(unsigned long long)btrfs_super_log_root(sb),
(unsigned)btrfs_super_log_root_level(sb));
trans = btrfs_start_transaction(root, 1);
+ BUG_ON(IS_ERR(trans));
btrfs_set_super_log_root(sb, 0);
btrfs_set_super_log_root_level(sb, 0);
btrfs_commit_transaction(trans, root);