--- linux/fs/reiserfs/super.c.orig	Mon Jan 28 09:57:26 2002
+++ linux/fs/reiserfs/super.c	Mon Jan 28 10:10:08 2002
@@ -690,8 +690,18 @@
 	       "It must not be of this format type.\n", bh->b_blocknr) ;
 	return 1 ;
     }
+
+    if ( rs->s_root_block == -1 ) {
+	brelse(bh) ;
+	printk("dev %s: Unfinished reiserfsck --rebuild-tree run detected. Please run\n"
+	       "reiserfsck --rebuild-tree and wait for a completion. If that fails\n"
+	       "get newer reiserfsprogs package\n", kdevname (s->s_dev));
+	return 1;
+    }
+
     SB_BUFFER_WITH_SB (s) = bh;
     SB_DISK_SUPER_BLOCK (s) = rs;
+
     s->s_op = &reiserfs_sops;
 
     /* new format is limited by the 32 bit wide i_blocks field, want to