Commit 617d2214 authored Mar 22, 2006 by Nicholas Piggin Committed by Linus Torvalds Mar 22, 2006

[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>

parent b7ab795b

include/linux/mm.h

+1 −1

Original line number	Diff line number	Diff line
		@@ -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);
		}