jfs: Add missing NULL pointer check in __get_metapage

alloc_metapage can return a NULL pointer so check for that.

Signed-off-by: Juerg Haefliger <juerg.haefliger@canonical.com>
Signed-off-by: Dave Kleikamp <dave.kleikamp@oracle.com>

diff --git a/fs/jfs/jfs_metapage.c b/fs/jfs/jfs_metapage.c
index 1c4b9ad..1a3b0cc 100644 (file)
--- a/fs/jfs/jfs_metapage.c
+++ b/fs/jfs/jfs_metapage.c
@@ -663,6 +663,8 @@ struct metapage *__get_metapage(struct inode *inode, unsigned long lblock,
        } else {
                INCREMENT(mpStat.pagealloc);
                mp = alloc_metapage(GFP_NOFS);
+               if (!mp)
+                       goto unlock;
                mp->page = page;
                mp->sb = inode->i_sb;
                mp->flag = 0;