DEQUEUE_CLASS
if ((flags & DEQUEUE_CLASS) && p->sched_class->switching_from)
if (!(flags & DEQUEUE_CLASS)) {
if ((flags & DEQUEUE_CLASS) && p->sched_class->switched_from)
queue_flag |= DEQUEUE_CLASS;
queue_flags |= DEQUEUE_CLASS;
queue_flags |= DEQUEUE_CLASS;
queue_flags |= DEQUEUE_CLASS;