BLK_MQ_S_SCHED_RESTART
if (test_bit(BLK_MQ_S_SCHED_RESTART, &hctx->state))
set_bit(BLK_MQ_S_SCHED_RESTART, &hctx->state);
clear_bit(BLK_MQ_S_SCHED_RESTART, &hctx->state);
return test_bit(BLK_MQ_S_SCHED_RESTART, &hctx->state);
if (test_bit(BLK_MQ_S_SCHED_RESTART, &hctx->state))