elv_support_iosched 673 block/elevator.c if (!elv_support_iosched(q)) elv_support_iosched 767 block/elevator.c if (!queue_is_mq(q) || !elv_support_iosched(q)) elv_support_iosched 798 block/elevator.c if (elv_support_iosched(q) &&