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| author |   Ingo Molnar <mingo@elte.hu> | 2006-01-09 15:59:17 -0800 |
|---|---|---|
| committer |   Ingo Molnar <mingo@hera.kernel.org> | 2006-01-09 15:59:17 -0800 |
| commit | ffbf670f5cd50501a34a5187981460da2216071e (patch) | |
| tree | f2cd9eeeb59839d15feddf906310bb375474c573 /include/asm-x86_64/atomic.h | |
| parent | Merge master.kernel.org:/pub/scm/linux/kernel/git/mchehab/v4l-dvb (diff) | |
| download | linux-dev-ffbf670f5cd50501a34a5187981460da2216071e.tar.xz linux-dev-ffbf670f5cd50501a34a5187981460da2216071e.zip | |
[PATCH] mutex subsystem, add atomic_xchg() to all arches
add atomic_xchg() to all the architectures. Needed by the new mutex code.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Arjan van de Ven <arjan@infradead.org>
Diffstat (limited to 'include/asm-x86_64/atomic.h')
| -rw-r--r-- | include/asm-x86_64/atomic.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/asm-x86_64/atomic.h b/include/asm-x86_64/atomic.h index 72eb071488c7..6b540237a2f8 100644 --- a/include/asm-x86_64/atomic.h +++ b/include/asm-x86_64/atomic.h @@ -389,6 +389,7 @@ static __inline__ long atomic64_sub_return(long i, atomic64_t *v) #define atomic64_dec_return(v) (atomic64_sub_return(1,v)) #define atomic_cmpxchg(v, old, new) ((int)cmpxchg(&((v)->counter), old, new)) +#define atomic_xchg(v, new) (xchg(&((v)->counter), new)) /** * atomic_add_unless - add unless the number is a given value |