From: Nick Piggin <nickpiggin@yahoo.com.au>
Date: Tue, 8 Jan 2008 07:20:27 +0000 (-0800)
Subject: Use non atomic unlock
X-Git-Tag: v2.6.25-rc1~284^2~1
X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=a76d354629ea46c449705970a2c0b9e9090d6f03;p=linux-2.6

Use non atomic unlock

Slub can use the non-atomic version to unlock because other flags will not
get modified with the lock held.

Signed-off-by: Nick Piggin <npiggin@suse.de>
Acked-by: Christoph Lameter <clameter@sgi.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

diff --git a/mm/slub.c b/mm/slub.c
index ac836d31e3..bccfb6a178 100644
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -1219,7 +1219,7 @@ static __always_inline void slab_lock(struct page *page)
 
 static __always_inline void slab_unlock(struct page *page)
 {
-	bit_spin_unlock(PG_locked, &page->flags);
+	__bit_spin_unlock(PG_locked, &page->flags);
 }
 
 static __always_inline int slab_trylock(struct page *page)