From: Christoph Lameter <clameter@sgi.com>
Subject: Compound pages: Stricter check in __free_one_page()

The page passed to destroy_compound_page() must be the head page.
It is therefore possible to just check for the head page. Tail pages
will make the flag check in __free

Signed-off-by: Christoph Lameter <clameter@sgi.com>

---
 mm/page_alloc.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Index: linux-2.6.25-rc5-mm1/mm/page_alloc.c
===================================================================
--- linux-2.6.25-rc5-mm1.orig/mm/page_alloc.c	2008-03-26 20:10:58.426668421 -0700
+++ linux-2.6.25-rc5-mm1/mm/page_alloc.c	2008-03-26 20:17:26.510418980 -0700
@@ -443,7 +443,7 @@ static inline void __free_one_page(struc
 	int order_size = 1 << order;
 	int migratetype = get_pageblock_migratetype(page);
 
-	if (unlikely(PageCompound(page)))
+	if (unlikely(PageHead(page)))
 		destroy_compound_page(page, order);
 
 	page_idx = page_to_pfn(page) & ((1 << MAX_ORDER) - 1);