Commit 0f8053a5 authored by Nick Piggin's avatar Nick Piggin Committed by Linus Torvalds

[PATCH] mm: make __put_page internal

Remove __put_page from outside the core mm/.  It is dangerous because it does
not handle compound pages nicely, and misses 1->0 transitions.  If a user
later appears that really needs the extra speed we can reevaluate.
Signed-off-by: default avatarNick Piggin <npiggin@suse.de>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent 4fa4f53b
......@@ -308,7 +308,6 @@ static inline int get_page_unless_zero(struct page *page)
}
#define set_page_count(p,v) atomic_set(&(p)->_count, (v))
#define __put_page(p) atomic_dec(&(p)->_count)
extern void FASTCALL(__page_cache_release(struct page *));
......
......@@ -30,6 +30,8 @@
#include <linux/security.h>
#include <linux/syscalls.h>
#include "filemap.h"
#include "internal.h"
/*
* FIXME: remove all knowledge of the buffer layer from the core VM
*/
......
......@@ -8,6 +8,10 @@
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*/
#ifndef __MM_INTERNAL_H
#define __MM_INTERNAL_H
#include <linux/mm.h>
static inline void set_page_refs(struct page *page, int order)
{
......@@ -26,5 +30,12 @@ static inline void set_page_refs(struct page *page, int order)
#endif /* CONFIG_MMU */
}
static inline void __put_page(struct page *page)
{
atomic_dec(&page->_count);
}
extern void fastcall __init __free_pages_bootmem(struct page *page,
unsigned int order);
#endif
......@@ -39,6 +39,8 @@
#include <linux/swapops.h>
#include "internal.h"
/* possible outcome of pageout() */
typedef enum {
/* failed to write page out, page is locked */
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment