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authorIngo Molnar <mingo@elte.hu>2006-01-09 18:59:17 -0500
committerIngo Molnar <mingo@hera.kernel.org>2006-01-09 18:59:17 -0500
commitffbf670f5cd50501a34a5187981460da2216071e (patch)
treef2cd9eeeb59839d15feddf906310bb375474c573 /include/asm-s390
parentf17578decc40df8fceff82b106582e30bdfb3189 (diff)
[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.h2
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)
75 __CS_LOOP(v, mask, "or"); 75 __CS_LOOP(v, mask, "or");
76} 76}
77 77
78#define atomic_xchg(v, new) (xchg(&((v)->counter), new))
79
78static __inline__ int atomic_cmpxchg(atomic_t *v, int old, int new) 80static __inline__ int atomic_cmpxchg(atomic_t *v, int old, int new)
79{ 81{
80 __asm__ __volatile__(" cs %0,%3,0(%2)\n" 82 __asm__ __volatile__(" cs %0,%3,0(%2)\n"