schedule_erase
return schedule_erase(ubi, e, vol_id, lnum, torture, true);
err1 = schedule_erase(ubi, e, vol_id, lnum, 0, true);
err = schedule_erase(ubi, e, vol_id, lnum, torture, false);
err = schedule_erase(ubi, e, UBI_UNKNOWN, UBI_UNKNOWN,
err = schedule_erase(ubi, e, aeb->vol_id, aeb->lnum, 0, false);