Btrfs: Change the super to point to a tree of trees to enable persistent snapshots

Signed-off-by: Chris Mason <chris.mason@oracle.com>
diff --git a/fs/btrfs/debug-tree.c b/fs/btrfs/debug-tree.c
index 6da0a7a..de45fb4 100644
--- a/fs/btrfs/debug-tree.c
+++ b/fs/btrfs/debug-tree.c
@@ -11,9 +11,11 @@
 	struct btrfs_root *root;
 	radix_tree_init();
 	root = open_ctree("dbfile", &super);
-	printf("root tree\n");
+	printf("fs tree\n");
 	btrfs_print_tree(root, root->node);
 	printf("map tree\n");
 	btrfs_print_tree(root->extent_root, root->extent_root->node);
+	printf("root tree\n");
+	btrfs_print_tree(root->tree_root, root->tree_root->node);
 	return 0;
 }