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authorAnton Blanchard <anton@samba.org>2012-03-01 01:09:53 +0400
committerBenjamin Herrenschmidt <benh@kernel.crashing.org>2012-03-07 10:06:08 +0400
commitb1ada6010e234d6c53bfcd5a617610c9284846b8 (patch)
tree158a68c8c224e3333f4e786764656e6d18c6d965 /include/linux/atomic.h
parent6c15d7afbb2f9e2d3114b513306dae736b56f535 (diff)
downloadlinux-b1ada6010e234d6c53bfcd5a617610c9284846b8.tar.xz
atomic: Allow atomic_inc_not_zero to be overridden
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>
Diffstat (limited to 'include/linux/atomic.h')
-rw-r--r--include/linux/atomic.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/atomic.h b/include/linux/atomic.h
index 42b77b5446d2..70cfcb2d63c4 100644
--- a/include/linux/atomic.h
+++ b/include/linux/atomic.h
@@ -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