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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-sparc | |
| parent | f17578decc40df8fceff82b106582e30bdfb3189 (diff) | |
| download | lwn-ffbf670f5cd50501a34a5187981460da2216071e.tar.gz lwn-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-sparc')
| -rw-r--r-- | include/asm-sparc/atomic.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/asm-sparc/atomic.h b/include/asm-sparc/atomic.h index accb4967e9d2..e1033170bd3a 100644 --- a/include/asm-sparc/atomic.h +++ b/include/asm-sparc/atomic.h @@ -20,6 +20,7 @@ typedef struct { volatile int counter; } atomic_t; extern int __atomic_add_return(int, atomic_t *); extern int atomic_cmpxchg(atomic_t *, int, int); +#define atomic_xchg(v, new) (xchg(&((v)->counter), new)) extern int atomic_add_unless(atomic_t *, int, int); extern void atomic_set(atomic_t *, int); |