ref_uiter        1907 fs/btrfs/backref.c 	struct ulist_iterator ref_uiter;
ref_uiter        1934 fs/btrfs/backref.c 	ULIST_ITER_INIT(&ref_uiter);
ref_uiter        1935 fs/btrfs/backref.c 	while (!ret && (ref_node = ulist_next(refs, &ref_uiter))) {