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linux/arch/arm64/include/asm
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Will Deacon a14949e09a arm64: cmpxchg: truncate sub-word signed types before comparison 
When performing a cmpxchg operation on a signed sub-word type (e.g. s8),
we need to ensure that the upper register bits of the "old" value used
for comparison are zeroed, otherwise we may erroneously fail the cmpxchg
which may even be interpreted as success by the caller (if the compiler
performs the truncation as part of its check). This has been observed
in mod_state, where negative values where causing problems with
this_cpu_cmpxchg.

This patch fixes the issue by explicitly casting 8-bit and 16-bit "old"
values using unsigned types in our cmpxchg wrappers. 32-bit types can be
left alone, since the underlying asm makes use of W registers in this
case.

Reported-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
 		2015-07-30 20:16:53 +01:00
..
xen xen/arm/arm64: merge xen/mm32.c into xen/mm.c 2014-12-04 12:41:53 +00:00
Kbuild mm: clean up per architecture MM hook header files 2015-07-17 16:39:53 -07:00
acenv.h ARM64 / ACPI: Get RSDP and ACPI boot-time tables 2015-03-25 11:49:30 +00:00
acpi.h ACPI / ARM64: add BAD_MADT_GICC_ENTRY() macro 2015-07-07 14:54:59 +01:00
alternative.h arm64: alternative: put secondary CPUs into polling loop during patch 2015-07-30 19:07:28 +01:00
arch_timer.h arm64: fix missing linux/bug.h include in asm/arch_timer.h 2015-01-07 11:40:59 +00:00
arm-cci.h arm-cci: Get rid of secure transactions for PMU driver 2015-03-27 13:44:35 +00:00
asm-offsets.h
…
assembler.h arm64: force CONFIG_SMP=y and remove redundant #ifdefs 2015-07-27 11:08:40 +01:00
atomic.h arm64: atomics: implement atomic{,64}_cmpxchg using cmpxchg 2015-07-27 15:28:53 +01:00
atomic_ll_sc.h arm64: atomic64_dec_if_positive: fix incorrect branch condition 2015-07-27 15:28:54 +01:00
atomic_lse.h arm64: lse: fix lse cmpxchg code indentation 2015-07-29 18:32:09 +01:00
barrier.h arm64: force CONFIG_SMP=y and remove redundant #ifdefs 2015-07-27 11:08:40 +01:00
bitops.h arch,arm64: Convert smp_mb__*() 2014-04-18 11:40:33 +02:00
bitrev.h ARM: 8189/1: arm64:add bitrev.h file to support rbit instruction 2014-12-22 16:47:32 +00:00
boot.h arm64: use fixmap region for permanent FDT mapping 2015-06-02 16:31:33 +01:00
bug.h arm64/BUG: Use BRK instruction for generic BUG traps 2015-07-27 11:08:42 +01:00
cache.h arm64: Implement support for read-mostly sections 2014-12-03 10:19:35 +00:00
cacheflush.h arm64: kill flush_cache_all() 2015-05-19 15:27:42 +01:00
cachetype.h arm64: kernel: add support for cpu cache information 2015-01-15 11:55:07 +00:00
cmpxchg.h arm64: cmpxchg: truncate sub-word signed types before comparison 2015-07-30 20:16:53 +01:00
compat.h arm64: compat: Remove incorrect comment in compat_siginfo 2015-02-02 16:44:39 +00:00
compiler.h arm64: Miscellaneous header files 2012-09-17 13:42:21 +01:00
cpu.h arm64: sanity checks: add missing AArch32 registers 2015-01-07 11:40:58 +00:00
cpu_ops.h ARM64: kernel: unify ACPI and DT cpus initialization 2015-05-19 16:09:29 +01:00
cpufeature.h arm64: lse: rename ARM64_CPU_FEAT_LSE_ATOMICS for consistency 2015-07-27 15:28:54 +01:00
cpuidle.h arm64: kernel: rename __cpu_suspend to keep it aligned with arm 2015-06-19 14:46:39 +01:00
cputype.h arm64: kernel: Move config_sctlr_el1 2015-07-27 11:08:41 +01:00
debug-monitors.h arm64: debug: rename enum debug_el to avoid symbol collision 2015-07-27 18:36:54 +01:00
device.h arm64: introduce is_device_dma_coherent 2014-12-04 12:41:49 +00:00
dma-mapping.h arm64 : Introduce support for ACPI _CCA object 2015-06-15 14:40:49 +02:00
dmi.h arm64: dmi: Add SMBIOS/DMI support 2014-11-05 09:03:25 +01:00
efi.h arm64/efi: move virtmap init to early initcall 2015-01-22 14:59:25 +00:00
elf.h mm: fold arch_randomize_brk into ARCH_HAS_ELF_RANDOMIZE 2015-04-14 16:49:05 -07:00
esr.h arm64/debug: Add missing #includes 2015-07-27 11:08:42 +01:00
exception.h arm64: Use irqchip_init() for interrupt controller initialisation 2013-03-26 16:02:23 +00:00
exec.h arm64: Miscellaneous header files 2012-09-17 13:42:21 +01:00
fb.h arm64: Device specific operations 2012-09-17 13:42:04 +01:00
fixmap.h arm64: use fixmap region for permanent FDT mapping 2015-06-02 16:31:33 +01:00
fpsimd.h arm64: add support for kernel mode NEON in interrupt context 2014-05-08 11:31:57 +02:00
fpsimdmacros.h arm64: Avoid breakage caused by .altmacro in fpsimd save/restore macros 2015-01-29 17:24:39 +00:00
ftrace.h arm64: ftrace: Add system call tracepoint 2014-05-29 09:08:33 +01:00
futex.h arm64: atomics: prefetch the destination word for write prior to stxr 2015-07-27 15:28:53 +01:00
hardirq.h arm64: force CONFIG_SMP=y and remove redundant #ifdefs 2015-07-27 11:08:40 +01:00
hugetlb.h arm64: hugetlb: remove paragraph about writing to FSF 2015-07-27 11:08:40 +01:00
hw_breakpoint.h arm64: ptrace: fix compat hardware watchpoint reporting 2014-08-28 20:01:36 +01:00
hwcap.h arm64: Add COMPAT_HWCAP_LPAE 2014-11-17 10:43:42 +00:00
hypervisor.h arm64/xen: introduce asm/xen header files on arm64 2013-06-07 10:39:45 +00:00
insn.h arm64: insn: Add aarch64_{get,set}_branch_offset 2015-06-03 15:43:24 +01:00
io.h arm64 updates for 4.2, mostly refactoring/clean-up: 2015-06-24 10:02:15 -07:00
irq.h irqchip: Add GICv2 specific ACPI boot support 2015-03-26 15:13:07 +00:00
irq_work.h arm64: force CONFIG_SMP=y and remove redundant #ifdefs 2015-07-27 11:08:40 +01:00
irqflags.h arm64: Add macros to manage processor debug state 2014-02-26 11:16:25 +00:00
jump_label.h jump_label: Allow asm/jump_label.h to be included in assembly 2015-04-09 09:40:23 +02:00
kgdb.h arm64: Fix typos in KGDB macros 2014-09-25 15:35:41 +01:00
kvm_arm.h KVM/ARM changes for v4.1: 2015-04-07 18:09:20 +02:00
kvm_asm.h arm64 updates for 4.2, mostly refactoring/clean-up: 2015-06-24 10:02:15 -07:00
kvm_coproc.h arm64: KVM: common infrastructure for handling AArch32 CP14/CP15 2014-07-11 04:57:44 -07:00
kvm_emulate.h Fairly small update, but there are some interesting new features. 2015-02-13 09:55:09 -08:00
kvm_host.h arm64: KVM: Switch vgic save/restore to alternative_insn 2015-06-12 15:12:08 +01:00
kvm_mmio.h KVM: arm/arm64: rework MMIO abort handling to use KVM MMIO bus 2015-03-30 17:07:19 +01:00
kvm_mmu.h arm64 updates for 4.1: 2015-04-16 13:58:29 -05:00
kvm_psci.h ARM/ARM64: KVM: Make kvm_psci_call() return convention more flexible 2014-04-30 04:18:57 -07:00
linkage.h arm64: fix alignment padding in assembly code 2012-10-20 11:12:01 +01:00
lse.h arm64: lse: rename ARM64_CPU_FEAT_LSE_ATOMICS for consistency 2015-07-27 15:28:54 +01:00
memblock.h arm64: MMU initialisation 2012-09-17 13:41:56 +01:00
memory.h arm64: Fix overlapping VA allocations 2015-01-23 14:13:14 +00:00
mmu.h arm64: remove dead code 2015-07-27 11:08:39 +01:00
mmu_context.h arm64 updates for 4.1: 2015-04-16 13:58:29 -05:00
module.h arm64: Loadable modules 2012-09-17 13:42:19 +01:00
neon.h arm64: add support for kernel mode NEON in interrupt context 2014-05-08 11:31:57 +02:00
opcodes.h arm64: Add AArch32 instruction set condition code checks 2014-11-20 16:33:45 +00:00
page.h arm64 updates for 4.1: 2015-04-16 13:58:29 -05:00
pci.h ARM64 / ACPI: Introduce PCI stub functions for ACPI 2015-03-25 11:49:31 +00:00
percpu.h arm64: force CONFIG_SMP=y and remove redundant #ifdefs 2015-07-27 11:08:40 +01:00
perf_event.h arm64: perf: factor out callchain code 2015-07-27 11:08:39 +01:00
pgalloc.h arm64: expose number of page table levels on Kconfig level 2015-04-14 16:49:01 -07:00
pgtable-hwdef.h arm64: Add support for hardware updates of the access and dirty pte bits 2015-07-27 11:08:39 +01:00
pgtable-types.h arm64: expose number of page table levels on Kconfig level 2015-04-14 16:49:01 -07:00
pgtable.h arm64: pgtable: fix definition of pte_valid 2015-07-28 16:14:03 +01:00
pmu.h arm64: pmu: add support for interrupt-affinity property 2015-03-24 15:09:47 +00:00
proc-fns.h arm64: kill flush_cache_all() 2015-05-19 15:27:42 +01:00
processor.h arm64: kernel: Add support for Privileged Access Never 2015-07-27 11:08:41 +01:00
psci.h arm64: psci: remove ACPI coupling 2015-05-27 13:22:24 +01:00
ptrace.h arm64: force CONFIG_SMP=y and remove redundant #ifdefs 2015-07-27 11:08:40 +01:00
seccomp.h arm64: add seccomp support 2014-11-28 10:24:59 +00:00
shmparam.h arm64: ELF definitions 2012-09-17 13:42:07 +01:00
signal32.h arm64: Use get_signal() signal_setup_done() 2014-08-06 12:56:16 +02:00
smp.h arm64: force CONFIG_SMP=y and remove redundant #ifdefs 2015-07-27 11:08:40 +01:00
smp_plat.h arm64: remove dead-code depending on CONFIG_UP_LATE_INIT 2015-07-29 18:32:09 +01:00
sparsemem.h arm64: mm: update max pa bits to 48 2014-08-19 20:23:02 +01:00
spinlock.h arm64: spinlock: fix ll/sc unlock on big-endian systems 2015-07-28 14:48:00 +01:00
spinlock_types.h arm64: include linux/types.h in asm/spinlock_types.h 2015-07-27 11:09:34 +01:00
stackprotector.h arm64: Add CONFIG_CC_STACKPROTECTOR 2014-07-09 12:23:48 +01:00
stacktrace.h arm64: Exception handling 2012-09-17 10:24:46 +01:00
stat.h UAPI: (Scripted) Disintegrate arch/arm64/include/asm 2012-10-11 11:05:13 +01:00
string.h arm64: lib: Implement optimized string length routines 2014-05-23 15:17:12 +01:00
suspend.h arm64: kernel: rename __cpu_suspend to keep it aligned with arm 2015-06-19 14:46:39 +01:00
sync_bitops.h arm64/xen: introduce asm/xen header files on arm64 2013-06-07 10:39:45 +00:00
syscall.h arm64: Add audit support 2014-07-10 11:06:00 +01:00
sysreg.h arm64: kernel: Add support for Privileged Access Never 2015-07-27 11:08:41 +01:00
system_misc.h arm64: use private ratelimit state along with show_unhandled_signals 2015-06-19 16:26:15 +01:00
thread_info.h arm64: Remove signal translation and exec_domain 2015-04-12 20:58:24 +02:00
timex.h arm64: kernel: compiling issue, need delete read_current_timer() 2013-06-10 17:58:20 +01:00
tlb.h arm64: Use last level TLBI for user pte changes 2015-07-28 11:44:01 +01:00
tlbflush.h arm64: Use last level TLBI for user pte changes 2015-07-28 11:44:01 +01:00
topology.h arm64: force CONFIG_SMP=y and remove redundant #ifdefs 2015-07-27 11:08:40 +01:00
traps.h arm64: Add support for hooks to handle undefined instructions 2014-11-20 16:33:43 +00:00
uaccess.h arm64: kernel: Add support for Privileged Access Never 2015-07-27 11:08:41 +01:00
unistd.h arm64 updates for 3.20: 2015-02-11 18:03:54 -08:00
unistd32.h arm64: fix implementation of mmap2 compat syscall 2015-03-19 10:43:51 +00:00
vdso.h arm64: VDSO support 2012-09-17 13:42:09 +01:00
vdso_datapage.h arm64: VDSO support 2012-09-17 13:42:09 +01:00
virt.h arm64: KVM: remove __kvm_hyp_code_{start,end} from hyp.S 2014-07-11 04:57:35 -07:00
word-at-a-time.h arm64: dcache: select DCACHE_WORD_ACCESS for little-endian CPUs 2013-12-19 17:43:08 +00:00