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authorMel Gorman <mel@csn.ul.ie>2007-10-16 01:26:10 -0700
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-10-16 09:43:01 -0700
commit48f13bf3e742fca8aab87f6c39451d03bf5952d4 (patch)
tree668160019ab157500a90655cf44f798ed3c77893 /mm/page_alloc.c
parentea3061d227816d00717446ac12b853d7ae04b4fe (diff)
downloadlwn-48f13bf3e742fca8aab87f6c39451d03bf5952d4.tar.gz
lwn-48f13bf3e742fca8aab87f6c39451d03bf5952d4.zip
Breakout page_order() to internal.h to avoid special knowledge of the buddy allocator
The statistics patch later needs to know what order a free page is on the free lists. Rather than having special knowledge of page_private() when PageBuddy() is set, this patch places out page_order() in internal.h and adds a VM_BUG_ON to catch using it on non-PageBuddy pages. Signed-off-by: Mel Gorman <mel@csn.ul.ie> Signed-off-by: Christoph Lameter <clameter@sgi.com> Acked-by: Andy Whitcroft <apw@shadowen.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/page_alloc.c')
-rw-r--r--mm/page_alloc.c10
1 files changed, 0 insertions, 10 deletions
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index a8a53f879dfe..71ced519c31c 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -313,16 +313,6 @@ static inline void prep_zero_page(struct page *page, int order, gfp_t gfp_flags)
clear_highpage(page + i);
}
-/*
- * function for dealing with page's order in buddy system.
- * zone->lock is already acquired when we use these.
- * So, we don't need atomic page->flags operations here.
- */
-static inline unsigned long page_order(struct page *page)
-{
- return page_private(page);
-}
-
static inline void set_page_order(struct page *page, int order)
{
set_page_private(page, order);