From: Qi Yong <qiyong@fc-cn.com>
Date: Tue, 5 Feb 2008 06:29:27 +0000 (-0800)
Subject: set_page_refcounted() VM_BUG_ON fix
X-Git-Tag: v2.6.25-rc1~929
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=ae1276b9349a2fd9c3afb4651e25a77ac03299d9;p=karo-tx-linux.git

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>
---

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);
 }