From 60063497a95e716c9a689af3be2687d261f115b4 Mon Sep 17 00:00:00 2001
From: Arun Sharma <asharma@fb.com>
Date: Tue, 26 Jul 2011 16:09:06 -0700
Subject: atomic: use <linux/atomic.h>

This allows us to move duplicated code in <asm/atomic.h>
(atomic_inc_not_zero() for now) to <linux/atomic.h>

Signed-off-by: Arun Sharma <asharma@fb.com>
Reviewed-by: Eric Dumazet <eric.dumazet@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: David Miller <davem@davemloft.net>
Cc: Eric Dumazet <eric.dumazet@gmail.com>
Acked-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 include/linux/atomic.h | 9 +++++++++
 1 file changed, 9 insertions(+)

(limited to 'include/linux/atomic.h')

diff --git a/include/linux/atomic.h b/include/linux/atomic.h
index bc6615d4132b..66fed6364122 100644
--- a/include/linux/atomic.h
+++ b/include/linux/atomic.h
@@ -2,6 +2,15 @@
 #define _LINUX_ATOMIC_H
 #include <asm/atomic.h>
 
+/**
+ * atomic_inc_not_zero - increment unless the number is zero
+ * @v: pointer of type atomic_t
+ *
+ * Atomically increments @v by 1, so long as @v is non-zero.
+ * Returns non-zero if @v was non-zero, and zero otherwise.
+ */
+#define atomic_inc_not_zero(v)		atomic_add_unless((v), 1, 0)
+
 /**
  * atomic_inc_not_zero_hint - increment if not null
  * @v: pointer of type atomic_t
-- 
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