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[PATCH] mm: optimise page_count
author
Nick Piggin
<npiggin@suse.de>
Wed, 22 Mar 2006 08:08:43 +0000
(
00:08
-0800)
committer
Linus Torvalds
<torvalds@g5.osdl.org>
Wed, 22 Mar 2006 15:54:02 +0000
(07:54 -0800)
Optimise page_count compound page test and make it consistent with similar
functions.
Signed-off-by: Nick Piggin <npiggin@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
include/linux/mm.h
patch
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diff --git
a/include/linux/mm.h
b/include/linux/mm.h
index
7d8c127
..
6aa016f
100644
(file)
--- a/
include/linux/mm.h
+++ b/
include/linux/mm.h
@@
-311,7
+311,7
@@
extern void FASTCALL(__page_cache_release(struct page *));
static inline int page_count(struct page *page)
{
- if (
PageCompound(page
))
+ if (
unlikely(PageCompound(page)
))
page = (struct page *)page_private(page);
return atomic_read(&page->_count);
}