Commit 77a8a788 authored by Nick Piggin's avatar Nick Piggin Committed by Linus Torvalds
Browse files

[PATCH] mm: set_page_refs opt 



Inline set_page_refs.

Signed-off-by: default avatarNick Piggin <npiggin@suse.de>
Cc: Hugh Dickins <hugh@veritas.com>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent c54ad30c

mm/internal.h

+17 −2
Original line number Diff line number Diff line
@@ -9,5 +9,20 @@ 
 * 2 of the License, or (at your option) any later version.

 */



/* page_alloc.c */

extern void set_page_refs(struct page *page, int order);
 
static inline void set_page_refs(struct page *page, int order)

{

#ifdef CONFIG_MMU

	set_page_count(page, 1);

#else

	int i;



	/*

	 * We need to reference all the pages for this order, otherwise if

	 * anyone accesses one of the pages with (get/put) it will be freed.

	 * - eg: access_process_vm()

	 */

	for (i = 0; i < (1 << order); i++)

		set_page_count(page + i, 1);

#endif /* CONFIG_MMU */

}

mm/page_alloc.c

+0 −17
Original line number Diff line number Diff line
@@ -453,23 +453,6 @@ expand(struct zone *zone, struct page *page, 
	return page;

}



void set_page_refs(struct page *page, int order)

{

#ifdef CONFIG_MMU

	set_page_count(page, 1);

#else

	int i;



	/*

	 * We need to reference all the pages for this order, otherwise if

	 * anyone accesses one of the pages with (get/put) it will be freed.

	 * - eg: access_process_vm()

	 */

	for (i = 0; i < (1 << order); i++)

		set_page_count(page + i, 1);

#endif /* CONFIG_MMU */

}



/*

 * This page is about to be returned from the page allocator

 */