dat_entry) {
+		/* If the ARP request is destined for a local client the local
+		 * client will answer itself. DAT would only generate a
+		 * duplicate packet.
+		 *
+		 * Moreover, if the soft-interface is enslaved into a bridge, an
+		 * additional DAT answer may trigger kernel warnings about
+		 * a packet coming from the wrong port.
+		 */
+		if (batadv_is_my_client(bat_priv, dat_entry->mac_addr)) {
+			ret = true;
+			goto out;
+		}
+
 		skb_new = arp_create(ARPOP_REPLY, ETH_P_ARP, ip_src,
 				     bat_priv->soft_iface, ip_dst, hw_src,
 				     dat_entry->mac_addr, hw_src);

net/batman-adv/main.c

···
 	batadv_vis_quit(bat_priv);
 
 	batadv_gw_node_purge(bat_priv);
-	batadv_originator_free(bat_priv);
 	batadv_nc_free(bat_priv);
-
-	batadv_tt_free(bat_priv);
-
+	batadv_dat_free(bat_priv);
 	batadv_bla_free(bat_priv);
 
-	batadv_dat_free(bat_priv);
+	/* Free the TT and the originator tables only after having terminated
+	 * all the other depending components which may use these structures for
+	 * their purposes.
+	 */
+	batadv_tt_free(bat_priv);
+
+	/* Since the originator table clean up routine is accessing the TT
+	 * tables as well, it has to be invoked after the TT tables have been
+	 * freed and marked as empty. This ensures that no cleanup RCU callbacks
+	 * accessing the TT data are scheduled for later execution.
+	 */
+	batadv_originator_free(bat_priv);
 
 	free_percpu(bat_priv->bat_counters);
 
···
 	char *algo_name = (char *)val;
 	size_t name_len = strlen(algo_name);
 
-	if (algo_name[name_len - 1] == '\n')
+	if (name_len > 0 && algo_name[name_len - 1] == '\n')
 		algo_name[name_len - 1] = '\0';
 
 	bat_algo_ops = batadv_algo_get(algo_name);

net/batman-adv/network-coding.c

···
 	struct ethhdr *ethhdr, ethhdr_tmp;
 	uint8_t *orig_dest, ttl, ttvn;
 	unsigned int coding_len;
+	int err;
 
 	/* Save headers temporarily */
 	memcpy(&coded_packet_tmp, skb->data, sizeof(coded_packet_tmp));
···
 			 coding_len);
 
 	/* Resize decoded skb if decoded with larger packet */
-	if (nc_packet->skb->len > coding_len + h_size)
-		pskb_trim_rcsum(skb, coding_len + h_size);
+	if (nc_packet->skb->len > coding_len + h_size) {
+		err = pskb_trim_rcsum(skb, coding_len + h_size);
+		if (err)
+			return NULL;
+	}
 
 	/* Create decoded unicast packet */
 	unicast_packet = (struct batadv_unicast_packet *)skb->data;

net/ceph/osd_client.c

···
 	mutex_lock(&osdc->request_mutex);
 	if (req->r_linger) {
 		__unregister_linger_request(osdc, req);
+		req->r_linger = 0;
 		ceph_osdc_put_request(req);
 	}
 	mutex_unlock(&osdc->request_mutex);
···
 	down_read(&osdc->map_sem);
 	mutex_lock(&osdc->request_mutex);
 	__register_request(osdc, req);
-	WARN_ON(req->r_sent);
+	req->r_sent = 0;
+	req->r_got_reply = 0;
+	req->r_completed = 0;
 	rc = __map_request(osdc, req, 0);
 	if (rc < 0) {
 		if (nofail) {

net/core/sock.c

···
 #endif
 }
 
-/*
- * caches using SLAB_DESTROY_BY_RCU should let .next pointer from nulls nodes
- * un-modified. Special care is taken when initializing object to zero.
- */
-static inline void sk_prot_clear_nulls(struct sock *sk, int size)
-{
-	if (offsetof(struct sock, sk_node.next) != 0)
-		memset(sk, 0, offsetof(struct sock, sk_node.next));
-	memset(&sk->sk_node.pprev, 0,
-	       size - offsetof(struct sock, sk_node.pprev));
-}
-
 void sk_prot_clear_portaddr_nulls(struct sock *sk, int size)
 {
 	unsigned long nulls1, nulls2;

net/ipv4/ip_output.c

···
 EXPORT_SYMBOL(sysctl_ip_default_ttl);
 
 /* Generate a checksum for an outgoing IP datagram. */
-__inline__ void ip_send_check(struct iphdr *iph)
+void ip_send_check(struct iphdr *iph)
 {
 	iph->check = 0;
 	iph->check = ip_fast_csum((unsigned char *)iph, iph->ihl);

net/ipv6/ip6_gre.c

···
 		}
 		if (t == NULL)
 			t = netdev_priv(dev);
+		memset(&p, 0, sizeof(p));
 		ip6gre_tnl_parm_to_user(&p, &t->parms);
 		if (copy_to_user(ifr->ifr_ifru.ifru_data, &p, sizeof(p)))
 			err = -EFAULT;
···
 		if (t) {
 			err = 0;
 
+			memset(&p, 0, sizeof(p));
 			ip6gre_tnl_parm_to_user(&p, &t->parms);
 			if (copy_to_user(ifr->ifr_ifru.ifru_data, &p, sizeof(p)))
 				err = -EFAULT;

net/ipv6/tcp_ipv6.c

···
 }
 #endif
 
+static void tcp_v6_clear_sk(struct sock *sk, int size)
+{
+	struct inet_sock *inet = inet_sk(sk);
+
+	/* we do not want to clear pinet6 field, because of RCU lookups */
+	sk_prot_clear_nulls(sk, offsetof(struct inet_sock, pinet6));
+
+	size -= offsetof(struct inet_sock, pinet6) + sizeof(inet->pinet6);
+	memset(&inet->pinet6 + 1, 0, size);
+}
+
 struct proto tcpv6_prot = {
 	.name			= "TCPv6",
 	.owner			= THIS_MODULE,
···
 #ifdef CONFIG_MEMCG_KMEM
 	.proto_cgroup		= tcp_proto_cgroup,
 #endif
+	.clear_sk		= tcp_v6_clear_sk,
 };
 
 static const struct inet6_protocol tcpv6_protocol = {

net/ipv6/udp.c

···
 }
 #endif /* CONFIG_PROC_FS */
 
+void udp_v6_clear_sk(struct sock *sk, int size)
+{
+	struct inet_sock *inet = inet_sk(sk);
+
+	/* we do not want to clear pinet6 field, because of RCU lookups */
+	sk_prot_clear_portaddr_nulls(sk, offsetof(struct inet_sock, pinet6));
+
+	size -= offsetof(struct inet_sock, pinet6) + sizeof(inet->pinet6);
+	memset(&inet->pinet6 + 1, 0, size);
+}
+
 /* ------------------------------------------------------------------------ */
 
 struct proto udpv6_prot = {
···
 	.compat_setsockopt = compat_udpv6_setsockopt,
 	.compat_getsockopt = compat_udpv6_getsockopt,
 #endif
-	.clear_sk	   = sk_prot_clear_portaddr_nulls,
+	.clear_sk	   = udp_v6_clear_sk,
 };
 
 static struct inet_protosw udpv6_protosw = {

net/ipv6/udp_impl.h

···
 extern int	udpv6_queue_rcv_skb(struct sock * sk, struct sk_buff *skb);
 extern void	udpv6_destroy_sock(struct sock *sk);
 
+extern void udp_v6_clear_sk(struct sock *sk, int size);
+
 #ifdef CONFIG_PROC_FS
 extern int	udp6_seq_show(struct seq_file *seq, void *v);
 #endif

net/ipv6/udplite.c

···
 	.compat_setsockopt = compat_udpv6_setsockopt,
 	.compat_getsockopt = compat_udpv6_getsockopt,
 #endif
-	.clear_sk	   = sk_prot_clear_portaddr_nulls,
+	.clear_sk	   = udp_v6_clear_sk,
 };
 
 static struct inet_protosw udplite6_protosw = {

net/ipv6/xfrm6_policy.c

···
 	dev_hold(dev);
 
 	xdst->u.rt6.rt6i_idev = in6_dev_get(dev);
-	if (!xdst->u.rt6.rt6i_idev)
+	if (!xdst->u.rt6.rt6i_idev) {
+		dev_put(dev);
 		return -ENODEV;
+	}
 
 	rt6_transfer_peer(&xdst->u.rt6, rt);
 

scripts/package/Makefile

···
 	mv -f $(objtree)/.tmp_version $(objtree)/.version
 
 	$(RPM) $(RPMOPTS) --define "_builddir $(objtree)" --target \
-		$(UTS_MACHINE) -bb $<
+		$(UTS_MACHINE) -bb $(objtree)/binkernel.spec
 	rm binkernel.spec
 
 # Deb target

sound/aoa/fabrics/layout.c

···
 MODULE_ALIAS("aoa-device-id-14");
 MODULE_ALIAS("aoa-device-id-22");
 MODULE_ALIAS("aoa-device-id-35");
+MODULE_ALIAS("aoa-device-id-44");
 
 /* onyx with all but microphone connected */
 static struct codec_connection onyx_connections_nomic[] = {
···
 	  .codecs[0] = {
 		.name = "tas",
 		.connections = tas_connections_nolineout,
+	  },
+	},
+	/* PowerBook6,5 */
+	{ .device_id = 44,
+	  .codecs[0] = {
+		.name = "tas",
+		.connections = tas_connections_all,
 	  },
 	},
 	/* PowerBook6,7 */

sound/aoa/soundbus/i2sbus/core.c

···
 			 * We probably cannot handle all device-id machines,
 			 * so restrict to those we do handle for now.
 			 */
-			if (id && (*id == 22 || *id == 14 || *id == 35)) {
+			if (id && (*id == 22 || *id == 14 || *id == 35 ||
+				   *id == 44)) {
 				snprintf(dev->sound.modalias, 32,
 					 "aoa-device-id-%d", *id);
 				ok = 1;

sound/oss/Kconfig

···
 menuconfig SOUND_OSS
 	tristate "OSS sound modules"
 	depends on ISA_DMA_API && VIRT_TO_BUS
-	depends on !ISA_DMA_SUPPORT_BROKEN
+	depends on !GENERIC_ISA_DMA_SUPPORT_BROKEN
 	help
 	  OSS is the Open Sound System suite of sound card drivers.  They make
 	  sound programming easier since they provide a common API.  Say Y or

sound/pci/hda/hda_generic.c

···
 	return false;
 }
 
+/* check whether the NID is referred by any active paths */
+#define is_active_nid_for_any(codec, nid) \
+	is_active_nid(codec, nid, HDA_OUTPUT, 0)
+
 /* get the default amp value for the target state */
 static int get_amp_val_to_activate(struct hda_codec *codec, hda_nid_t nid,
 				   int dir, unsigned int caps, bool enable)
···
 
 	for (i = 0; i < path->depth; i++) {
 		hda_nid_t nid = path->path[i];
-		if (!snd_hda_check_power_state(codec, nid, AC_PWRST_D3)) {
+		if (!snd_hda_check_power_state(codec, nid, AC_PWRST_D3) &&
+		    !is_active_nid_for_any(codec, nid)) {
 			snd_hda_codec_write(codec, nid, 0,
 					    AC_VERB_SET_POWER_STATE,
 					    AC_PWRST_D3);
···
 		return power_state;
 	if (get_wcaps_type(get_wcaps(codec, nid)) >= AC_WID_POWER)
 		return power_state;
-	if (is_active_nid(codec, nid, HDA_OUTPUT, 0))
+	if (is_active_nid_for_any(codec, nid))
 		return power_state;
 	return AC_PWRST_D3;
 }

sound/pci/hda/patch_realtek.c

···
 	SND_PCI_QUIRK(0x1028, 0x05c9, "Dell", ALC269_FIXUP_DELL1_MIC_NO_PRESENCE),
 	SND_PCI_QUIRK(0x1028, 0x05ca, "Dell", ALC269_FIXUP_DELL2_MIC_NO_PRESENCE),
 	SND_PCI_QUIRK(0x1028, 0x05cb, "Dell", ALC269_FIXUP_DELL2_MIC_NO_PRESENCE),
+	SND_PCI_QUIRK(0x1028, 0x05de, "Dell", ALC269_FIXUP_DELL2_MIC_NO_PRESENCE),
 	SND_PCI_QUIRK(0x1028, 0x05e9, "Dell", ALC269_FIXUP_DELL1_MIC_NO_PRESENCE),
 	SND_PCI_QUIRK(0x1028, 0x05ea, "Dell", ALC269_FIXUP_DELL1_MIC_NO_PRESENCE),
 	SND_PCI_QUIRK(0x1028, 0x05eb, "Dell", ALC269_FIXUP_DELL1_MIC_NO_PRESENCE),

sound/soc/codecs/ab8500-codec.h

···
 
 /* AB8500_ADSLOTSELX */
 #define AB8500_ADSLOTSELX_AD_OUT1_TO_SLOT_ODD	0x00
-#define AB8500_ADSLOTSELX_AD_OUT2_TO_SLOT_ODD	0x01
-#define AB8500_ADSLOTSELX_AD_OUT3_TO_SLOT_ODD	0x02
-#define AB8500_ADSLOTSELX_AD_OUT4_TO_SLOT_ODD	0x03
-#define AB8500_ADSLOTSELX_AD_OUT5_TO_SLOT_ODD	0x04
-#define AB8500_ADSLOTSELX_AD_OUT6_TO_SLOT_ODD	0x05
-#define AB8500_ADSLOTSELX_AD_OUT7_TO_SLOT_ODD	0x06
-#define AB8500_ADSLOTSELX_AD_OUT8_TO_SLOT_ODD	0x07
-#define AB8500_ADSLOTSELX_ZEROES_TO_SLOT_ODD	0x08
-#define AB8500_ADSLOTSELX_TRISTATE_TO_SLOT_ODD	0x0F
+#define AB8500_ADSLOTSELX_AD_OUT2_TO_SLOT_ODD	0x10
+#define AB8500_ADSLOTSELX_AD_OUT3_TO_SLOT_ODD	0x20
+#define AB8500_ADSLOTSELX_AD_OUT4_TO_SLOT_ODD	0x30
+#define AB8500_ADSLOTSELX_AD_OUT5_TO_SLOT_ODD	0x40
+#define AB8500_ADSLOTSELX_AD_OUT6_TO_SLOT_ODD	0x50
+#define AB8500_ADSLOTSELX_AD_OUT7_TO_SLOT_ODD	0x60
+#define AB8500_ADSLOTSELX_AD_OUT8_TO_SLOT_ODD	0x70
+#define AB8500_ADSLOTSELX_ZEROES_TO_SLOT_ODD	0x80
+#define AB8500_ADSLOTSELX_TRISTATE_TO_SLOT_ODD	0xF0
 #define AB8500_ADSLOTSELX_AD_OUT1_TO_SLOT_EVEN	0x00
-#define AB8500_ADSLOTSELX_AD_OUT2_TO_SLOT_EVEN	0x10
-#define AB8500_ADSLOTSELX_AD_OUT3_TO_SLOT_EVEN	0x20
-#define AB8500_ADSLOTSELX_AD_OUT4_TO_SLOT_EVEN	0x30
-#define AB8500_ADSLOTSELX_AD_OUT5_TO_SLOT_EVEN	0x40
-#define AB8500_ADSLOTSELX_AD_OUT6_TO_SLOT_EVEN	0x50
-#define AB8500_ADSLOTSELX_AD_OUT7_TO_SLOT_EVEN	0x60
-#define AB8500_ADSLOTSELX_AD_OUT8_TO_SLOT_EVEN	0x70
-#define AB8500_ADSLOTSELX_ZEROES_TO_SLOT_EVEN	0x80
-#define AB8500_ADSLOTSELX_TRISTATE_TO_SLOT_EVEN	0xF0
+#define AB8500_ADSLOTSELX_AD_OUT2_TO_SLOT_EVEN	0x01
+#define AB8500_ADSLOTSELX_AD_OUT3_TO_SLOT_EVEN	0x02
+#define AB8500_ADSLOTSELX_AD_OUT4_TO_SLOT_EVEN	0x03
+#define AB8500_ADSLOTSELX_AD_OUT5_TO_SLOT_EVEN	0x04
+#define AB8500_ADSLOTSELX_AD_OUT6_TO_SLOT_EVEN	0x05
+#define AB8500_ADSLOTSELX_AD_OUT7_TO_SLOT_EVEN	0x06
+#define AB8500_ADSLOTSELX_AD_OUT8_TO_SLOT_EVEN	0x07
+#define AB8500_ADSLOTSELX_ZEROES_TO_SLOT_EVEN	0x08
+#define AB8500_ADSLOTSELX_TRISTATE_TO_SLOT_EVEN	0x0F
 #define AB8500_ADSLOTSELX_EVEN_SHIFT		0
 #define AB8500_ADSLOTSELX_ODD_SHIFT		4
 

sound/soc/codecs/da7213.c

···
 				     DA7213_DMIC_DATA_SEL_SHIFT);
 			break;
 		}
-		switch (pdata->dmic_data_sel) {
+		switch (pdata->dmic_samplephase) {
 		case DA7213_DMIC_SAMPLE_ON_CLKEDGE:
 		case DA7213_DMIC_SAMPLE_BETWEEN_CLKEDGE:
-			dmic_cfg |= (pdata->dmic_data_sel <<
+			dmic_cfg |= (pdata->dmic_samplephase <<
 				     DA7213_DMIC_SAMPLEPHASE_SHIFT);
 			break;
 		}
-		switch (pdata->dmic_data_sel) {
+		switch (pdata->dmic_clk_rate) {
 		case DA7213_DMIC_CLK_3_0MHZ:
 		case DA7213_DMIC_CLK_1_5MHZ:
-			dmic_cfg |= (pdata->dmic_data_sel <<
+			dmic_cfg |= (pdata->dmic_clk_rate <<
 				     DA7213_DMIC_CLK_RATE_SHIFT);
 			break;
 		}

sound/soc/codecs/wm0010.c

···
 		/* On wm0010 only the CLKCTRL1 value is used */
 		pll_rec.clkctrl1 = wm0010->pll_clkctrl1;
 
+		ret = -ENOMEM;
 		len = pll_rec.length + 8;
 		out = kzalloc(len, GFP_KERNEL);
 		if (!out) {

sound/soc/fsl/imx-ssi.c

···
 	clk_prepare_enable(ssi->clk);
 
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (!res) {
-		ret = -ENODEV;
-		goto failed_get_resource;
-	}
-
 	ssi->base = devm_ioremap_resource(&pdev->dev, res);
 	if (IS_ERR(ssi->base)) {
 		ret = PTR_ERR(ssi->base);
···
 	snd_soc_unregister_component(&pdev->dev);
 failed_register:
 	release_mem_region(res->start, resource_size(res));
-failed_get_resource:
 	clk_disable_unprepare(ssi->clk);
 failed_clk:
 

sound/soc/kirkwood/kirkwood-i2s.c

···
 	dev_set_drvdata(&pdev->dev, priv);
 
 	mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (!mem) {
-		dev_err(&pdev->dev, "platform_get_resource failed\n");
-		return -ENXIO;
-	}
-
 	priv->io = devm_ioremap_resource(&pdev->dev, mem);
 	if (IS_ERR(priv->io))
 		return PTR_ERR(priv->io);

sound/usb/proc.c

···
 }
 
 static void proc_dump_ep_status(struct snd_usb_substream *subs,
-				struct snd_usb_endpoint *ep,
+				struct snd_usb_endpoint *data_ep,
+				struct snd_usb_endpoint *sync_ep,
 				struct snd_info_buffer *buffer)
 {
-	if (!ep)
+	if (!data_ep)
 		return;
-	snd_iprintf(buffer, "    Packet Size = %d\n", ep->curpacksize);
+	snd_iprintf(buffer, "    Packet Size = %d\n", data_ep->curpacksize);
 	snd_iprintf(buffer, "    Momentary freq = %u Hz (%#x.%04x)\n",
 		    subs->speed == USB_SPEED_FULL
-		    ? get_full_speed_hz(ep->freqm)
-		    : get_high_speed_hz(ep->freqm),
-		    ep->freqm >> 16, ep->freqm & 0xffff);
-	if (ep->freqshift != INT_MIN) {
-		int res = 16 - ep->freqshift;
+		    ? get_full_speed_hz(data_ep->freqm)
+		    : get_high_speed_hz(data_ep->freqm),
+		    data_ep->freqm >> 16, data_ep->freqm & 0xffff);
+	if (sync_ep && data_ep->freqshift != INT_MIN) {
+		int res = 16 - data_ep->freqshift;
 		snd_iprintf(buffer, "    Feedback Format = %d.%d\n",
-			    (ep->syncmaxsize > 3 ? 32 : 24) - res, res);
+			    (sync_ep->syncmaxsize > 3 ? 32 : 24) - res, res);
 	}
 }
 
···
 		snd_iprintf(buffer, "  Status: Running\n");
 		snd_iprintf(buffer, "    Interface = %d\n", subs->interface);
 		snd_iprintf(buffer, "    Altset = %d\n", subs->altset_idx);
-		proc_dump_ep_status(subs, subs->data_endpoint, buffer);
-		proc_dump_ep_status(subs, subs->sync_endpoint, buffer);
+		proc_dump_ep_status(subs, subs->data_endpoint, subs->sync_endpoint, buffer);
 	} else {
 		snd_iprintf(buffer, "  Status: Stop\n");
 	}