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| 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_32.h | |
| parent | ae8c35c85be92b79c545c57c2a14c2f8136d3353 (diff) | |
| download | linux-0-day-7fc1845dd45a825b3c2b760df342a94f61fb1113.tar.gz linux-0-day-7fc1845dd45a825b3c2b760df342a94f61fb1113.tar.xz | |
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_32.h')
| -rw-r--r-- | arch/x86/include/asm/atomic64_32.h | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/arch/x86/include/asm/atomic64_32.h b/arch/x86/include/asm/atomic64_32.h index b154de75c90cb..a11c30b77fb57 100644 --- a/arch/x86/include/asm/atomic64_32.h +++ b/arch/x86/include/asm/atomic64_32.h @@ -313,4 +313,18 @@ static inline long long atomic64_dec_if_positive(atomic64_t *v) #undef alternative_atomic64 #undef __alternative_atomic64 +#define ATOMIC64_OP(op, c_op) \ +static inline void atomic64_##op(long long i, atomic64_t *v) \ +{ \ + long long old, c = 0; \ + while ((old = atomic64_cmpxchg(v, c, c c_op i)) != c) \ + c = old; \ +} + +ATOMIC64_OP(and, &) +ATOMIC64_OP(or, |) +ATOMIC64_OP(xor, ^) + +#undef ATOMIC64_OP + #endif /* _ASM_X86_ATOMIC64_32_H */ |