--- fs/btrfs/disk-io.c

+++ fs/btrfs/disk-io.c

@@ -1145,8 +1145,10 @@ struct btrfs_root *btrfs_read_fs_root_no

root->commit_root = btrfs_root_node(root);

BUG_ON(!root->node);

out:

- if (location->objectid != BTRFS_TREE_LOG_OBJECTID)

+ if (location->objectid != BTRFS_TREE_LOG_OBJECTID) {

root->ref_cows = 1;

+ btrfs_check_and_init_root_item(&root->root_item);

+ }

return root;

}