__node_2_pdl
p = __node_2_pdl(next_node);
p = __node_2_pdl(rb_first_cached(&rq->dl.pushable_dl_tasks_root));
return dl_entity_preempt(&__node_2_pdl(a)->dl, &__node_2_pdl(b)->dl);
dl_rq->earliest_dl.next = __node_2_pdl(leftmost)->dl.deadline;