diff options
| author | Peter Zijlstra <peterz@infradead.org> | 2014-04-23 20:28:37 +0200 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2015-07-27 14:06:23 +0200 |
| commit | 7fc1845dd45a825b3c2b760df342a94f61fb1113 (patch) | |
| tree | beac8c005d76389fbba5d251cc5774e9428c3ecb /arch/x86/include/asm/atomic64_64.h | |
| parent | ae8c35c85be92b79c545c57c2a14c2f8136d3353 (diff) | |
| download | lwn-7fc1845dd45a825b3c2b760df342a94f61fb1113.tar.gz lwn-7fc1845dd45a825b3c2b760df342a94f61fb1113.zip | |
x86: Provide atomic_{or,xor,and}
Implement atomic logic ops -- atomic_{or,xor,and}.
These will replace the atomic_{set,clear}_mask functions that are
available on some archs.
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'arch/x86/include/asm/atomic64_64.h')
| -rw-r--r-- | arch/x86/include/asm/atomic64_64.h | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/arch/x86/include/asm/atomic64_64.h b/arch/x86/include/asm/atomic64_64.h index b965f9e03f2a..50e33eff58de 100644 --- a/arch/x86/include/asm/atomic64_64.h +++ b/arch/x86/include/asm/atomic64_64.h @@ -220,4 +220,19 @@ static inline long atomic64_dec_if_positive(atomic64_t *v) return dec; } +#define ATOMIC64_OP(op) \ +static inline void atomic64_##op(long i, atomic64_t *v) \ +{ \ + asm volatile(LOCK_PREFIX #op"q %1,%0" \ + : "+m" (v->counter) \ + : "er" (i) \ + : "memory"); \ +} + +ATOMIC64_OP(and) +ATOMIC64_OP(or) +ATOMIC64_OP(xor) + +#undef ATOMIC64_OP + #endif /* _ASM_X86_ATOMIC64_64_H */ |