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[PATCH] mm: make __put_page internal

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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: Nick Piggin <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Nick Piggin 2006-03-22 00:08:33 -08:00 • committed by Linus Torvalds
commit 0f8053a509
4 changed files with 15 additions and 1 deletions
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2
mm/filemap.c
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@ -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
*/

11
mm/internal.h
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@ -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

2
mm/vmscan.c
View file

@ -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 */