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authorNick Piggin <npiggin@suse.de>2006-03-22 00:08:40 -0800
committerLinus Torvalds <torvalds@g5.osdl.org>2006-03-22 07:54:02 -0800
commit7835e98b2e3c66dba79cb0ff8ebb90a2fe030c29 (patch)
tree405a96eade34845dabe2f125b6c5eb095846869d /include/linux/mm.h
parent70dc991d66cac40fdb07346dba2b5d862d732c34 (diff)
[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.h11
1 files changed, 9 insertions, 2 deletions
diff --git a/include/linux/mm.h b/include/linux/mm.h
index 3d84b7a35e0..7d8c127daad 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);