diff options
| author |   Will Deacon <will.deacon@arm.com> | 2013-10-09 15:54:28 +0100 |
|---|---|---|
| committer |   Catalin Marinas <catalin.marinas@arm.com> | 2013-10-24 15:46:35 +0100 |
| commit | cf10b79a7d88edc689479af989b3a88e9adf07ff (patch) | |
| tree | fffcc72aa8e542ee331622c6f914ec5c6db11e45 | |
| parent | arm64: lockref: add support for lockless lockrefs using cmpxchg (diff) | |
| download | linux-dev-cf10b79a7d88edc689479af989b3a88e9adf07ff.tar.xz linux-dev-cf10b79a7d88edc689479af989b3a88e9adf07ff.zip | |
arm64: cmpxchg: implement cmpxchg64_relaxed
This patch introduces cmpxchg64_relaxed for arm64 using the existing
cmpxchg_local macro, which performs a cmpxchg operation (up to 64 bits)
without barrier semantics.
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
| -rw-r--r-- | arch/arm64/include/asm/cmpxchg.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/arm64/include/asm/cmpxchg.h b/arch/arm64/include/asm/cmpxchg.h index 8a8ce0e73a38..3914c0dcd09c 100644 --- a/arch/arm64/include/asm/cmpxchg.h +++ b/arch/arm64/include/asm/cmpxchg.h @@ -173,4 +173,6 @@ static inline unsigned long __cmpxchg_mb(volatile void *ptr, unsigned long old, #define cmpxchg64(ptr,o,n) cmpxchg((ptr),(o),(n)) #define cmpxchg64_local(ptr,o,n) cmpxchg_local((ptr),(o),(n)) +#define cmpxchg64_relaxed(ptr,o,n) cmpxchg_local((ptr),(o),(n)) + #endif /* __ASM_CMPXCHG_H */ |