diff options
| author | Will Deacon <will.deacon@arm.com> | 2013-10-09 20:17:18 +0400 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2013-10-29 15:06:09 +0400 |
| commit | 775ebcc16b940ebf61bf54d6054a5e639f68b9d6 (patch) | |
| tree | 82d626994ad89ae7d23475721e3f11df798114bc /arch/arm | |
| parent | 2523c67bb6962f98193dce1c73b6efb65a6ea92c (diff) | |
| download | linux-775ebcc16b940ebf61bf54d6054a5e639f68b9d6.tar.xz | |
ARM: 7853/1: cmpxchg: implement cmpxchg64_relaxed
This patch introduces cmpxchg64_relaxed for arm, which performs a 64-bit
cmpxchg operation without barrier semantics. cmpxchg64_local is updated
to use the new operation.
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm')
| -rw-r--r-- | arch/arm/include/asm/cmpxchg.h | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/arch/arm/include/asm/cmpxchg.h b/arch/arm/include/asm/cmpxchg.h index fbd978fc248f..df2fbba7efc8 100644 --- a/arch/arm/include/asm/cmpxchg.h +++ b/arch/arm/include/asm/cmpxchg.h @@ -270,11 +270,13 @@ static inline unsigned long long __cmpxchg64_mb(unsigned long long *ptr, (unsigned long long)(o), \ (unsigned long long)(n))) -#define cmpxchg64_local(ptr, o, n) \ +#define cmpxchg64_relaxed(ptr, o, n) \ ((__typeof__(*(ptr)))__cmpxchg64((ptr), \ (unsigned long long)(o), \ (unsigned long long)(n))) +#define cmpxchg64_local(ptr, o, n) cmpxchg64_relaxed((ptr), (o), (n)) + #endif /* __LINUX_ARM_ARCH__ >= 6 */ #endif /* __ASM_ARM_CMPXCHG_H */ |