From ae1276b9349a2fd9c3afb4651e25a77ac03299d9 Mon Sep 17 00:00:00 2001
From: Qi Yong <qiyong@fc-cn.com>
Date: Mon, 4 Feb 2008 22:29:27 -0800
Subject: [PATCH] set_page_refcounted() VM_BUG_ON fix
The current PageTail semantic is that a PageTail page is first a
PageCompound page. So remove the redundant PageCompound test in
set_page_refcounted().
Signed-off-by: Qi Yong <qiyong@fc-cn.com>
Cc: Christoph Lameter <clameter@sgi.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
mm/internal.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/mm/internal.h b/mm/internal.h
index 1e34d2462a48..5a9a6200e034 100644
--- a/mm/internal.h
+++ b/mm/internal.h
@@ -24,7 +24,7 @@ static inline void set_page_count(struct page *page, int v)
*/
static inline void set_page_refcounted(struct page *page)
{
- VM_BUG_ON(PageCompound(page) && PageTail(page));
+ VM_BUG_ON(PageTail(page));
VM_BUG_ON(atomic_read(&page->_count));
set_page_count(page, 1);
}
--
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