From c3f0da631539b3b8e17f6dda567af9958d49d14f Mon Sep 17 00:00:00 2001
From: Bob Liu <lliubbo@gmail.com>
Date: Thu, 13 Jan 2011 15:45:49 -0800
Subject: [PATCH] mm/page-writeback.c: fix __set_page_dirty_no_writeback()
 return value

__set_page_dirty_no_writeback() should return true if it actually
transitioned the page from a clean to dirty state although it seems nobody
uses its return value at present.

Signed-off-by: Bob Liu <lliubbo@gmail.com>
Acked-by: Wu Fengguang <fengguang.wu@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 mm/page-writeback.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/page-writeback.c b/mm/page-writeback.c
index b5d8a1f820a0..28763b8bdbdd 100644
--- a/mm/page-writeback.c
+++ b/mm/page-writeback.c
@@ -1103,7 +1103,7 @@ EXPORT_SYMBOL(write_one_page);
 int __set_page_dirty_no_writeback(struct page *page)
 {
 	if (!PageDirty(page))
-		SetPageDirty(page);
+		return !TestSetPageDirty(page);
 	return 0;
 }
 
-- 
2.39.5