KTHREAD_SHOULD_PARK
set_bit(KTHREAD_SHOULD_PARK, &ts->kt_flags);
clear_bit(KTHREAD_SHOULD_PARK, &ts->kt_flags);
return test_bit(KTHREAD_SHOULD_PARK, ¤t->kt_flags);
if (test_bit(KTHREAD_SHOULD_PARK, ¤t->kt_flags) == 0)