AF_TASKLET_SCHEDULED
if (!test_and_set_bit(AF_TASKLET_SCHEDULED, &a->flags))
set_bit(AF_TASKLET_SCHEDULED, &a->flags);
clear_bit(AF_TASKLET_SCHEDULED, &a->flags);
clear_bit(AF_TASKLET_SCHEDULED, &a->flags);
clear_bit(AF_TASKLET_SCHEDULED, &a->flags);