Merge branch 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc

* 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc: (25 commits)
powerpc: Disable 64K hugetlb support when doing 64K SPU mappings
powerpc/powermac: Fixup default serial port device for pmac_zilog
powerpc/powermac: Use sane default baudrate for SCC debugging
powerpc/mm: Implement _PAGE_SPECIAL & pte_special() for 64-bit
powerpc: Show processor cache information in sysfs
powerpc: Make core id information available to userspace
powerpc: Make core sibling information available to userspace
powerpc/vio: More fallout from dma_mapping_error API change
ibmveth: Fix multiple errors with dma_mapping_error conversion
powerpc/pseries: Fix CMO sysdev attribute API change fallout
powerpc: Enable tracehook for the architecture
powerpc: Add TIF_NOTIFY_RESUME support for tracehook
powerpc: Add asm/syscall.h with the tracehook entry points
powerpc: Make syscall tracing use tracehook.h helpers
powerpc: Call tracehook_signal_handler() when setting up signal frames
powerpc: Update cpu_sibling_maps dynamically
powerpc: register_cpu_online should be __cpuinit
powerpc: kill useless SMT code in prom_hold_cpus
powerpc: Fix 8xx build failure
powerpc: Fix vio build warnings
...

arch/powerpc/Kconfig

···
 	select HAVE_KPROBES
 	select HAVE_ARCH_KGDB
 	select HAVE_KRETPROBES
+	select HAVE_ARCH_TRACEHOOK
 	select HAVE_LMB
 	select HAVE_DMA_ATTRS if PPC64
 	select USE_GENERIC_SMP_HELPERS if SMP

arch/powerpc/kernel/entry_32.S

···
 	/* Check to see if the dbcr0 register is set up to debug.  Use the
 	   internal debug mode bit to do this. */
 	lwz	r12,THREAD_DBCR0(r12)
-	andis.	r12,r12,(DBCR0_IDM  | DBSR_DAC1R | DBSR_DAC1W)@h
+	andis.	r12,r12,DBCR0_IDM@h
 	beq+	3f
 	/* From user and task is ptraced - load up global dbcr0 */
 	li	r12,-1			/* clear all pending debug events */
···
 	/* If the process has its own DBCR0 value, load it up.  The internal
 	   debug mode bit tells us that dbcr0 should be loaded. */
 	lwz	r0,THREAD+THREAD_DBCR0(r2)
-	andis.	r10,r0,(DBCR0_IDM  | DBSR_DAC1R | DBSR_DAC1W)@h
+	andis.	r10,r0,DBCR0_IDM@h
 	bnel-	load_dbcr0
 #endif
 #ifdef CONFIG_44x
···
 	stw	r0,_TRAP(r1)
 	addi	r3,r1,STACK_FRAME_OVERHEAD
 	bl	do_syscall_trace_enter
-	lwz	r0,GPR0(r1)	/* Restore original registers */
+	/*
+	 * Restore argument registers possibly just changed.
+	 * We use the return value of do_syscall_trace_enter
+	 * for call number to look up in the table (r0).
+	 */
+	mr	r0,r3
 	lwz	r3,GPR3(r1)
 	lwz	r4,GPR4(r1)
 	lwz	r5,GPR5(r1)
···
 	/* Check whether this process has its own DBCR0 value.  The internal
 	   debug mode bit tells us that dbcr0 should be loaded. */
 	lwz	r0,THREAD+THREAD_DBCR0(r2)
-	andis.	r10,r0,(DBCR0_IDM  | DBSR_DAC1R | DBSR_DAC1W)@h
+	andis.	r10,r0,DBCR0_IDM@h
 	bnel-	load_dbcr0
 #endif
 
···
 	SAVE_NVGPRS(r1)
 	rlwinm	r3,r3,0,0,30
 	stw	r3,_TRAP(r1)
-2:	li	r3,0
-	addi	r4,r1,STACK_FRAME_OVERHEAD
+2:	addi	r3,r1,STACK_FRAME_OVERHEAD
+	mr	r4,r9
 	bl	do_signal
 	REST_NVGPRS(r1)
 	b	recheck

arch/powerpc/kernel/entry_64.S

···
 	bl	.save_nvgprs
 	addi	r3,r1,STACK_FRAME_OVERHEAD
 	bl	.do_syscall_trace_enter
-	ld	r0,GPR0(r1)	/* Restore original registers */
+	/*
+	 * Restore argument registers possibly just changed.
+	 * We use the return value of do_syscall_trace_enter
+	 * for the call number to look up in the table (r0).
+	 */
+	mr	r0,r3
 	ld	r3,GPR3(r1)
 	ld	r4,GPR4(r1)
 	ld	r5,GPR5(r1)
···
 	b	.ret_from_except_lite
 
 1:	bl	.save_nvgprs
-	li	r3,0
-	addi	r4,r1,STACK_FRAME_OVERHEAD
+	addi	r3,r1,STACK_FRAME_OVERHEAD
 	bl	.do_signal
 	b	.ret_from_except
 

arch/powerpc/kernel/legacy_serial.c

···
 device_initcall(serial_dev_init);
 
 
+#ifdef CONFIG_SERIAL_8250_CONSOLE
 /*
  * This is called very early, as part of console_init() (typically just after
  * time_init()). This function is respondible for trying to find a good
  * default console on serial ports. It tries to match the open firmware
- * default output with one of the available serial console drivers, either
- * one of the platform serial ports that have been probed earlier by
- * find_legacy_serial_ports() or some more platform specific ones.
+ * default output with one of the available serial console drivers that have
+ * been probed earlier by find_legacy_serial_ports()
  */
 static int __init check_legacy_serial_console(void)
 {
 	struct device_node *prom_stdout = NULL;
-	int speed = 0, offset = 0;
+	int i, speed = 0, offset = 0;
 	const char *name;
 	const u32 *spd;
 
···
 	if (spd)
 		speed = *spd;
 
-	if (0)
-		;
-#ifdef CONFIG_SERIAL_8250_CONSOLE
-	else if (strcmp(name, "serial") == 0) {
-		int i;
-		/* Look for it in probed array */
-		for (i = 0; i < legacy_serial_count; i++) {
-			if (prom_stdout != legacy_serial_infos[i].np)
-				continue;
-			offset = i;
-			speed = legacy_serial_infos[i].speed;
-			break;
-		}
-		if (i >= legacy_serial_count)
-			goto not_found;
-	}
-#endif /* CONFIG_SERIAL_8250_CONSOLE */
-#ifdef CONFIG_SERIAL_PMACZILOG_CONSOLE
-	else if (strcmp(name, "ch-a") == 0)
-		offset = 0;
-	else if (strcmp(name, "ch-b") == 0)
-		offset = 1;
-#endif /* CONFIG_SERIAL_PMACZILOG_CONSOLE */
-	else
+	if (strcmp(name, "serial") != 0)
 		goto not_found;
+
+	/* Look for it in probed array */
+	for (i = 0; i < legacy_serial_count; i++) {
+		if (prom_stdout != legacy_serial_infos[i].np)
+			continue;
+		offset = i;
+		speed = legacy_serial_infos[i].speed;
+		break;
+	}
+	if (i >= legacy_serial_count)
+		goto not_found;
+
 	of_node_put(prom_stdout);
 
 	DBG("Found serial console at ttyS%d\n", offset);
···
 }
 console_initcall(check_legacy_serial_console);
 
+#endif /* CONFIG_SERIAL_8250_CONSOLE */

arch/powerpc/kernel/process.c

···
 		return;
 
 	/* Clear the DAC and struct entries.  One shot trigger */
-#if (defined(CONFIG_44x) || defined(CONFIG_BOOKE))
+#if defined(CONFIG_BOOKE)
 	mtspr(SPRN_DBCR0, mfspr(SPRN_DBCR0) & ~(DBSR_DAC1R | DBSR_DAC1W
 							| DBCR0_IDM));
 #endif
···
 	mtspr(SPRN_DABR, dabr);
 #endif
 
-#if defined(CONFIG_44x) || defined(CONFIG_BOOKE)
+#if defined(CONFIG_BOOKE)
 	mtspr(SPRN_DAC1, dabr);
 #endif
 
···
 	if (unlikely(__get_cpu_var(current_dabr) != new->thread.dabr))
 		set_dabr(new->thread.dabr);
 
-#if defined(CONFIG_44x) || defined(CONFIG_BOOKE)
+#if defined(CONFIG_BOOKE)
 	/* If new thread DAC (HW breakpoint) is the same then leave it */
 	if (new->thread.dabr)
 		set_dabr(new->thread.dabr);
···
 		current->thread.dabr = 0;
 		set_dabr(0);
 
-#if defined(CONFIG_44x) || defined(CONFIG_BOOKE)
+#if defined(CONFIG_BOOKE)
 		current->thread.dbcr0 &= ~(DBSR_DAC1R | DBSR_DAC1W);
 #endif
 	}

arch/powerpc/kernel/prom_init.c

···
 static cell_t __initdata regbuf[1024];
 
 
-#define MAX_CPU_THREADS 2
-
 /*
  * Error results ... some OF calls will return "-1" on error, some
  * will return 0, some will return either. To simplify, here are
···
 	unsigned int reg;
 	phandle node;
 	char type[64];
-	int cpuid = 0;
-	unsigned int interrupt_server[MAX_CPU_THREADS];
-	unsigned int cpu_threads, hw_cpu_num;
-	int propsize;
 	struct prom_t *_prom = &RELOC(prom);
 	unsigned long *spinloop
 		= (void *) LOW_ADDR(__secondary_hold_spinloop);
···
 		reg = -1;
 		prom_getprop(node, "reg", &reg, sizeof(reg));
 
-		prom_debug("\ncpuid        = 0x%x\n", cpuid);
 		prom_debug("cpu hw idx   = 0x%x\n", reg);
 
 		/* Init the acknowledge var which will be reset by
···
 		 */
 		*acknowledge = (unsigned long)-1;
 
-		propsize = prom_getprop(node, "ibm,ppc-interrupt-server#s",
-					&interrupt_server,
-					sizeof(interrupt_server));
-		if (propsize < 0) {
-			/* no property.  old hardware has no SMT */
-			cpu_threads = 1;
-			interrupt_server[0] = reg; /* fake it with phys id */
-		} else {
-			/* We have a threaded processor */
-			cpu_threads = propsize / sizeof(u32);
-			if (cpu_threads > MAX_CPU_THREADS) {
-				prom_printf("SMT: too many threads!\n"
-					    "SMT: found %x, max is %x\n",
-					    cpu_threads, MAX_CPU_THREADS);
-				cpu_threads = 1; /* ToDo: panic? */
-			}
-		}
-
-		hw_cpu_num = interrupt_server[0];
-		if (hw_cpu_num != _prom->cpu) {
+		if (reg != _prom->cpu) {
 			/* Primary Thread of non-boot cpu */
-			prom_printf("%x : starting cpu hw idx %x... ", cpuid, reg);
+			prom_printf("starting cpu hw idx %x... ", reg);
 			call_prom("start-cpu", 3, 0, node,
 				  secondary_hold, reg);
 
···
 		}
 #ifdef CONFIG_SMP
 		else
-			prom_printf("%x : boot cpu     %x\n", cpuid, reg);
+			prom_printf("boot cpu hw idx %x\n", reg);
 #endif /* CONFIG_SMP */
-
-		/* Reserve cpu #s for secondary threads.   They start later. */
-		cpuid += cpu_threads;
 	}
-
-	if (cpuid > NR_CPUS)
-		prom_printf("WARNING: maximum CPUs (" __stringify(NR_CPUS)
-			    ") exceeded: ignoring extras\n");
 
 	prom_debug("prom_hold_cpus: end...\n");
 }

arch/powerpc/kernel/ptrace.c

···
 #include <linux/errno.h>
 #include <linux/ptrace.h>
 #include <linux/regset.h>
+#include <linux/tracehook.h>
 #include <linux/elf.h>
 #include <linux/user.h>
 #include <linux/security.h>
···
 	struct pt_regs *regs = task->thread.regs;
 
 
-#if defined(CONFIG_44x) || defined(CONFIG_BOOKE)
+#if defined(CONFIG_BOOKE)
 	/* If DAC then do not single step, skip */
 	if (task->thread.dabr)
 		return;
···
 	if (addr > 0)
 		return -EINVAL;
 
+	/* The bottom 3 bits in dabr are flags */
 	if ((data & ~0x7UL) >= TASK_SIZE)
 		return -EIO;
 
-#ifdef CONFIG_PPC64
+#ifndef CONFIG_BOOKE
 
 	/* For processors using DABR (i.e. 970), the bottom 3 bits are flags.
 	 *  It was assumed, on previous implementations, that 3 bits were
···
 	task->thread.dabr = data;
 
 #endif
-#if defined(CONFIG_44x) || defined(CONFIG_BOOKE)
+#if defined(CONFIG_BOOKE)
 
 	/* As described above, it was assumed 3 bits were passed with the data
 	 *  address, but we will assume only the mode bits will be passed
···
 	return ret;
 }
 
-static void do_syscall_trace(void)
+/*
+ * We must return the syscall number to actually look up in the table.
+ * This can be -1L to skip running any syscall at all.
+ */
+long do_syscall_trace_enter(struct pt_regs *regs)
 {
-	/* the 0x80 provides a way for the tracing parent to distinguish
-	   between a syscall stop and SIGTRAP delivery */
-	ptrace_notify(SIGTRAP | ((current->ptrace & PT_TRACESYSGOOD)
-				 ? 0x80 : 0));
+	long ret = 0;
 
-	/*
-	 * this isn't the same as continuing with a signal, but it will do
-	 * for normal use.  strace only continues with a signal if the
-	 * stopping signal is not SIGTRAP.  -brl
-	 */
-	if (current->exit_code) {
-		send_sig(current->exit_code, current, 1);
-		current->exit_code = 0;
-	}
-}
-
-void do_syscall_trace_enter(struct pt_regs *regs)
-{
 	secure_computing(regs->gpr[0]);
 
-	if (test_thread_flag(TIF_SYSCALL_TRACE)
-	    && (current->ptrace & PT_PTRACED))
-		do_syscall_trace();
+	if (test_thread_flag(TIF_SYSCALL_TRACE) &&
+	    tracehook_report_syscall_entry(regs))
+		/*
+		 * Tracing decided this syscall should not happen.
+		 * We'll return a bogus call number to get an ENOSYS
+		 * error, but leave the original number in regs->gpr[0].
+		 */
+		ret = -1L;
 
 	if (unlikely(current->audit_context)) {
 #ifdef CONFIG_PPC64
···
 					    regs->gpr[5] & 0xffffffff,
 					    regs->gpr[6] & 0xffffffff);
 	}
+
+	return ret ?: regs->gpr[0];
 }
 
 void do_syscall_trace_leave(struct pt_regs *regs)
 {
+	int step;
+
 	if (unlikely(current->audit_context))
 		audit_syscall_exit((regs->ccr&0x10000000)?AUDITSC_FAILURE:AUDITSC_SUCCESS,
 				   regs->result);
 
-	if ((test_thread_flag(TIF_SYSCALL_TRACE)
-	     || test_thread_flag(TIF_SINGLESTEP))
-	    && (current->ptrace & PT_PTRACED))
-		do_syscall_trace();
+	step = test_thread_flag(TIF_SINGLESTEP);
+	if (step || test_thread_flag(TIF_SYSCALL_TRACE))
+		tracehook_report_syscall_exit(regs, step);
 }

arch/powerpc/kernel/setup-common.c

···
  * setup_cpu_maps - initialize the following cpu maps:
  *                  cpu_possible_map
  *                  cpu_present_map
- *                  cpu_sibling_map
  *
  * Having the possible map set up early allows us to restrict allocations
  * of things like irqstacks to num_possible_cpus() rather than NR_CPUS.
···
 	 * here will have to be reworked
 	 */
 	cpu_init_thread_core_maps(nthreads);
-}
-
-/*
- * Being that cpu_sibling_map is now a per_cpu array, then it cannot
- * be initialized until the per_cpu areas have been created.  This
- * function is now called from setup_per_cpu_areas().
- */
-void __init smp_setup_cpu_sibling_map(void)
-{
-#ifdef CONFIG_PPC64
-	int i, cpu, base;
-
-	for_each_possible_cpu(cpu) {
-		DBG("Sibling map for CPU %d:", cpu);
-		base = cpu_first_thread_in_core(cpu);
-		for (i = 0; i < threads_per_core; i++) {
-			cpu_set(base + i, per_cpu(cpu_sibling_map, cpu));
-			DBG(" %d", base + i);
-		}
-		DBG("\n");
-	}
-
-#endif /* CONFIG_PPC64 */
 }
 #endif /* CONFIG_SMP */
 

arch/powerpc/kernel/setup_64.c

···
 		paca[i].data_offset = ptr - __per_cpu_start;
 		memcpy(ptr, __per_cpu_start, __per_cpu_end - __per_cpu_start);
 	}
-
-	/* Now that per_cpu is setup, initialize cpu_sibling_map */
-	smp_setup_cpu_sibling_map();
 }
 #endif
 

arch/powerpc/kernel/signal.c

···
  * this archive for more details.
  */
 
-#include <linux/ptrace.h>
+#include <linux/tracehook.h>
 #include <linux/signal.h>
 #include <asm/uaccess.h>
 #include <asm/unistd.h>
···
 	}
 }
 
-int do_signal(sigset_t *oldset, struct pt_regs *regs)
+static int do_signal_pending(sigset_t *oldset, struct pt_regs *regs)
 {
 	siginfo_t info;
 	int signr;
···
 	 */
 	if (current->thread.dabr) {
 		set_dabr(current->thread.dabr);
-#if defined(CONFIG_44x) || defined(CONFIG_BOOKE)
+#if defined(CONFIG_BOOKE)
 		mtspr(SPRN_DBCR0, current->thread.dbcr0);
 #endif
 	}
···
 		 * its frame, and we can clear the TLF_RESTORE_SIGMASK flag.
 		 */
 		current_thread_info()->local_flags &= ~_TLF_RESTORE_SIGMASK;
+
+		/*
+		 * Let tracing know that we've done the handler setup.
+		 */
+		tracehook_signal_handler(signr, &info, &ka, regs,
+					 test_thread_flag(TIF_SINGLESTEP));
 	}
 
 	return ret;
+}
+
+void do_signal(struct pt_regs *regs, unsigned long thread_info_flags)
+{
+	if (thread_info_flags & _TIF_SIGPENDING)
+		do_signal_pending(NULL, regs);
+
+	if (thread_info_flags & _TIF_NOTIFY_RESUME) {
+		clear_thread_flag(TIF_NOTIFY_RESUME);
+		tracehook_notify_resume(regs);
+	}
 }
 
 long sys_sigaltstack(const stack_t __user *uss, stack_t __user *uoss,

arch/powerpc/kernel/smp.c

···
 #include <asm/smp.h>
 #include <asm/time.h>
 #include <asm/machdep.h>
+#include <asm/cputhreads.h>
 #include <asm/cputable.h>
 #include <asm/system.h>
 #include <asm/mpic.h>
···
 cpumask_t cpu_possible_map = CPU_MASK_NONE;
 cpumask_t cpu_online_map = CPU_MASK_NONE;
 DEFINE_PER_CPU(cpumask_t, cpu_sibling_map) = CPU_MASK_NONE;
+DEFINE_PER_CPU(cpumask_t, cpu_core_map) = CPU_MASK_NONE;
 
 EXPORT_SYMBOL(cpu_online_map);
 EXPORT_SYMBOL(cpu_possible_map);
 EXPORT_PER_CPU_SYMBOL(cpu_sibling_map);
+EXPORT_PER_CPU_SYMBOL(cpu_core_map);
 
 /* SMP operations for this machine */
 struct smp_ops_t *smp_ops;
···
 	BUG_ON(smp_processor_id() != boot_cpuid);
 
 	cpu_set(boot_cpuid, cpu_online_map);
+	cpu_set(boot_cpuid, per_cpu(cpu_sibling_map, boot_cpuid));
+	cpu_set(boot_cpuid, per_cpu(cpu_core_map, boot_cpuid));
 #ifdef CONFIG_PPC64
 	paca[boot_cpuid].__current = current;
 #endif
···
 	return 0;
 }
 
+/* Return the value of the reg property corresponding to the given
+ * logical cpu.
+ */
+int cpu_to_core_id(int cpu)
+{
+	struct device_node *np;
+	const int *reg;
+	int id = -1;
+
+	np = of_get_cpu_node(cpu, NULL);
+	if (!np)
+		goto out;
+
+	reg = of_get_property(np, "reg", NULL);
+	if (!reg)
+		goto out;
+
+	id = *reg;
+out:
+	of_node_put(np);
+	return id;
+}
+
+/* Must be called when no change can occur to cpu_present_map,
+ * i.e. during cpu online or offline.
+ */
+static struct device_node *cpu_to_l2cache(int cpu)
+{
+	struct device_node *np;
+	const phandle *php;
+	phandle ph;
+
+	if (!cpu_present(cpu))
+		return NULL;
+
+	np = of_get_cpu_node(cpu, NULL);
+	if (np == NULL)
+		return NULL;
+
+	php = of_get_property(np, "l2-cache", NULL);
+	if (php == NULL)
+		return NULL;
+	ph = *php;
+	of_node_put(np);
+
+	return of_find_node_by_phandle(ph);
+}
 
 /* Activate a secondary processor. */
 int __devinit start_secondary(void *unused)
 {
 	unsigned int cpu = smp_processor_id();
+	struct device_node *l2_cache;
+	int i, base;
 
 	atomic_inc(&init_mm.mm_count);
 	current->active_mm = &init_mm;
···
 
 	ipi_call_lock();
 	cpu_set(cpu, cpu_online_map);
+	/* Update sibling maps */
+	base = cpu_first_thread_in_core(cpu);
+	for (i = 0; i < threads_per_core; i++) {
+		if (cpu_is_offline(base + i))
+			continue;
+		cpu_set(cpu, per_cpu(cpu_sibling_map, base + i));
+		cpu_set(base + i, per_cpu(cpu_sibling_map, cpu));
+
+		/* cpu_core_map should be a superset of
+		 * cpu_sibling_map even if we don't have cache
+		 * information, so update the former here, too.
+		 */
+		cpu_set(cpu, per_cpu(cpu_core_map, base +i));
+		cpu_set(base + i, per_cpu(cpu_core_map, cpu));
+	}
+	l2_cache = cpu_to_l2cache(cpu);
+	for_each_online_cpu(i) {
+		struct device_node *np = cpu_to_l2cache(i);
+		if (!np)
+			continue;
+		if (np == l2_cache) {
+			cpu_set(cpu, per_cpu(cpu_core_map, i));
+			cpu_set(i, per_cpu(cpu_core_map, cpu));
+		}
+		of_node_put(np);
+	}
+	of_node_put(l2_cache);
 	ipi_call_unlock();
 
 	local_irq_enable();
···
 #ifdef CONFIG_HOTPLUG_CPU
 int __cpu_disable(void)
 {
-	if (smp_ops->cpu_disable)
-		return smp_ops->cpu_disable();
+	struct device_node *l2_cache;
+	int cpu = smp_processor_id();
+	int base, i;
+	int err;
 
-	return -ENOSYS;
+	if (!smp_ops->cpu_disable)
+		return -ENOSYS;
+
+	err = smp_ops->cpu_disable();
+	if (err)
+		return err;
+
+	/* Update sibling maps */
+	base = cpu_first_thread_in_core(cpu);
+	for (i = 0; i < threads_per_core; i++) {
+		cpu_clear(cpu, per_cpu(cpu_sibling_map, base + i));
+		cpu_clear(base + i, per_cpu(cpu_sibling_map, cpu));
+		cpu_clear(cpu, per_cpu(cpu_core_map, base +i));
+		cpu_clear(base + i, per_cpu(cpu_core_map, cpu));
+	}
+
+	l2_cache = cpu_to_l2cache(cpu);
+	for_each_present_cpu(i) {
+		struct device_node *np = cpu_to_l2cache(i);
+		if (!np)
+			continue;
+		if (np == l2_cache) {
+			cpu_clear(cpu, per_cpu(cpu_core_map, i));
+			cpu_clear(i, per_cpu(cpu_core_map, cpu));
+		}
+		of_node_put(np);
+	}
+	of_node_put(l2_cache);
+
+
+	return 0;
 }
 
 void __cpu_die(unsigned int cpu)

arch/powerpc/kernel/stacktrace.c

···
 #include <linux/module.h>
 #include <linux/sched.h>
 #include <linux/stacktrace.h>
-#include <linux/module.h>
 #include <asm/ptrace.h>
 #include <asm/processor.h>
 

arch/powerpc/kernel/sysfs.c

···
 
 static DEFINE_PER_CPU(struct cpu, cpu_devices);
 
+static DEFINE_PER_CPU(struct kobject *, cache_toplevel);
+
 /* SMT stuff */
 
 #ifdef CONFIG_PPC_MULTIPLATFORM
···
 #endif /* CONFIG_DEBUG_KERNEL */
 };
 
+struct cache_desc {
+	struct kobject kobj;
+	struct cache_desc *next;
+	const char *type;	/* Instruction, Data, or Unified */
+	u32 size;		/* total cache size in KB */
+	u32 line_size;		/* in bytes */
+	u32 nr_sets;		/* number of sets */
+	u32 level;		/* e.g. 1, 2, 3... */
+	u32 associativity;	/* e.g. 8-way... 0 is fully associative */
+};
 
-static void register_cpu_online(unsigned int cpu)
+DEFINE_PER_CPU(struct cache_desc *, cache_desc);
+
+static struct cache_desc *kobj_to_cache_desc(struct kobject *k)
+{
+	return container_of(k, struct cache_desc, kobj);
+}
+
+static void cache_desc_release(struct kobject *k)
+{
+	struct cache_desc *desc = kobj_to_cache_desc(k);
+
+	pr_debug("%s: releasing %s\n", __func__, kobject_name(k));
+
+	if (desc->next)
+		kobject_put(&desc->next->kobj);
+
+	kfree(kobj_to_cache_desc(k));
+}
+
+static ssize_t cache_desc_show(struct kobject *k, struct attribute *attr, char *buf)
+{
+	struct kobj_attribute *kobj_attr;
+
+	kobj_attr = container_of(attr, struct kobj_attribute, attr);
+
+	return kobj_attr->show(k, kobj_attr, buf);
+}
+
+static struct sysfs_ops cache_desc_sysfs_ops = {
+	.show = cache_desc_show,
+};
+
+static struct kobj_type cache_desc_type = {
+	.release = cache_desc_release,
+	.sysfs_ops = &cache_desc_sysfs_ops,
+};
+
+static ssize_t cache_size_show(struct kobject *k, struct kobj_attribute *attr, char *buf)
+{
+	struct cache_desc *cache = kobj_to_cache_desc(k);
+
+	return sprintf(buf, "%uK\n", cache->size);
+}
+
+static struct kobj_attribute cache_size_attr =
+	__ATTR(size, 0444, cache_size_show, NULL);
+
+static ssize_t cache_line_size_show(struct kobject *k, struct kobj_attribute *attr, char *buf)
+{
+	struct cache_desc *cache = kobj_to_cache_desc(k);
+
+	return sprintf(buf, "%u\n", cache->line_size);
+}
+
+static struct kobj_attribute cache_line_size_attr =
+	__ATTR(coherency_line_size, 0444, cache_line_size_show, NULL);
+
+static ssize_t cache_nr_sets_show(struct kobject *k, struct kobj_attribute *attr, char *buf)
+{
+	struct cache_desc *cache = kobj_to_cache_desc(k);
+
+	return sprintf(buf, "%u\n", cache->nr_sets);
+}
+
+static struct kobj_attribute cache_nr_sets_attr =
+	__ATTR(number_of_sets, 0444, cache_nr_sets_show, NULL);
+
+static ssize_t cache_type_show(struct kobject *k, struct kobj_attribute *attr, char *buf)
+{
+	struct cache_desc *cache = kobj_to_cache_desc(k);
+
+	return sprintf(buf, "%s\n", cache->type);
+}
+
+static struct kobj_attribute cache_type_attr =
+	__ATTR(type, 0444, cache_type_show, NULL);
+
+static ssize_t cache_level_show(struct kobject *k, struct kobj_attribute *attr, char *buf)
+{
+	struct cache_desc *cache = kobj_to_cache_desc(k);
+
+	return sprintf(buf, "%u\n", cache->level);
+}
+
+static struct kobj_attribute cache_level_attr =
+	__ATTR(level, 0444, cache_level_show, NULL);
+
+static ssize_t cache_assoc_show(struct kobject *k, struct kobj_attribute *attr, char *buf)
+{
+	struct cache_desc *cache = kobj_to_cache_desc(k);
+
+	return sprintf(buf, "%u\n", cache->associativity);
+}
+
+static struct kobj_attribute cache_assoc_attr =
+	__ATTR(ways_of_associativity, 0444, cache_assoc_show, NULL);
+
+struct cache_desc_info {
+	const char *type;
+	const char *size_prop;
+	const char *line_size_prop;
+	const char *nr_sets_prop;
+};
+
+/* PowerPC Processor binding says the [di]-cache-* must be equal on
+ * unified caches, so just use d-cache properties. */
+static struct cache_desc_info ucache_info = {
+	.type = "Unified",
+	.size_prop = "d-cache-size",
+	.line_size_prop = "d-cache-line-size",
+	.nr_sets_prop = "d-cache-sets",
+};
+
+static struct cache_desc_info dcache_info = {
+	.type = "Data",
+	.size_prop = "d-cache-size",
+	.line_size_prop = "d-cache-line-size",
+	.nr_sets_prop = "d-cache-sets",
+};
+
+static struct cache_desc_info icache_info = {
+	.type = "Instruction",
+	.size_prop = "i-cache-size",
+	.line_size_prop = "i-cache-line-size",
+	.nr_sets_prop = "i-cache-sets",
+};
+
+static struct cache_desc * __cpuinit create_cache_desc(struct device_node *np, struct kobject *parent, int index, int level, struct cache_desc_info *info)
+{
+	const u32 *cache_line_size;
+	struct cache_desc *new;
+	const u32 *cache_size;
+	const u32 *nr_sets;
+	int rc;
+
+	new = kzalloc(sizeof(*new), GFP_KERNEL);
+	if (!new)
+		return NULL;
+
+	rc = kobject_init_and_add(&new->kobj, &cache_desc_type, parent,
+				  "index%d", index);
+	if (rc)
+		goto err;
+
+	/* type */
+	new->type = info->type;
+	rc = sysfs_create_file(&new->kobj, &cache_type_attr.attr);
+	WARN_ON(rc);
+
+	/* level */
+	new->level = level;
+	rc = sysfs_create_file(&new->kobj, &cache_level_attr.attr);
+	WARN_ON(rc);
+
+	/* size */
+	cache_size = of_get_property(np, info->size_prop, NULL);
+	if (cache_size) {
+		new->size = *cache_size / 1024;
+		rc = sysfs_create_file(&new->kobj,
+				       &cache_size_attr.attr);
+		WARN_ON(rc);
+	}
+
+	/* coherency_line_size */
+	cache_line_size = of_get_property(np, info->line_size_prop, NULL);
+	if (cache_line_size) {
+		new->line_size = *cache_line_size;
+		rc = sysfs_create_file(&new->kobj,
+				       &cache_line_size_attr.attr);
+		WARN_ON(rc);
+	}
+
+	/* number_of_sets */
+	nr_sets = of_get_property(np, info->nr_sets_prop, NULL);
+	if (nr_sets) {
+		new->nr_sets = *nr_sets;
+		rc = sysfs_create_file(&new->kobj,
+				       &cache_nr_sets_attr.attr);
+		WARN_ON(rc);
+	}
+
+	/* ways_of_associativity */
+	if (new->nr_sets == 1) {
+		/* fully associative */
+		new->associativity = 0;
+		goto create_assoc;
+	}
+
+	if (new->nr_sets && new->size && new->line_size) {
+		/* If we have values for all of these we can derive
+		 * the associativity. */
+		new->associativity =
+			((new->size * 1024) / new->nr_sets) / new->line_size;
+create_assoc:
+		rc = sysfs_create_file(&new->kobj,
+				       &cache_assoc_attr.attr);
+		WARN_ON(rc);
+	}
+
+	return new;
+err:
+	kfree(new);
+	return NULL;
+}
+
+static bool cache_is_unified(struct device_node *np)
+{
+	return of_get_property(np, "cache-unified", NULL);
+}
+
+static struct cache_desc * __cpuinit create_cache_index_info(struct device_node *np, struct kobject *parent, int index, int level)
+{
+	const phandle *next_cache_phandle;
+	struct device_node *next_cache;
+	struct cache_desc *new, **end;
+
+	pr_debug("%s(node = %s, index = %d)\n", __func__, np->full_name, index);
+
+	if (cache_is_unified(np)) {
+		new = create_cache_desc(np, parent, index, level,
+					&ucache_info);
+	} else {
+		new = create_cache_desc(np, parent, index, level,
+					&dcache_info);
+		if (new) {
+			index++;
+			new->next = create_cache_desc(np, parent, index, level,
+						      &icache_info);
+		}
+	}
+	if (!new)
+		return NULL;
+
+	end = &new->next;
+	while (*end)
+		end = &(*end)->next;
+
+	next_cache_phandle = of_get_property(np, "l2-cache", NULL);
+	if (!next_cache_phandle)
+		goto out;
+
+	next_cache = of_find_node_by_phandle(*next_cache_phandle);
+	if (!next_cache)
+		goto out;
+
+	*end = create_cache_index_info(next_cache, parent, ++index, ++level);
+
+	of_node_put(next_cache);
+out:
+	return new;
+}
+
+static void __cpuinit create_cache_info(struct sys_device *sysdev)
+{
+	struct kobject *cache_toplevel;
+	struct device_node *np = NULL;
+	int cpu = sysdev->id;
+
+	cache_toplevel = kobject_create_and_add("cache", &sysdev->kobj);
+	if (!cache_toplevel)
+		return;
+	per_cpu(cache_toplevel, cpu) = cache_toplevel;
+	np = of_get_cpu_node(cpu, NULL);
+	if (np != NULL) {
+		per_cpu(cache_desc, cpu) =
+			create_cache_index_info(np, cache_toplevel, 0, 1);
+		of_node_put(np);
+	}
+	return;
+}
+
+static void __cpuinit register_cpu_online(unsigned int cpu)
 {
 	struct cpu *c = &per_cpu(cpu_devices, cpu);
 	struct sys_device *s = &c->sysdev;
···
 
 	if (cpu_has_feature(CPU_FTR_DSCR))
 		sysdev_create_file(s, &attr_dscr);
+
+	create_cache_info(s);
 }
 
 #ifdef CONFIG_HOTPLUG_CPU
+static void remove_cache_info(struct sys_device *sysdev)
+{
+	struct kobject *cache_toplevel;
+	struct cache_desc *cache_desc;
+	int cpu = sysdev->id;
+
+	cache_desc = per_cpu(cache_desc, cpu);
+	if (cache_desc != NULL) {
+		sysfs_remove_file(&cache_desc->kobj, &cache_size_attr.attr);
+		sysfs_remove_file(&cache_desc->kobj, &cache_line_size_attr.attr);
+		sysfs_remove_file(&cache_desc->kobj, &cache_type_attr.attr);
+		sysfs_remove_file(&cache_desc->kobj, &cache_level_attr.attr);
+		sysfs_remove_file(&cache_desc->kobj, &cache_nr_sets_attr.attr);
+		sysfs_remove_file(&cache_desc->kobj, &cache_assoc_attr.attr);
+
+		kobject_put(&cache_desc->kobj);
+	}
+	cache_toplevel = per_cpu(cache_toplevel, cpu);
+	if (cache_toplevel != NULL)
+		kobject_put(cache_toplevel);
+}
+
 static void unregister_cpu_online(unsigned int cpu)
 {
 	struct cpu *c = &per_cpu(cpu_devices, cpu);
···
 
 	if (cpu_has_feature(CPU_FTR_DSCR))
 		sysdev_remove_file(s, &attr_dscr);
+
+	remove_cache_info(s);
 }
 #endif /* CONFIG_HOTPLUG_CPU */
 

arch/powerpc/kernel/vio.c

···
 	}
 
 	ret = dma_iommu_ops.map_single(dev, vaddr, size, direction, attrs);
-	if (unlikely(dma_mapping_error(ret))) {
+	if (unlikely(dma_mapping_error(dev, ret))) {
 		vio_cmo_dealloc(viodev, roundup(size, IOMMU_PAGE_SIZE));
 		atomic_inc(&viodev->cmo.allocs_failed);
 	}
···
 static int vio_cmo_bus_probe(struct vio_dev *viodev) { return 0; }
 static void vio_cmo_bus_remove(struct vio_dev *viodev) {}
 static void vio_cmo_set_dma_ops(struct vio_dev *viodev) {}
-static void vio_cmo_bus_init() {}
-static void vio_cmo_sysfs_init() { }
+static void vio_cmo_bus_init(void) {}
+static void vio_cmo_sysfs_init(void) { }
 #endif /* CONFIG_PPC_SMLPAR */
 EXPORT_SYMBOL(vio_cmo_entitlement_update);
 EXPORT_SYMBOL(vio_cmo_set_dev_desired);

arch/powerpc/mm/hugetlbpage.c

···
 
 	if (!cpu_has_feature(CPU_FTR_16M_PAGE))
 		return -ENODEV;
+
 	/* Add supported huge page sizes.  Need to change HUGE_MAX_HSTATE
 	 * and adjust PTE_NONCACHE_NUM if the number of supported huge page
 	 * sizes changes.
 	 */
 	set_huge_psize(MMU_PAGE_16M);
-	set_huge_psize(MMU_PAGE_64K);
 	set_huge_psize(MMU_PAGE_16G);
+
+	/* Temporarily disable support for 64K huge pages when 64K SPU local
+	 * store support is enabled as the current implementation conflicts.
+	 */
+#ifndef CONFIG_SPU_FS_64K_LS
+	set_huge_psize(MMU_PAGE_64K);
+#endif
 
 	for (psize = 0; psize < MMU_PAGE_COUNT; ++psize) {
 		if (mmu_huge_psizes[psize]) {

arch/powerpc/platforms/powermac/setup.c

···
 }
 machine_device_initcall(powermac, pmac_declare_of_platform_devices);
 
+#ifdef CONFIG_SERIAL_PMACZILOG_CONSOLE
+/*
+ * This is called very early, as part of console_init() (typically just after
+ * time_init()). This function is respondible for trying to find a good
+ * default console on serial ports. It tries to match the open firmware
+ * default output with one of the available serial console drivers.
+ */
+static int __init check_pmac_serial_console(void)
+{
+	struct device_node *prom_stdout = NULL;
+	int offset = 0;
+	const char *name;
+#ifdef CONFIG_SERIAL_PMACZILOG_TTYS
+	char *devname = "ttyS";
+#else
+	char *devname = "ttyPZ";
+#endif
+
+	pr_debug(" -> check_pmac_serial_console()\n");
+
+	/* The user has requested a console so this is already set up. */
+	if (strstr(boot_command_line, "console=")) {
+		pr_debug(" console was specified !\n");
+		return -EBUSY;
+	}
+
+	if (!of_chosen) {
+		pr_debug(" of_chosen is NULL !\n");
+		return -ENODEV;
+	}
+
+	/* We are getting a weird phandle from OF ... */
+	/* ... So use the full path instead */
+	name = of_get_property(of_chosen, "linux,stdout-path", NULL);
+	if (name == NULL) {
+		pr_debug(" no linux,stdout-path !\n");
+		return -ENODEV;
+	}
+	prom_stdout = of_find_node_by_path(name);
+	if (!prom_stdout) {
+		pr_debug(" can't find stdout package %s !\n", name);
+		return -ENODEV;
+	}
+	pr_debug("stdout is %s\n", prom_stdout->full_name);
+
+	name = of_get_property(prom_stdout, "name", NULL);
+	if (!name) {
+		pr_debug(" stdout package has no name !\n");
+		goto not_found;
+	}
+
+	if (strcmp(name, "ch-a") == 0)
+		offset = 0;
+	else if (strcmp(name, "ch-b") == 0)
+		offset = 1;
+	else
+		goto not_found;
+	of_node_put(prom_stdout);
+
+	pr_debug("Found serial console at %s%d\n", devname, offset);
+
+	return add_preferred_console(devname, offset, NULL);
+
+ not_found:
+	pr_debug("No preferred console found !\n");
+	of_node_put(prom_stdout);
+	return -ENODEV;
+}
+console_initcall(check_pmac_serial_console);
+
+#endif /* CONFIG_SERIAL_PMACZILOG_CONSOLE */
+
 /*
  * Called very early, MMU is off, device-tree isn't unflattened
  */

arch/powerpc/platforms/powermac/udbg_scc.c

···
 	out_8(sccc, 0xc0);
 
 	/* If SCC was the OF output port, read the BRG value, else
-	 * Setup for 57600 8N1
+	 * Setup for 38400 or 57600 8N1 depending on the machine
 	 */
 	if (ch_def != NULL) {
 		out_8(sccc, 13);
 		scc_inittab[1] = in_8(sccc);
 		out_8(sccc, 12);
 		scc_inittab[3] = in_8(sccc);
+	} else if (machine_is_compatible("RackMac1,1")
+		   || machine_is_compatible("RackMac1,2")
+		   || machine_is_compatible("MacRISC4")) {
+		/* Xserves and G5s default to 57600 */
+		scc_inittab[1] = 0;
+		scc_inittab[3] = 0;
+	} else {
+		/* Others default to 38400 */
+		scc_inittab[1] = 0;
+		scc_inittab[3] = 1;
 	}
 
 	for (i = 0; i < sizeof(scc_inittab); ++i)

arch/powerpc/platforms/pseries/cmm.c

···
 }
 
 #define CMM_SHOW(name, format, args...)			\
-	static ssize_t show_##name(struct sys_device *dev, char *buf)	\
+	static ssize_t show_##name(struct sys_device *dev,	\
+				   struct sysdev_attribute *attr,	\
+				   char *buf)			\
 	{							\
 		return sprintf(buf, format, ##args);		\
 	}							\
···
 CMM_SHOW(loaned_kb, "%lu\n", PAGES2KB(loaned_pages));
 CMM_SHOW(loaned_target_kb, "%lu\n", PAGES2KB(loaned_pages_target));
 
-static ssize_t show_oom_pages(struct sys_device *dev, char *buf)
+static ssize_t show_oom_pages(struct sys_device *dev,
+			      struct sysdev_attribute *attr, char *buf)
 {
 	return sprintf(buf, "%lu\n", PAGES2KB(oom_freed_pages));
 }
 
 static ssize_t store_oom_pages(struct sys_device *dev,
+			       struct sysdev_attribute *attr,
 			       const char *buf, size_t count)
 {
 	unsigned long val = simple_strtoul (buf, NULL, 10);

drivers/net/ibmveth.c

···
 		dma_addr = dma_map_single(&adapter->vdev->dev, skb->data,
 				pool->buff_size, DMA_FROM_DEVICE);
 
-		if (dma_mapping_error((&adapter->vdev->dev, dma_addr))
+		if (dma_mapping_error(&adapter->vdev->dev, dma_addr))
 			goto failure;
 
 		pool->free_map[free_index] = IBM_VETH_INVALID_MAP;
···
 		pool->consumer_index = pool->size - 1;
 	else
 		pool->consumer_index--;
-	if (!dma_mapping_error((&adapter->vdev->dev, dma_addr))
+	if (!dma_mapping_error(&adapter->vdev->dev, dma_addr))
 		dma_unmap_single(&adapter->vdev->dev,
 		                 pool->dma_addr[index], pool->buff_size,
 		                 DMA_FROM_DEVICE);
···
 						 &adapter->rx_buff_pool[i]);
 
 	if (adapter->bounce_buffer != NULL) {
-		if (!dma_mapping_error(adapter->bounce_buffer_dma)) {
+		if (!dma_mapping_error(dev, adapter->bounce_buffer_dma)) {
 			dma_unmap_single(&adapter->vdev->dev,
 					adapter->bounce_buffer_dma,
 					adapter->netdev->mtu + IBMVETH_BUFF_OH,
···
 		buf[1] = 0;
 	}
 
-	if (dma_mapping_error((&adapter->vdev->dev, data_dma_addr)) {
+	if (dma_mapping_error(&adapter->vdev->dev, data_dma_addr)) {
 		if (!firmware_has_feature(FW_FEATURE_CMO))
 			ibmveth_error_printk("tx: unable to map xmit buffer\n");
 		skb_copy_from_linear_data(skb, adapter->bounce_buffer,

drivers/of/Kconfig

···
 	depends on PPC_OF && I2C
 	help
 	  OpenFirmware I2C accessors
+
+config OF_SPI
+	def_tristate SPI
+	depends on OF && PPC_OF && SPI
+	help
+	  OpenFirmware SPI accessors

drivers/of/Makefile

···
 obj-$(CONFIG_OF_DEVICE) += device.o platform.o
 obj-$(CONFIG_OF_GPIO)   += gpio.o
 obj-$(CONFIG_OF_I2C)	+= of_i2c.o
+obj-$(CONFIG_OF_SPI)	+= of_spi.o

drivers/of/base.c

···
 	return np;
 }
 EXPORT_SYMBOL(of_find_matching_node);
+
+/**
+ * of_modalias_table: Table of explicit compatible ==> modalias mappings
+ *
+ * This table allows particulare compatible property values to be mapped
+ * to modalias strings.  This is useful for busses which do not directly
+ * understand the OF device tree but are populated based on data contained
+ * within the device tree.  SPI and I2C are the two current users of this
+ * table.
+ *
+ * In most cases, devices do not need to be listed in this table because
+ * the modalias value can be derived directly from the compatible table.
+ * However, if for any reason a value cannot be derived, then this table
+ * provides a method to override the implicit derivation.
+ *
+ * At the moment, a single table is used for all bus types because it is
+ * assumed that the data size is small and that the compatible values
+ * should already be distinct enough to differentiate between SPI, I2C
+ * and other devices.
+ */
+struct of_modalias_table {
+	char *of_device;
+	char *modalias;
+};
+static struct of_modalias_table of_modalias_table[] = {
+	/* Empty for now; add entries as needed */
+};
+
+/**
+ * of_modalias_node - Lookup appropriate modalias for a device node
+ * @node:	pointer to a device tree node
+ * @modalias:	Pointer to buffer that modalias value will be copied into
+ * @len:	Length of modalias value
+ *
+ * Based on the value of the compatible property, this routine will determine
+ * an appropriate modalias value for a particular device tree node.  Three
+ * separate methods are used to derive a modalias value.
+ *
+ * First method is to lookup the compatible value in of_modalias_table.
+ * Second is to look for a "linux,<modalias>" entry in the compatible list
+ * and used that for modalias.  Third is to strip off the manufacturer
+ * prefix from the first compatible entry and use the remainder as modalias
+ *
+ * This routine returns 0 on success
+ */
+int of_modalias_node(struct device_node *node, char *modalias, int len)
+{
+	int i, cplen;
+	const char *compatible;
+	const char *p;
+
+	/* 1. search for exception list entry */
+	for (i = 0; i < ARRAY_SIZE(of_modalias_table); i++) {
+		compatible = of_modalias_table[i].of_device;
+		if (!of_device_is_compatible(node, compatible))
+			continue;
+		strlcpy(modalias, of_modalias_table[i].modalias, len);
+		return 0;
+	}
+
+	compatible = of_get_property(node, "compatible", &cplen);
+	if (!compatible)
+		return -ENODEV;
+
+	/* 2. search for linux,<modalias> entry */
+	p = compatible;
+	while (cplen > 0) {
+		if (!strncmp(p, "linux,", 6)) {
+			p += 6;
+			strlcpy(modalias, p, len);
+			return 0;
+		}
+
+		i = strlen(p) + 1;
+		p += i;
+		cplen -= i;
+	}
+
+	/* 3. take first compatible entry and strip manufacturer */
+	p = strchr(compatible, ',');
+	if (!p)
+		return -ENODEV;
+	p++;
+	strlcpy(modalias, p, len);
+	return 0;
+}
+EXPORT_SYMBOL_GPL(of_modalias_node);
+

drivers/of/of_i2c.c

···
 #include <linux/of_i2c.h>
 #include <linux/module.h>
 
-struct i2c_driver_device {
-	char    *of_device;
-	char    *i2c_type;
-};
-
-static struct i2c_driver_device i2c_devices[] = {
-};
-
-static int of_find_i2c_driver(struct device_node *node,
-			      struct i2c_board_info *info)
-{
-	int i, cplen;
-	const char *compatible;
-	const char *p;
-
-	/* 1. search for exception list entry */
-	for (i = 0; i < ARRAY_SIZE(i2c_devices); i++) {
-		if (!of_device_is_compatible(node, i2c_devices[i].of_device))
-			continue;
-		if (strlcpy(info->type, i2c_devices[i].i2c_type,
-			    I2C_NAME_SIZE) >= I2C_NAME_SIZE)
-			return -ENOMEM;
-
-		return 0;
-	}
-
-	compatible = of_get_property(node, "compatible", &cplen);
-	if (!compatible)
-		return -ENODEV;
-
-	/* 2. search for linux,<i2c-type> entry */
-	p = compatible;
-	while (cplen > 0) {
-		if (!strncmp(p, "linux,", 6)) {
-			p += 6;
-			if (strlcpy(info->type, p,
-				    I2C_NAME_SIZE) >= I2C_NAME_SIZE)
-				return -ENOMEM;
-			return 0;
-		}
-
-		i = strlen(p) + 1;
-		p += i;
-		cplen -= i;
-	}
-
-	/* 3. take fist compatible entry and strip manufacturer */
-	p = strchr(compatible, ',');
-	if (!p)
-		return -ENODEV;
-	p++;
-	if (strlcpy(info->type, p, I2C_NAME_SIZE) >= I2C_NAME_SIZE)
-		return -ENOMEM;
-	return 0;
-}
-
 void of_register_i2c_devices(struct i2c_adapter *adap,
 			     struct device_node *adap_node)
 {
···
 		const u32 *addr;
 		int len;
 
+		if (of_modalias_node(node, info.type, sizeof(info.type)) < 0)
+			continue;
+
 		addr = of_get_property(node, "reg", &len);
 		if (!addr || len < sizeof(int) || *addr > (1 << 10) - 1) {
 			printk(KERN_ERR
···
 		}
 
 		info.irq = irq_of_parse_and_map(node, 0);
-
-		if (of_find_i2c_driver(node, &info) < 0) {
-			irq_dispose_mapping(info.irq);
-			continue;
-		}
 
 		info.addr = *addr;
 

drivers/of/of_spi.c

···
+/*
+ * SPI OF support routines
+ * Copyright (C) 2008 Secret Lab Technologies Ltd.
+ *
+ * Support routines for deriving SPI device attachments from the device
+ * tree.
+ */
+
+#include <linux/of.h>
+#include <linux/device.h>
+#include <linux/spi/spi.h>
+#include <linux/of_spi.h>
+
+/**
+ * of_register_spi_devices - Register child devices onto the SPI bus
+ * @master:	Pointer to spi_master device
+ * @np:		parent node of SPI device nodes
+ *
+ * Registers an spi_device for each child node of 'np' which has a 'reg'
+ * property.
+ */
+void of_register_spi_devices(struct spi_master *master, struct device_node *np)
+{
+	struct spi_device *spi;
+	struct device_node *nc;
+	const u32 *prop;
+	int rc;
+	int len;
+
+	for_each_child_of_node(np, nc) {
+		/* Alloc an spi_device */
+		spi = spi_alloc_device(master);
+		if (!spi) {
+			dev_err(&master->dev, "spi_device alloc error for %s\n",
+				nc->full_name);
+			spi_dev_put(spi);
+			continue;
+		}
+
+		/* Select device driver */
+		if (of_modalias_node(nc, spi->modalias,
+				     sizeof(spi->modalias)) < 0) {
+			dev_err(&master->dev, "cannot find modalias for %s\n",
+				nc->full_name);
+			spi_dev_put(spi);
+			continue;
+		}
+
+		/* Device address */
+		prop = of_get_property(nc, "reg", &len);
+		if (!prop || len < sizeof(*prop)) {
+			dev_err(&master->dev, "%s has no 'reg' property\n",
+				nc->full_name);
+			spi_dev_put(spi);
+			continue;
+		}
+		spi->chip_select = *prop;
+
+		/* Mode (clock phase/polarity/etc.) */
+		if (of_find_property(nc, "spi-cpha", NULL))
+			spi->mode |= SPI_CPHA;
+		if (of_find_property(nc, "spi-cpol", NULL))
+			spi->mode |= SPI_CPOL;
+
+		/* Device speed */
+		prop = of_get_property(nc, "spi-max-frequency", &len);
+		if (!prop || len < sizeof(*prop)) {
+			dev_err(&master->dev, "%s has no 'spi-max-frequency' property\n",
+				nc->full_name);
+			spi_dev_put(spi);
+			continue;
+		}
+		spi->max_speed_hz = *prop;
+
+		/* IRQ */
+		spi->irq = irq_of_parse_and_map(nc, 0);
+
+		/* Store a pointer to the node in the device structure */
+		of_node_get(nc);
+		spi->dev.archdata.of_node = nc;
+
+		/* Register the new device */
+		request_module(spi->modalias);
+		rc = spi_add_device(spi);
+		if (rc) {
+			dev_err(&master->dev, "spi_device register error %s\n",
+				nc->full_name);
+			spi_dev_put(spi);
+		}
+
+	}
+}
+EXPORT_SYMBOL(of_register_spi_devices);

drivers/spi/spi.c

···
 static LIST_HEAD(board_list);
 static DEFINE_MUTEX(board_lock);
 
+/**
+ * spi_alloc_device - Allocate a new SPI device
+ * @master: Controller to which device is connected
+ * Context: can sleep
+ *
+ * Allows a driver to allocate and initialize a spi_device without
+ * registering it immediately.  This allows a driver to directly
+ * fill the spi_device with device parameters before calling
+ * spi_add_device() on it.
+ *
+ * Caller is responsible to call spi_add_device() on the returned
+ * spi_device structure to add it to the SPI master.  If the caller
+ * needs to discard the spi_device without adding it, then it should
+ * call spi_dev_put() on it.
+ *
+ * Returns a pointer to the new device, or NULL.
+ */
+struct spi_device *spi_alloc_device(struct spi_master *master)
+{
+	struct spi_device	*spi;
+	struct device		*dev = master->dev.parent;
+
+	if (!spi_master_get(master))
+		return NULL;
+
+	spi = kzalloc(sizeof *spi, GFP_KERNEL);
+	if (!spi) {
+		dev_err(dev, "cannot alloc spi_device\n");
+		spi_master_put(master);
+		return NULL;
+	}
+
+	spi->master = master;
+	spi->dev.parent = dev;
+	spi->dev.bus = &spi_bus_type;
+	spi->dev.release = spidev_release;
+	device_initialize(&spi->dev);
+	return spi;
+}
+EXPORT_SYMBOL_GPL(spi_alloc_device);
+
+/**
+ * spi_add_device - Add spi_device allocated with spi_alloc_device
+ * @spi: spi_device to register
+ *
+ * Companion function to spi_alloc_device.  Devices allocated with
+ * spi_alloc_device can be added onto the spi bus with this function.
+ *
+ * Returns 0 on success; non-zero on failure
+ */
+int spi_add_device(struct spi_device *spi)
+{
+	struct device *dev = spi->master->dev.parent;
+	int status;
+
+	/* Chipselects are numbered 0..max; validate. */
+	if (spi->chip_select >= spi->master->num_chipselect) {
+		dev_err(dev, "cs%d >= max %d\n",
+			spi->chip_select,
+			spi->master->num_chipselect);
+		return -EINVAL;
+	}
+
+	/* Set the bus ID string */
+	snprintf(spi->dev.bus_id, sizeof spi->dev.bus_id,
+			"%s.%u", spi->master->dev.bus_id,
+			spi->chip_select);
+
+	/* drivers may modify this initial i/o setup */
+	status = spi->master->setup(spi);
+	if (status < 0) {
+		dev_err(dev, "can't %s %s, status %d\n",
+				"setup", spi->dev.bus_id, status);
+		return status;
+	}
+
+	/* driver core catches callers that misbehave by defining
+	 * devices that already exist.
+	 */
+	status = device_add(&spi->dev);
+	if (status < 0) {
+		dev_err(dev, "can't %s %s, status %d\n",
+				"add", spi->dev.bus_id, status);
+		return status;
+	}
+
+	dev_dbg(dev, "registered child %s\n", spi->dev.bus_id);
+	return 0;
+}
+EXPORT_SYMBOL_GPL(spi_add_device);
 
 /**
  * spi_new_device - instantiate one new SPI device
···
 				  struct spi_board_info *chip)
 {
 	struct spi_device	*proxy;
-	struct device		*dev = master->dev.parent;
 	int			status;
 
 	/* NOTE:  caller did any chip->bus_num checks necessary.
···
 	 * suggests syslogged diagnostics are best here (ugh).
 	 */
 
-	/* Chipselects are numbered 0..max; validate. */
-	if (chip->chip_select >= master->num_chipselect) {
-		dev_err(dev, "cs%d > max %d\n",
-			chip->chip_select,
-			master->num_chipselect);
-		return NULL;
-	}
-
-	if (!spi_master_get(master))
+	proxy = spi_alloc_device(master);
+	if (!proxy)
 		return NULL;
 
 	WARN_ON(strlen(chip->modalias) >= sizeof(proxy->modalias));
 
-	proxy = kzalloc(sizeof *proxy, GFP_KERNEL);
-	if (!proxy) {
-		dev_err(dev, "can't alloc dev for cs%d\n",
-			chip->chip_select);
-		goto fail;
-	}
-	proxy->master = master;
 	proxy->chip_select = chip->chip_select;
 	proxy->max_speed_hz = chip->max_speed_hz;
 	proxy->mode = chip->mode;
 	proxy->irq = chip->irq;
 	strlcpy(proxy->modalias, chip->modalias, sizeof(proxy->modalias));
-
-	snprintf(proxy->dev.bus_id, sizeof proxy->dev.bus_id,
-			"%s.%u", master->dev.bus_id,
-			chip->chip_select);
-	proxy->dev.parent = dev;
-	proxy->dev.bus = &spi_bus_type;
 	proxy->dev.platform_data = (void *) chip->platform_data;
 	proxy->controller_data = chip->controller_data;
 	proxy->controller_state = NULL;
-	proxy->dev.release = spidev_release;
 
-	/* drivers may modify this initial i/o setup */
-	status = master->setup(proxy);
+	status = spi_add_device(proxy);
 	if (status < 0) {
-		dev_err(dev, "can't %s %s, status %d\n",
-				"setup", proxy->dev.bus_id, status);
-		goto fail;
+		spi_dev_put(proxy);
+		return NULL;
 	}
 
-	/* driver core catches callers that misbehave by defining
-	 * devices that already exist.
-	 */
-	status = device_register(&proxy->dev);
-	if (status < 0) {
-		dev_err(dev, "can't %s %s, status %d\n",
-				"add", proxy->dev.bus_id, status);
-		goto fail;
-	}
-	dev_dbg(dev, "registered child %s\n", proxy->dev.bus_id);
 	return proxy;
-
-fail:
-	spi_master_put(master);
-	kfree(proxy);
-	return NULL;
 }
 EXPORT_SYMBOL_GPL(spi_new_device);
 

include/asm-powerpc/pgtable-4k.h

···
 #define _PAGE_GROUP_IX  0x7000 /* software: HPTE index within group */
 #define _PAGE_F_SECOND  _PAGE_SECONDARY
 #define _PAGE_F_GIX     _PAGE_GROUP_IX
+#define _PAGE_SPECIAL	0x10000 /* software: special page */
+#define __HAVE_ARCH_PTE_SPECIAL
 
 /* PTE flags to conserve for HPTE identification */
 #define _PAGE_HPTEFLAGS (_PAGE_BUSY | _PAGE_HASHPTE | \

include/asm-powerpc/pgtable-64k.h

···
 #define PGDIR_MASK	(~(PGDIR_SIZE-1))
 
 /* Additional PTE bits (don't change without checking asm in hash_low.S) */
+#define __HAVE_ARCH_PTE_SPECIAL
+#define _PAGE_SPECIAL	0x00000400 /* software: special page */
 #define _PAGE_HPTE_SUB	0x0ffff000 /* combo only: sub pages HPTE bits */
 #define _PAGE_HPTE_SUB0	0x08000000 /* combo only: first sub page */
 #define _PAGE_COMBO	0x10000000 /* this is a combo 4k page */

include/asm-powerpc/pgtable-ppc32.h

···
 #ifndef _PAGE_COHERENT
 #define _PAGE_COHERENT	0
 #endif
+#ifndef _PAGE_WRITETHRU
+#define _PAGE_WRITETHRU	0
+#endif
 #ifndef _PMD_PRESENT_MASK
 #define _PMD_PRESENT_MASK	_PMD_PRESENT
 #endif

include/asm-powerpc/pgtable-ppc64.h

···
 static inline int pte_dirty(pte_t pte) { return pte_val(pte) & _PAGE_DIRTY;}
 static inline int pte_young(pte_t pte) { return pte_val(pte) & _PAGE_ACCESSED;}
 static inline int pte_file(pte_t pte) { return pte_val(pte) & _PAGE_FILE;}
-static inline int pte_special(pte_t pte) { return 0; }
+static inline int pte_special(pte_t pte) { return pte_val(pte) & _PAGE_SPECIAL; }
 
 static inline void pte_uncache(pte_t pte) { pte_val(pte) |= _PAGE_NO_CACHE; }
 static inline void pte_cache(pte_t pte)   { pte_val(pte) &= ~_PAGE_NO_CACHE; }
···
 static inline pte_t pte_mkhuge(pte_t pte) {
 	return pte; }
 static inline pte_t pte_mkspecial(pte_t pte) {
-	return pte; }
+	pte_val(pte) |= _PAGE_SPECIAL; return pte; }
 static inline unsigned long pte_pgprot(pte_t pte)
 {
 	return __pgprot(pte_val(pte)) & PAGE_PROT_BITS;

include/asm-powerpc/ptrace.h

···
 #ifndef __ASSEMBLY__
 
 #define instruction_pointer(regs) ((regs)->nip)
+#define user_stack_pointer(regs) ((regs)->gpr[1])
 #define regs_return_value(regs) ((regs)->gpr[3])
 
 #ifdef CONFIG_SMP

include/asm-powerpc/signal.h

···
 
 #ifdef __KERNEL__
 struct pt_regs;
-extern int do_signal(sigset_t *oldset, struct pt_regs *regs);
-extern int do_signal32(sigset_t *oldset, struct pt_regs *regs);
+extern void do_signal(struct pt_regs *regs, unsigned long thread_info_flags);
 #define ptrace_signal_deliver(regs, cookie) do { } while (0)
 #endif /* __KERNEL__ */
 

include/asm-powerpc/smp.h

···
 #endif
 
 DECLARE_PER_CPU(cpumask_t, cpu_sibling_map);
+DECLARE_PER_CPU(cpumask_t, cpu_core_map);
+extern int cpu_to_core_id(int cpu);
 
 /* Since OpenPIC has only 4 IPIs, we use slightly different message numbers.
  *

include/asm-powerpc/syscall.h

···
+/*
+ * Access to user system call parameters and results
+ *
+ * Copyright (C) 2008 Red Hat, Inc.  All rights reserved.
+ *
+ * This copyrighted material is made available to anyone wishing to use,
+ * modify, copy, or redistribute it subject to the terms and conditions
+ * of the GNU General Public License v.2.
+ *
+ * See asm-generic/syscall.h for descriptions of what we must do here.
+ */
+
+#ifndef _ASM_SYSCALL_H
+#define _ASM_SYSCALL_H	1
+
+#include <linux/sched.h>
+
+static inline long syscall_get_nr(struct task_struct *task,
+				  struct pt_regs *regs)
+{
+	return TRAP(regs) == 0xc00 ? regs->gpr[0] : -1L;
+}
+
+static inline void syscall_rollback(struct task_struct *task,
+				    struct pt_regs *regs)
+{
+	regs->gpr[3] = regs->orig_gpr3;
+}
+
+static inline long syscall_get_error(struct task_struct *task,
+				     struct pt_regs *regs)
+{
+	return (regs->ccr & 0x1000) ? -regs->gpr[3] : 0;
+}
+
+static inline long syscall_get_return_value(struct task_struct *task,
+					    struct pt_regs *regs)
+{
+	return regs->gpr[3];
+}
+
+static inline void syscall_set_return_value(struct task_struct *task,
+					    struct pt_regs *regs,
+					    int error, long val)
+{
+	if (error) {
+		regs->ccr |= 0x1000L;
+		regs->gpr[3] = -error;
+	} else {
+		regs->ccr &= ~0x1000L;
+		regs->gpr[3] = val;
+	}
+}
+
+static inline void syscall_get_arguments(struct task_struct *task,
+					 struct pt_regs *regs,
+					 unsigned int i, unsigned int n,
+					 unsigned long *args)
+{
+	BUG_ON(i + n > 6);
+#ifdef CONFIG_PPC64
+	if (test_tsk_thread_flag(task, TIF_32BIT)) {
+		/*
+		 * Zero-extend 32-bit argument values.  The high bits are
+		 * garbage ignored by the actual syscall dispatch.
+		 */
+		while (n-- > 0)
+			args[n] = (u32) regs->gpr[3 + i + n];
+		return;
+	}
+#endif
+	memcpy(args, &regs->gpr[3 + i], n * sizeof(args[0]));
+}
+
+static inline void syscall_set_arguments(struct task_struct *task,
+					 struct pt_regs *regs,
+					 unsigned int i, unsigned int n,
+					 const unsigned long *args)
+{
+	BUG_ON(i + n > 6);
+	memcpy(&regs->gpr[3 + i], args, n * sizeof(args[0]));
+}
+
+#endif	/* _ASM_SYSCALL_H */

include/asm-powerpc/thread_info.h

···
 #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_NOTIFY_RESUME	13	/* callback before returning to user */
 #define TIF_FREEZE		14	/* Freezing for suspend */
 #define TIF_RUNLATCH		15	/* Is the runlatch enabled? */
 #define TIF_ABI_PENDING		16	/* 32/64 bit switch needed */
···
 #define _TIF_SECCOMP		(1<<TIF_SECCOMP)
 #define _TIF_RESTOREALL		(1<<TIF_RESTOREALL)
 #define _TIF_NOERROR		(1<<TIF_NOERROR)
+#define _TIF_NOTIFY_RESUME	(1<<TIF_NOTIFY_RESUME)
 #define _TIF_FREEZE		(1<<TIF_FREEZE)
 #define _TIF_RUNLATCH		(1<<TIF_RUNLATCH)
 #define _TIF_ABI_PENDING	(1<<TIF_ABI_PENDING)
 #define _TIF_SYSCALL_T_OR_A	(_TIF_SYSCALL_TRACE|_TIF_SYSCALL_AUDIT|_TIF_SECCOMP)
 
-#define _TIF_USER_WORK_MASK	(_TIF_SIGPENDING | _TIF_NEED_RESCHED)
+#define _TIF_USER_WORK_MASK	(_TIF_SIGPENDING | _TIF_NEED_RESCHED | \
+				 _TIF_NOTIFY_RESUME)
 #define _TIF_PERSYSCALL_MASK	(_TIF_RESTOREALL|_TIF_NOERROR)
 
 /* Bits in local_flags */

include/asm-powerpc/topology.h

···
 #include <asm/smp.h>
 
 #define topology_thread_siblings(cpu)	(per_cpu(cpu_sibling_map, cpu))
+#define topology_core_siblings(cpu)	(per_cpu(cpu_core_map, cpu))
+#define topology_core_id(cpu)		(cpu_to_core_id(cpu))
 #endif
 #endif
 

include/linux/of.h

···
 extern int of_n_size_cells(struct device_node *np);
 extern const struct of_device_id *of_match_node(
 	const struct of_device_id *matches, const struct device_node *node);
+extern int of_modalias_node(struct device_node *node, char *modalias, int len);
 
 #endif /* _LINUX_OF_H */

include/linux/of_spi.h

···
+/*
+ * OpenFirmware SPI support routines
+ * Copyright (C) 2008 Secret Lab Technologies Ltd.
+ *
+ * Support routines for deriving SPI device attachments from the device
+ * tree.
+ */
+
+#ifndef __LINUX_OF_SPI_H
+#define __LINUX_OF_SPI_H
+
+#include <linux/of.h>
+#include <linux/spi/spi.h>
+
+extern void of_register_spi_devices(struct spi_master *master,
+				    struct device_node *np);
+
+#endif /* __LINUX_OF_SPI */

include/linux/spi/spi.h

···
  * use spi_new_device() to describe each device.  You can also call
  * spi_unregister_device() to start making that device vanish, but
  * normally that would be handled by spi_unregister_master().
+ *
+ * You can also use spi_alloc_device() and spi_add_device() to use a two
+ * stage registration sequence for each spi_device.  This gives the caller
+ * some more control over the spi_device structure before it is registered,
+ * but requires that caller to initialize fields that would otherwise
+ * be defined using the board info.
  */
+extern struct spi_device *
+spi_alloc_device(struct spi_master *master);
+
+extern int
+spi_add_device(struct spi_device *spi);
+
 extern struct spi_device *
 spi_new_device(struct spi_master *, struct spi_board_info *);