[RBTREE] Update ext3 to use rb_parent() accessor macro.

Signed-off-by: David Woodhouse <dwmw2@infradead.org>
diff --git a/fs/ext3/dir.c b/fs/ext3/dir.c
index f37528e..fbb0d4e 100644
--- a/fs/ext3/dir.c
+++ b/fs/ext3/dir.c
@@ -284,7 +284,7 @@
 		 * beginning of the loop and try to free the parent
 		 * node.
 		 */
-		parent = n->rb_parent;
+		parent = rb_parent(n);
 		fname = rb_entry(n, struct fname, rb_hash);
 		while (fname) {
 			struct fname * old = fname;