for_each_btree_key_commit(trans, iter,
BTREE_ID_backpointers, POS_MIN, 0, k,
NULL, NULL, BCH_TRANS_COMMIT_no_enospc,
bch2_check_btree_backpointer(trans, &iter, k)));
for_each_btree_key_commit(trans, iter,
BTREE_ID_backpointers, POS_MIN, 0, k,
NULL, NULL, BCH_TRANS_COMMIT_no_enospc,
bch2_check_btree_backpointer(trans, &iter, k)));