JFS: Fix typo in last patch

Signed-off-by: Dave Kleikamp <shaggy@austin.ibm.com>
diff --git a/fs/jfs/jfs_metapage.c b/fs/jfs/jfs_metapage.c
index 02add5d..13d7e3f 100644
--- a/fs/jfs/jfs_metapage.c
+++ b/fs/jfs/jfs_metapage.c
@@ -640,7 +640,7 @@
 	} else {
 		page = read_cache_page(mapping, page_index,
 			    (filler_t *)mapping->a_ops->readpage, NULL);
-		if (IS_ERR(page) || !PageUptodate(mp->page)) {
+		if (IS_ERR(page) || !PageUptodate(page)) {
 			jfs_err("read_cache_page failed!");
 			return NULL;
 		}