From: Younger Liu <[email protected]>

  In get_mapping_page(), after calling find_or_create_page(),
the return value should be checked.

  This patch has been provided:
http://www.spinics.net/lists/linux-fsdevel/msg66948.html
but not been applied now.

Signed-off-by: Younger Liu <[email protected]>
Cc: Younger Liu <[email protected]>
Cc: Vyacheslav Dubeyko <[email protected]>
Reviewed-by: Prasad Joshi <[email protected]>
---
 fs/logfs/segment.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/fs/logfs/segment.c b/fs/logfs/segment.c
index d448a77..7f9b096 100644
--- a/fs/logfs/segment.c
+++ b/fs/logfs/segment.c
@@ -62,7 +62,8 @@ static struct page *get_mapping_page(struct
super_block *sb, pgoff_t index,
                page = read_cache_page(mapping, index, filler, sb);
        else {
                page = find_or_create_page(mapping, index, GFP_NOFS);
-               unlock_page(page);
+               if (page)
+                       unlock_page(page);
        }
        return page;
 }
-- 
1.7.9.5

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