dr_del_mlist_query
rv = ml ? dr_del_mlist_query(ml, &mq) : -1;
rv = dr_del_mlist_query(ml, &mq);
rv = dr_del_mlist_query(t_ml, &mq);
rv = ml ? dr_del_mlist_query(ml, &mq) : -1;
static int dr_del_mlist_query(struct memlist *mlist,