WX_STATE_SERVICE_SCHED
if (!test_and_set_bit(WX_STATE_SERVICE_SCHED, wx->state))
if (WARN_ON(!test_bit(WX_STATE_SERVICE_SCHED, wx->state)))
clear_bit(WX_STATE_SERVICE_SCHED, wx->state);
clear_bit(WX_STATE_SERVICE_SCHED, wx->state);
clear_bit(WX_STATE_SERVICE_SCHED, wx->state);