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atomic: Allow atomic_inc_not_zero to be overridden

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We want to implement a ppc64 specific version of atomic_inc_not_zero
so wrap it in an ifdef to allow it to be overridden.

Signed-off-by: Anton Blanchard <anton@samba.org>
Acked-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
Anton Blanchard 2012-02-29 21:09:53 +00:00 committed by Benjamin Herrenschmidt
parent 6c15d7afbb
commit b1ada6010e
1 changed files with 2 additions and 0 deletions
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include/linux/atomic.h
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@ -24,7 +24,9 @@ static inline int atomic_add_unless(atomic_t *v, int a, int u)
* Atomically increments @v by 1, so long as @v is non-zero.
* Returns non-zero if @v was non-zero, and zero otherwise.
*/
#ifndef atomic_inc_not_zero
#define atomic_inc_not_zero(v) atomic_add_unless((v), 1, 0)
#endif
/**
* atomic_inc_not_zero_hint - increment if not null