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>
diff --git a/include/linux/atomic.h b/include/linux/atomic.h
index 42b77b5..70cfcb2 100644
--- a/include/linux/atomic.h
+++ b/include/linux/atomic.h
@@ -24,7 +24,9 @@
* 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