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authorNick Piggin <npiggin@suse.de>2006-03-22 00:08:43 -0800
committerLinus Torvalds <torvalds@g5.osdl.org>2006-03-22 07:54:02 -0800
commit617d2214ee06c209e5c375c280d50abace8058e1 (patch)
treedd2fbf4a2cfa9854ebf27e6f100608c8a0507850
parentb7ab795b7bec9997d4fde39f249d52823d36d98d (diff)
[PATCH] mm: optimise page_count
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>
-rw-r--r--include/linux/mm.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/include/linux/mm.h b/include/linux/mm.h
index 7d8c127daad7..6aa016f1d3ae 100644
--- 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);
}