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logfs: check for the return value after calling find_or_create_page()

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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]>
Cc: Jörn Engel <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Younger Liu 2014-01-23 15:53:47 -08:00 • committed by Linus Torvalds
commit 2252b62a56
1 changed files with 2 additions and 1 deletions
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3
fs/logfs/segment.c
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@ -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;
}