--- linux-2.4.20/fs/ext3/super.c.org	Wed Dec  4 14:34:24 2002
+++ linux-2.4.20/fs/ext3/super.c	Wed Dec  4 14:39:04 2002
@@ -1641,7 +1641,7 @@
 	sb->s_dirt = 0;
 	target = log_start_commit(EXT3_SB(sb)->s_journal, NULL);
 
-	if (do_sync_supers) {
+	if (do_sync_supers || !sb->s_root) {
 		unlock_super(sb);
 		log_wait_commit(EXT3_SB(sb)->s_journal, target);
 		lock_super(sb);