diff options
| author | Nick Piggin <npiggin@suse.de> | 2006-03-22 00:08:33 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-03-22 07:54:01 -0800 |
| commit | 0f8053a509ceba4a077a50ea7b77039b5559b428 (patch) | |
| tree | 5a66021540395e20256f38a3a45174617428a832 | |
| parent | 4fa4f53bf92139595cae6f1a3d972fc0a3451d29 (diff) | |
| download | lwn-0f8053a509ceba4a077a50ea7b77039b5559b428.tar.gz lwn-0f8053a509ceba4a077a50ea7b77039b5559b428.zip | |
[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: 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.h | 1 | ||||
| -rw-r--r-- | mm/filemap.c | 2 | ||||
| -rw-r--r-- | mm/internal.h | 11 | ||||
| -rw-r--r-- | mm/vmscan.c | 2 |
4 files changed, 15 insertions, 1 deletions
diff --git a/include/linux/mm.h b/include/linux/mm.h index 1850cf8bad64..9b3cdfc8046d 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -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 *)); diff --git a/mm/filemap.c b/mm/filemap.c index 44da3d476994..e8f58f7dd7a5 100644 --- a/mm/filemap.c +++ b/mm/filemap.c @@ -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 */ diff --git a/mm/internal.h b/mm/internal.h index 17256bb2f4ef..e3042db2a2d6 100644 --- a/mm/internal.h +++ b/mm/internal.h @@ -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 diff --git a/mm/vmscan.c b/mm/vmscan.c index 486184d2b50c..3914a94aa905 100644 --- a/mm/vmscan.c +++ b/mm/vmscan.c @@ -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 */ |