Subject: [PATCH 1/2] atomic: Allow atomic_inc_not_zero to be overridden

From: Anton Blanchard <[email-masked]>
Date: Thu, 1 Mar 2012 18:09:53 +1100

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 <[email-masked]>
---

Index: linux-build/include/linux/atomic.h
===================================================================
--- linux-build.orig/include/linux/atomic.h	2012-02-11 14:59:23.284714257 +1100
+++ linux-build/include/linux/atomic.h	2012-02-11 15:01:14.894764555 +1100
@@ -24,7 +24,9 @@ static inline int atomic_add_unless(atom
  * 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