[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>
diff --git a/mm/internal.h b/mm/internal.h
index 17256bb..e3042db 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 @@
#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