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[PATCH] mutex subsystem, add atomic_xchg() to all arches

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add atomic_xchg() to all the architectures. Needed by the new mutex code.

Signed-off-by: Ingo Molnar <[email protected]>
Signed-off-by: Arjan van de Ven <[email protected]>
This commit is contained in:
Ingo Molnar 2006-01-09 15:59:17 -08:00 • committed by Ingo Molnar
commit ffbf670f5c
22 changed files with 30 additions and 0 deletions
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include/asm-m32r/atomic.h
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@ -243,6 +243,7 @@ static __inline__ int atomic_dec_return(atomic_t *v)
#define atomic_add_negative(i,v) (atomic_add_return((i), (v)) < 0)
#define atomic_cmpxchg(v, o, n) ((int)cmpxchg(&((v)->counter), (o), (n)))
#define atomic_xchg(v, new) (xchg(&((v)->counter), new))
/**
* atomic_add_unless - add unless the number is a given value