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[PATCH] mm: optimise page_count

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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>
This commit is contained in:
Nick Piggin 2006-03-22 00:08:43 -08:00 • committed by Linus Torvalds
parent b7ab795b7b
commit 617d2214ee
1 changed files with 1 additions and 1 deletions
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2
include/linux/mm.h
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@ -311,7 +311,7 @@ extern void FASTCALL(__page_cache_release(struct page *));
static inline int page_count(struct page *page) static inline int page_count(struct page *page)
{ {
if (PageCompound(page)) if (unlikely(PageCompound(page)))
page = (struct page *)page_private(page); page = (struct page *)page_private(page);
return atomic_read(&page->_count); return atomic_read(&page->_count);
} }