diff options
author | Nick Piggin <npiggin@suse.de> | 2006-03-22 08:08:40 (GMT) |
---|---|---|
committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-03-22 15:54:02 (GMT) |
commit | 7835e98b2e3c66dba79cb0ff8ebb90a2fe030c29 (patch) | |
tree | 405a96eade34845dabe2f125b6c5eb095846869d /include/linux/mm.h | |
parent | 70dc991d66cac40fdb07346dba2b5d862d732c34 (diff) | |
download | linux-fsl-qoriq-7835e98b2e3c66dba79cb0ff8ebb90a2fe030c29.tar.xz |
[PATCH] remove set_page_count() outside mm/
set_page_count usage outside mm/ is limited to setting the refcount to 1.
Remove set_page_count from outside mm/, and replace those users with
init_page_count() and set_page_refcounted().
This allows more debug checking, and tighter control on how code is allowed
to play around with page->_count.
Signed-off-by: Nick Piggin <npiggin@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include/linux/mm.h')
-rw-r--r-- | include/linux/mm.h | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/include/linux/mm.h b/include/linux/mm.h index 3d84b7a..7d8c127 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -307,8 +307,6 @@ static inline int get_page_unless_zero(struct page *page) return atomic_inc_not_zero(&page->_count); } -#define set_page_count(p,v) atomic_set(&(p)->_count, (v)) - extern void FASTCALL(__page_cache_release(struct page *)); static inline int page_count(struct page *page) @@ -325,6 +323,15 @@ static inline void get_page(struct page *page) atomic_inc(&page->_count); } +/* + * Setup the page count before being freed into the page allocator for + * the first time (boot or memory hotplug) + */ +static inline void init_page_count(struct page *page) +{ + atomic_set(&page->_count, 1); +} + void put_page(struct page *page); void split_page(struct page *page, unsigned int order); |