From: Eric Wong <normalperson@yhbt.net>
Date: Tue, 30 Apr 2013 22:27:43 +0000 (-0700)
Subject: epoll: cleanup: use RCU_INIT_POINTER when nulling
X-Git-Tag: v3.12-rc1~951^2~65
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=d6d67e7231c97d535069970c840d33fc6c4350ee;p=kernel%2Fkernel-generic.git

epoll: cleanup: use RCU_INIT_POINTER when nulling

It is always safe to use RCU_INIT_POINTER to NULL a pointer.  This results
in slightly smaller/faster code.

Signed-off-by: Eric Wong <normalperson@yhbt.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

diff --git a/fs/eventpoll.c b/fs/eventpoll.c
index c5d9880..277cc38 100644
--- a/fs/eventpoll.c
+++ b/fs/eventpoll.c
@@ -1213,7 +1213,7 @@ static noinline void ep_destroy_wakeup_source(struct epitem *epi)
 {
 	struct wakeup_source *ws = ep_wakeup_source(epi);
 
-	rcu_assign_pointer(epi->ws, NULL);
+	RCU_INIT_POINTER(epi->ws, NULL);
 
 	/*
 	 * wait for ep_pm_stay_awake_rcu to finish, synchronize_rcu is