BLK_MQ_S_STOPPED
set_bit(BLK_MQ_S_STOPPED, &hctx->state);
clear_bit(BLK_MQ_S_STOPPED, &hctx->state);
clear_bit(BLK_MQ_S_STOPPED, &hctx->state);
if (likely(!test_bit(BLK_MQ_S_STOPPED, &hctx->state)))
return test_bit(BLK_MQ_S_STOPPED, &hctx->state);