Use non atomic unlock
Nick Piggin [Tue, 8 Jan 2008 07:20:27 +0000 (23:20 -0800)]
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>

mm/slub.c

index ac836d3..bccfb6a 100644 (file)
--- 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)