Merge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux

Pull arm64 fixes from Will Deacon:
"I'm safely chained back up to my desk, so please pull these arm64
fixes for -rc1 that address some issues that cropped up during the
merge window:

- Prevent KASLR from mapping the top page of the virtual address
space

- Fix device-tree probing of SDEI driver

- Fix incorrect register offset definition in Hisilicon DDRC PMU
driver

- Fix compilation issue with older binutils not liking unsigned
immediates

- Fix uapi headers so that libc can provide its own sigcontext
definition

- Fix handling of private compat syscalls

- Hook up compat io_pgetevents() syscall for 32-bit tasks

- Cleanup to arm64 Makefile (including now to avoid silly conflicts)"

* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
arm64: compat: Hook up io_pgetevents() for 32-bit tasks
arm64: compat: Don't pull syscall number from regs in arm_compat_syscall
arm64: compat: Avoid sending SIGILL for unallocated syscall numbers
arm64/sve: Disentangle <uapi/asm/ptrace.h> from <uapi/asm/sigcontext.h>
arm64/sve: ptrace: Fix SVE_PT_REGS_OFFSET definition
drivers/perf: hisi: Fixup one DDRC PMU register offset
arm64: replace arm64-obj-* in Makefile with obj-*
arm64: kaslr: Reserve size of ARM64_MEMSTART_ALIGN in linear region
firmware: arm_sdei: Fix DT platform device creation
firmware: arm_sdei: fix wrong of_node_put() in init function
arm64: entry: remove unused register aliases
arm64: smp: Fix compilation error

arch/arm64/include/asm/smp.h

···
 #ifndef __ASM_SMP_H
 #define __ASM_SMP_H
 
+#include <linux/const.h>
+
 /* Values for secondary_data.status */
 #define CPU_STUCK_REASON_SHIFT		(8)
-#define CPU_BOOT_STATUS_MASK		((1U << CPU_STUCK_REASON_SHIFT) - 1)
+#define CPU_BOOT_STATUS_MASK		((UL(1) << CPU_STUCK_REASON_SHIFT) - 1)
 
 #define CPU_MMU_OFF			(-1)
 #define CPU_BOOT_SUCCESS		(0)
···
 /* Fatal system error detected by secondary CPU, crash the system */
 #define CPU_PANIC_KERNEL		(3)
 
-#define CPU_STUCK_REASON_52_BIT_VA	(1U << CPU_STUCK_REASON_SHIFT)
-#define CPU_STUCK_REASON_NO_GRAN	(2U << CPU_STUCK_REASON_SHIFT)
+#define CPU_STUCK_REASON_52_BIT_VA	(UL(1) << CPU_STUCK_REASON_SHIFT)
+#define CPU_STUCK_REASON_NO_GRAN	(UL(2) << CPU_STUCK_REASON_SHIFT)
 
 #ifndef __ASSEMBLY__
 

arch/arm64/include/asm/unistd.h

···
  * The following SVCs are ARM private.
  */
 #define __ARM_NR_COMPAT_BASE		0x0f0000
-#define __ARM_NR_compat_cacheflush	(__ARM_NR_COMPAT_BASE+2)
-#define __ARM_NR_compat_set_tls		(__ARM_NR_COMPAT_BASE+5)
+#define __ARM_NR_compat_cacheflush	(__ARM_NR_COMPAT_BASE + 2)
+#define __ARM_NR_compat_set_tls		(__ARM_NR_COMPAT_BASE + 5)
+#define __ARM_NR_COMPAT_END		(__ARM_NR_COMPAT_BASE + 0x800)
 
-#define __NR_compat_syscalls		399
+#define __NR_compat_syscalls		400
 #endif
 
 #define __ARCH_WANT_SYS_CLONE

arch/arm64/include/asm/unistd32.h

···
 __SYSCALL(__NR_statx, sys_statx)
 #define __NR_rseq 398
 __SYSCALL(__NR_rseq, sys_rseq)
+#define __NR_io_pgetevents 399
+__SYSCALL(__NR_io_pgetevents, compat_sys_io_pgetevents)
 
 /*
  * Please add new compat syscalls above this comment and update

arch/arm64/include/uapi/asm/ptrace.h

···
 #include <linux/types.h>
 
 #include <asm/hwcap.h>
-#include <asm/sigcontext.h>
+#include <asm/sve_context.h>
 
 
 /*
···
  */
 
 /* Offset from the start of struct user_sve_header to the register data */
-#define SVE_PT_REGS_OFFSET					\
-	((sizeof(struct sve_context) + (SVE_VQ_BYTES - 1))	\
-		/ SVE_VQ_BYTES * SVE_VQ_BYTES)
+#define SVE_PT_REGS_OFFSET						\
+	((sizeof(struct user_sve_header) + (__SVE_VQ_BYTES - 1))	\
+		/ __SVE_VQ_BYTES * __SVE_VQ_BYTES)
 
 /*
  * The register data content and layout depends on the value of the
···
  * Additional data might be appended in the future.
  */
 
-#define SVE_PT_SVE_ZREG_SIZE(vq)	SVE_SIG_ZREG_SIZE(vq)
-#define SVE_PT_SVE_PREG_SIZE(vq)	SVE_SIG_PREG_SIZE(vq)
-#define SVE_PT_SVE_FFR_SIZE(vq)		SVE_SIG_FFR_SIZE(vq)
+#define SVE_PT_SVE_ZREG_SIZE(vq)	__SVE_ZREG_SIZE(vq)
+#define SVE_PT_SVE_PREG_SIZE(vq)	__SVE_PREG_SIZE(vq)
+#define SVE_PT_SVE_FFR_SIZE(vq)		__SVE_FFR_SIZE(vq)
 #define SVE_PT_SVE_FPSR_SIZE		sizeof(__u32)
 #define SVE_PT_SVE_FPCR_SIZE		sizeof(__u32)
-
-#define __SVE_SIG_TO_PT(offset) \
-	((offset) - SVE_SIG_REGS_OFFSET + SVE_PT_REGS_OFFSET)
 
 #define SVE_PT_SVE_OFFSET		SVE_PT_REGS_OFFSET
 
 #define SVE_PT_SVE_ZREGS_OFFSET \
-	__SVE_SIG_TO_PT(SVE_SIG_ZREGS_OFFSET)
+	(SVE_PT_REGS_OFFSET + __SVE_ZREGS_OFFSET)
 #define SVE_PT_SVE_ZREG_OFFSET(vq, n) \
-	__SVE_SIG_TO_PT(SVE_SIG_ZREG_OFFSET(vq, n))
+	(SVE_PT_REGS_OFFSET + __SVE_ZREG_OFFSET(vq, n))
 #define SVE_PT_SVE_ZREGS_SIZE(vq) \
-	(SVE_PT_SVE_ZREG_OFFSET(vq, SVE_NUM_ZREGS) - SVE_PT_SVE_ZREGS_OFFSET)
+	(SVE_PT_SVE_ZREG_OFFSET(vq, __SVE_NUM_ZREGS) - SVE_PT_SVE_ZREGS_OFFSET)
 
 #define SVE_PT_SVE_PREGS_OFFSET(vq) \
-	__SVE_SIG_TO_PT(SVE_SIG_PREGS_OFFSET(vq))
+	(SVE_PT_REGS_OFFSET + __SVE_PREGS_OFFSET(vq))
 #define SVE_PT_SVE_PREG_OFFSET(vq, n) \
-	__SVE_SIG_TO_PT(SVE_SIG_PREG_OFFSET(vq, n))
+	(SVE_PT_REGS_OFFSET + __SVE_PREG_OFFSET(vq, n))
 #define SVE_PT_SVE_PREGS_SIZE(vq) \
-	(SVE_PT_SVE_PREG_OFFSET(vq, SVE_NUM_PREGS) - \
+	(SVE_PT_SVE_PREG_OFFSET(vq, __SVE_NUM_PREGS) - \
 		SVE_PT_SVE_PREGS_OFFSET(vq))
 
 #define SVE_PT_SVE_FFR_OFFSET(vq) \
-	__SVE_SIG_TO_PT(SVE_SIG_FFR_OFFSET(vq))
+	(SVE_PT_REGS_OFFSET + __SVE_FFR_OFFSET(vq))
 
 #define SVE_PT_SVE_FPSR_OFFSET(vq)				\
 	((SVE_PT_SVE_FFR_OFFSET(vq) + SVE_PT_SVE_FFR_SIZE(vq) +	\
-			(SVE_VQ_BYTES - 1))			\
-		/ SVE_VQ_BYTES * SVE_VQ_BYTES)
+			(__SVE_VQ_BYTES - 1))			\
+		/ __SVE_VQ_BYTES * __SVE_VQ_BYTES)
 #define SVE_PT_SVE_FPCR_OFFSET(vq) \
 	(SVE_PT_SVE_FPSR_OFFSET(vq) + SVE_PT_SVE_FPSR_SIZE)
 
···
 
 #define SVE_PT_SVE_SIZE(vq, flags)					\
 	((SVE_PT_SVE_FPCR_OFFSET(vq) + SVE_PT_SVE_FPCR_SIZE		\
-			- SVE_PT_SVE_OFFSET + (SVE_VQ_BYTES - 1))	\
-		/ SVE_VQ_BYTES * SVE_VQ_BYTES)
+			- SVE_PT_SVE_OFFSET + (__SVE_VQ_BYTES - 1))	\
+		/ __SVE_VQ_BYTES * __SVE_VQ_BYTES)
 
 #define SVE_PT_SIZE(vq, flags)						\
 	 (((flags) & SVE_PT_REGS_MASK) == SVE_PT_REGS_SVE ?		\

arch/arm64/include/uapi/asm/sigcontext.h

···
 
 #endif /* !__ASSEMBLY__ */
 
+#include <asm/sve_context.h>
+
 /*
  * The SVE architecture leaves space for future expansion of the
  * vector length beyond its initial architectural limit of 2048 bits
···
  * See linux/Documentation/arm64/sve.txt for a description of the VL/VQ
  * terminology.
  */
-#define SVE_VQ_BYTES		16	/* number of bytes per quadword */
+#define SVE_VQ_BYTES		__SVE_VQ_BYTES	/* bytes per quadword */
 
-#define SVE_VQ_MIN		1
-#define SVE_VQ_MAX		512
+#define SVE_VQ_MIN		__SVE_VQ_MIN
+#define SVE_VQ_MAX		__SVE_VQ_MAX
 
-#define SVE_VL_MIN		(SVE_VQ_MIN * SVE_VQ_BYTES)
-#define SVE_VL_MAX		(SVE_VQ_MAX * SVE_VQ_BYTES)
+#define SVE_VL_MIN		__SVE_VL_MIN
+#define SVE_VL_MAX		__SVE_VL_MAX
 
-#define SVE_NUM_ZREGS		32
-#define SVE_NUM_PREGS		16
+#define SVE_NUM_ZREGS		__SVE_NUM_ZREGS
+#define SVE_NUM_PREGS		__SVE_NUM_PREGS
 
-#define sve_vl_valid(vl) \
-	((vl) % SVE_VQ_BYTES == 0 && (vl) >= SVE_VL_MIN && (vl) <= SVE_VL_MAX)
-#define sve_vq_from_vl(vl)	((vl) / SVE_VQ_BYTES)
-#define sve_vl_from_vq(vq)	((vq) * SVE_VQ_BYTES)
+#define sve_vl_valid(vl)	__sve_vl_valid(vl)
+#define sve_vq_from_vl(vl)	__sve_vq_from_vl(vl)
+#define sve_vl_from_vq(vq)	__sve_vl_from_vq(vq)
 
 /*
  * If the SVE registers are currently live for the thread at signal delivery,
···
  * Additional data might be appended in the future.
  */
 
-#define SVE_SIG_ZREG_SIZE(vq)	((__u32)(vq) * SVE_VQ_BYTES)
-#define SVE_SIG_PREG_SIZE(vq)	((__u32)(vq) * (SVE_VQ_BYTES / 8))
-#define SVE_SIG_FFR_SIZE(vq)	SVE_SIG_PREG_SIZE(vq)
+#define SVE_SIG_ZREG_SIZE(vq)	__SVE_ZREG_SIZE(vq)
+#define SVE_SIG_PREG_SIZE(vq)	__SVE_PREG_SIZE(vq)
+#define SVE_SIG_FFR_SIZE(vq)	__SVE_FFR_SIZE(vq)
 
 #define SVE_SIG_REGS_OFFSET					\
-	((sizeof(struct sve_context) + (SVE_VQ_BYTES - 1))	\
-		/ SVE_VQ_BYTES * SVE_VQ_BYTES)
+	((sizeof(struct sve_context) + (__SVE_VQ_BYTES - 1))	\
+		/ __SVE_VQ_BYTES * __SVE_VQ_BYTES)
 
-#define SVE_SIG_ZREGS_OFFSET	SVE_SIG_REGS_OFFSET
+#define SVE_SIG_ZREGS_OFFSET \
+		(SVE_SIG_REGS_OFFSET + __SVE_ZREGS_OFFSET)
 #define SVE_SIG_ZREG_OFFSET(vq, n) \
-	(SVE_SIG_ZREGS_OFFSET + SVE_SIG_ZREG_SIZE(vq) * (n))
-#define SVE_SIG_ZREGS_SIZE(vq) \
-	(SVE_SIG_ZREG_OFFSET(vq, SVE_NUM_ZREGS) - SVE_SIG_ZREGS_OFFSET)
+		(SVE_SIG_REGS_OFFSET + __SVE_ZREG_OFFSET(vq, n))
+#define SVE_SIG_ZREGS_SIZE(vq) __SVE_ZREGS_SIZE(vq)
 
 #define SVE_SIG_PREGS_OFFSET(vq) \
-	(SVE_SIG_ZREGS_OFFSET + SVE_SIG_ZREGS_SIZE(vq))
+		(SVE_SIG_REGS_OFFSET + __SVE_PREGS_OFFSET(vq))
 #define SVE_SIG_PREG_OFFSET(vq, n) \
-	(SVE_SIG_PREGS_OFFSET(vq) + SVE_SIG_PREG_SIZE(vq) * (n))
-#define SVE_SIG_PREGS_SIZE(vq) \
-	(SVE_SIG_PREG_OFFSET(vq, SVE_NUM_PREGS) - SVE_SIG_PREGS_OFFSET(vq))
+		(SVE_SIG_REGS_OFFSET + __SVE_PREG_OFFSET(vq, n))
+#define SVE_SIG_PREGS_SIZE(vq) __SVE_PREGS_SIZE(vq)
 
 #define SVE_SIG_FFR_OFFSET(vq) \
-	(SVE_SIG_PREGS_OFFSET(vq) + SVE_SIG_PREGS_SIZE(vq))
+		(SVE_SIG_REGS_OFFSET + __SVE_FFR_OFFSET(vq))
 
 #define SVE_SIG_REGS_SIZE(vq) \
-	(SVE_SIG_FFR_OFFSET(vq) + SVE_SIG_FFR_SIZE(vq) - SVE_SIG_REGS_OFFSET)
+		(__SVE_FFR_OFFSET(vq) + __SVE_FFR_SIZE(vq))
 
-#define SVE_SIG_CONTEXT_SIZE(vq) (SVE_SIG_REGS_OFFSET + SVE_SIG_REGS_SIZE(vq))
-
+#define SVE_SIG_CONTEXT_SIZE(vq) \
+		(SVE_SIG_REGS_OFFSET + SVE_SIG_REGS_SIZE(vq))
 
 #endif /* _UAPI__ASM_SIGCONTEXT_H */

arch/arm64/include/uapi/asm/sve_context.h

···
+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
+/* Copyright (C) 2017-2018 ARM Limited */
+
+/*
+ * For use by other UAPI headers only.
+ * Do not make direct use of header or its definitions.
+ */
+
+#ifndef _UAPI__ASM_SVE_CONTEXT_H
+#define _UAPI__ASM_SVE_CONTEXT_H
+
+#include <linux/types.h>
+
+#define __SVE_VQ_BYTES		16	/* number of bytes per quadword */
+
+#define __SVE_VQ_MIN		1
+#define __SVE_VQ_MAX		512
+
+#define __SVE_VL_MIN		(__SVE_VQ_MIN * __SVE_VQ_BYTES)
+#define __SVE_VL_MAX		(__SVE_VQ_MAX * __SVE_VQ_BYTES)
+
+#define __SVE_NUM_ZREGS		32
+#define __SVE_NUM_PREGS		16
+
+#define __sve_vl_valid(vl)			\
+	((vl) % __SVE_VQ_BYTES == 0 &&		\
+	 (vl) >= __SVE_VL_MIN &&		\
+	 (vl) <= __SVE_VL_MAX)
+
+#define __sve_vq_from_vl(vl)	((vl) / __SVE_VQ_BYTES)
+#define __sve_vl_from_vq(vq)	((vq) * __SVE_VQ_BYTES)
+
+#define __SVE_ZREG_SIZE(vq)	((__u32)(vq) * __SVE_VQ_BYTES)
+#define __SVE_PREG_SIZE(vq)	((__u32)(vq) * (__SVE_VQ_BYTES / 8))
+#define __SVE_FFR_SIZE(vq)	__SVE_PREG_SIZE(vq)
+
+#define __SVE_ZREGS_OFFSET	0
+#define __SVE_ZREG_OFFSET(vq, n) \
+	(__SVE_ZREGS_OFFSET + __SVE_ZREG_SIZE(vq) * (n))
+#define __SVE_ZREGS_SIZE(vq) \
+	(__SVE_ZREG_OFFSET(vq, __SVE_NUM_ZREGS) - __SVE_ZREGS_OFFSET)
+
+#define __SVE_PREGS_OFFSET(vq) \
+	(__SVE_ZREGS_OFFSET + __SVE_ZREGS_SIZE(vq))
+#define __SVE_PREG_OFFSET(vq, n) \
+	(__SVE_PREGS_OFFSET(vq) + __SVE_PREG_SIZE(vq) * (n))
+#define __SVE_PREGS_SIZE(vq) \
+	(__SVE_PREG_OFFSET(vq, __SVE_NUM_PREGS) - __SVE_PREGS_OFFSET(vq))
+
+#define __SVE_FFR_OFFSET(vq) \
+	(__SVE_PREGS_OFFSET(vq) + __SVE_PREGS_SIZE(vq))
+
+#endif /* ! _UAPI__ASM_SVE_CONTEXT_H */

arch/arm64/kernel/Makefile

···
 CFLAGS_REMOVE_return_address.o = -pg
 
 # Object file lists.
-arm64-obj-y		:= debug-monitors.o entry.o irq.o fpsimd.o		\
+obj-y			:= debug-monitors.o entry.o irq.o fpsimd.o		\
 			   entry-fpsimd.o process.o ptrace.o setup.o signal.o	\
 			   sys.o stacktrace.o time.o traps.o io.o vdso.o	\
 			   hyp-stub.o psci.o cpu_ops.o insn.o	\
···
 $(obj)/%.stub.o: $(obj)/%.o FORCE
 	$(call if_changed,objcopy)
 
-arm64-obj-$(CONFIG_COMPAT)		+= sys32.o kuser32.o signal32.o 	\
+obj-$(CONFIG_COMPAT)			+= sys32.o kuser32.o signal32.o 	\
 					   sys_compat.o
-arm64-obj-$(CONFIG_FUNCTION_TRACER)	+= ftrace.o entry-ftrace.o
-arm64-obj-$(CONFIG_MODULES)		+= module.o
-arm64-obj-$(CONFIG_ARM64_MODULE_PLTS)	+= module-plts.o
-arm64-obj-$(CONFIG_PERF_EVENTS)		+= perf_regs.o perf_callchain.o
-arm64-obj-$(CONFIG_HW_PERF_EVENTS)	+= perf_event.o
-arm64-obj-$(CONFIG_HAVE_HW_BREAKPOINT)	+= hw_breakpoint.o
-arm64-obj-$(CONFIG_CPU_PM)		+= sleep.o suspend.o
-arm64-obj-$(CONFIG_CPU_IDLE)		+= cpuidle.o
-arm64-obj-$(CONFIG_JUMP_LABEL)		+= jump_label.o
-arm64-obj-$(CONFIG_KGDB)		+= kgdb.o
-arm64-obj-$(CONFIG_EFI)			+= efi.o efi-entry.stub.o		\
+obj-$(CONFIG_FUNCTION_TRACER)		+= ftrace.o entry-ftrace.o
+obj-$(CONFIG_MODULES)			+= module.o
+obj-$(CONFIG_ARM64_MODULE_PLTS)		+= module-plts.o
+obj-$(CONFIG_PERF_EVENTS)		+= perf_regs.o perf_callchain.o
+obj-$(CONFIG_HW_PERF_EVENTS)		+= perf_event.o
+obj-$(CONFIG_HAVE_HW_BREAKPOINT)	+= hw_breakpoint.o
+obj-$(CONFIG_CPU_PM)			+= sleep.o suspend.o
+obj-$(CONFIG_CPU_IDLE)			+= cpuidle.o
+obj-$(CONFIG_JUMP_LABEL)		+= jump_label.o
+obj-$(CONFIG_KGDB)			+= kgdb.o
+obj-$(CONFIG_EFI)			+= efi.o efi-entry.stub.o		\
 					   efi-rt-wrapper.o
-arm64-obj-$(CONFIG_PCI)			+= pci.o
-arm64-obj-$(CONFIG_ARMV8_DEPRECATED)	+= armv8_deprecated.o
-arm64-obj-$(CONFIG_ACPI)		+= acpi.o
-arm64-obj-$(CONFIG_ACPI_NUMA)		+= acpi_numa.o
-arm64-obj-$(CONFIG_ARM64_ACPI_PARKING_PROTOCOL)	+= acpi_parking_protocol.o
-arm64-obj-$(CONFIG_PARAVIRT)		+= paravirt.o
-arm64-obj-$(CONFIG_RANDOMIZE_BASE)	+= kaslr.o
-arm64-obj-$(CONFIG_HIBERNATION)		+= hibernate.o hibernate-asm.o
-arm64-obj-$(CONFIG_KEXEC_CORE)		+= machine_kexec.o relocate_kernel.o	\
+obj-$(CONFIG_PCI)			+= pci.o
+obj-$(CONFIG_ARMV8_DEPRECATED)		+= armv8_deprecated.o
+obj-$(CONFIG_ACPI)			+= acpi.o
+obj-$(CONFIG_ACPI_NUMA)			+= acpi_numa.o
+obj-$(CONFIG_ARM64_ACPI_PARKING_PROTOCOL)	+= acpi_parking_protocol.o
+obj-$(CONFIG_PARAVIRT)			+= paravirt.o
+obj-$(CONFIG_RANDOMIZE_BASE)		+= kaslr.o
+obj-$(CONFIG_HIBERNATION)		+= hibernate.o hibernate-asm.o
+obj-$(CONFIG_KEXEC_CORE)		+= machine_kexec.o relocate_kernel.o	\
 					   cpu-reset.o
-arm64-obj-$(CONFIG_KEXEC_FILE)		+= machine_kexec_file.o kexec_image.o
-arm64-obj-$(CONFIG_ARM64_RELOC_TEST)	+= arm64-reloc-test.o
+obj-$(CONFIG_KEXEC_FILE)		+= machine_kexec_file.o kexec_image.o
+obj-$(CONFIG_ARM64_RELOC_TEST)		+= arm64-reloc-test.o
 arm64-reloc-test-y := reloc_test_core.o reloc_test_syms.o
-arm64-obj-$(CONFIG_CRASH_DUMP)		+= crash_dump.o
-arm64-obj-$(CONFIG_CRASH_CORE)		+= crash_core.o
-arm64-obj-$(CONFIG_ARM_SDE_INTERFACE)	+= sdei.o
-arm64-obj-$(CONFIG_ARM64_SSBD)		+= ssbd.o
-arm64-obj-$(CONFIG_ARM64_PTR_AUTH)	+= pointer_auth.o
+obj-$(CONFIG_CRASH_DUMP)		+= crash_dump.o
+obj-$(CONFIG_CRASH_CORE)		+= crash_core.o
+obj-$(CONFIG_ARM_SDE_INTERFACE)		+= sdei.o
+obj-$(CONFIG_ARM64_SSBD)		+= ssbd.o
+obj-$(CONFIG_ARM64_PTR_AUTH)		+= pointer_auth.o
 
-obj-y					+= $(arm64-obj-y) vdso/ probes/
-obj-m					+= $(arm64-obj-m)
+obj-y					+= vdso/ probes/
 head-y					:= head.o
 extra-y					+= $(head-y) vmlinux.lds
 

arch/arm64/kernel/entry.S

···
 	mov	sp, x19
 	.endm
 
-/*
- * These are the registers used in the syscall handler, and allow us to
- * have in theory up to 7 arguments to a function - x0 to x6.
- *
- * x7 is reserved for the system call number in 32-bit mode.
- */
-wsc_nr	.req	w25		// number of system calls
-xsc_nr	.req	x25		// number of system calls (zero-extended)
-wscno	.req	w26		// syscall number
-xscno	.req	x26		// syscall number (zero-extended)
-stbl	.req	x27		// syscall table pointer
+/* GPRs used by entry code */
 tsk	.req	x28		// current thread_info
 
 /*

arch/arm64/kernel/sys_compat.c

···
 /*
  * Handle all unrecognised system calls.
  */
-long compat_arm_syscall(struct pt_regs *regs)
+long compat_arm_syscall(struct pt_regs *regs, int scno)
 {
-	unsigned int no = regs->regs[7];
 	void __user *addr;
 
-	switch (no) {
+	switch (scno) {
 	/*
 	 * Flush a region from virtual address 'r0' to virtual address 'r1'
 	 * _exclusive_.  There is no alignment requirement on either address;
···
 
 	default:
 		/*
-		 * Calls 9f00xx..9f07ff are defined to return -ENOSYS
+		 * Calls 0xf0xxx..0xf07ff are defined to return -ENOSYS
 		 * if not implemented, rather than raising SIGILL. This
 		 * way the calling program can gracefully determine whether
 		 * a feature is supported.
 		 */
-		if ((no & 0xffff) <= 0x7ff)
+		if (scno < __ARM_NR_COMPAT_END)
 			return -ENOSYS;
 		break;
 	}
···
 		(compat_thumb_mode(regs) ? 2 : 4);
 
 	arm64_notify_die("Oops - bad compat syscall(2)", regs,
-			 SIGILL, ILL_ILLTRP, addr, no);
+			 SIGILL, ILL_ILLTRP, addr, scno);
 	return 0;
 }

arch/arm64/kernel/syscall.c

···
 #include <asm/thread_info.h>
 #include <asm/unistd.h>
 
-long compat_arm_syscall(struct pt_regs *regs);
-
+long compat_arm_syscall(struct pt_regs *regs, int scno);
 long sys_ni_syscall(void);
 
-asmlinkage long do_ni_syscall(struct pt_regs *regs)
+static long do_ni_syscall(struct pt_regs *regs, int scno)
 {
 #ifdef CONFIG_COMPAT
 	long ret;
 	if (is_compat_task()) {
-		ret = compat_arm_syscall(regs);
+		ret = compat_arm_syscall(regs, scno);
 		if (ret != -ENOSYS)
 			return ret;
 	}
···
 		syscall_fn = syscall_table[array_index_nospec(scno, sc_nr)];
 		ret = __invoke_syscall(regs, syscall_fn);
 	} else {
-		ret = do_ni_syscall(regs);
+		ret = do_ni_syscall(regs, scno);
 	}
 
 	regs->regs[0] = ret;

arch/arm64/mm/init.c

···
 		 * memory spans, randomize the linear region as well.
 		 */
 		if (memstart_offset_seed > 0 && range >= ARM64_MEMSTART_ALIGN) {
-			range = range / ARM64_MEMSTART_ALIGN + 1;
+			range /= ARM64_MEMSTART_ALIGN;
 			memstart_addr -= ARM64_MEMSTART_ALIGN *
 					 ((range * memstart_offset_seed) >> 16);
 		}

drivers/firmware/arm_sdei.c

···
 
 static bool __init sdei_present_dt(void)
 {
-	struct platform_device *pdev;
 	struct device_node *np, *fw_np;
 
 	fw_np = of_find_node_by_name(NULL, "firmware");
···
 		return false;
 
 	np = of_find_matching_node(fw_np, sdei_of_match);
-	of_node_put(fw_np);
 	if (!np)
 		return false;
-
-	pdev = of_platform_device_create(np, sdei_driver.driver.name, NULL);
 	of_node_put(np);
-	if (!pdev)
-		return false;
 
 	return true;
 }

drivers/perf/hisilicon/hisi_uncore_ddrc_pmu.c

···
 #define DDRC_FLUX_RCMD          0x38c
 #define DDRC_PRE_CMD            0x3c0
 #define DDRC_ACT_CMD            0x3c4
-#define DDRC_BNK_CHG            0x3c8
 #define DDRC_RNK_CHG            0x3cc
+#define DDRC_RW_CHG             0x3d0
 #define DDRC_EVENT_CTRL         0x6C0
 #define DDRC_INT_MASK		0x6c8
 #define DDRC_INT_STATUS		0x6cc
···
 
 static const u32 ddrc_reg_off[] = {
 	DDRC_FLUX_WR, DDRC_FLUX_RD, DDRC_FLUX_WCMD, DDRC_FLUX_RCMD,
-	DDRC_PRE_CMD, DDRC_ACT_CMD, DDRC_BNK_CHG, DDRC_RNK_CHG
+	DDRC_PRE_CMD, DDRC_ACT_CMD, DDRC_RNK_CHG, DDRC_RW_CHG
 };
 
 /*