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| author | Ingo Molnar <mingo@elte.hu> | 2006-01-10 02:59:17 +0300 |
|---|---|---|
| committer | Ingo Molnar <mingo@hera.kernel.org> | 2006-01-10 02:59:17 +0300 |
| commit | ffbf670f5cd50501a34a5187981460da2216071e (patch) | |
| tree | f2cd9eeeb59839d15feddf906310bb375474c573 /include/asm-s390 | |
| parent | f17578decc40df8fceff82b106582e30bdfb3189 (diff) | |
| download | linux-ffbf670f5cd50501a34a5187981460da2216071e.tar.xz | |
[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-s390')
| -rw-r--r-- | include/asm-s390/atomic.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/asm-s390/atomic.h b/include/asm-s390/atomic.h index d82aedf616fe..be6fefe223d6 100644 --- a/include/asm-s390/atomic.h +++ b/include/asm-s390/atomic.h @@ -75,6 +75,8 @@ static __inline__ void atomic_set_mask(unsigned long mask, atomic_t * v) __CS_LOOP(v, mask, "or"); } +#define atomic_xchg(v, new) (xchg(&((v)->counter), new)) + static __inline__ int atomic_cmpxchg(atomic_t *v, int old, int new) { __asm__ __volatile__(" cs %0,%3,0(%2)\n" |