DTRACE_SCHED2
DTRACE_SCHED2(dequeue, kthread_t *, tp, disp_t *, dp);
DTRACE_SCHED2(dequeue, kthread_t *, tp, disp_t *, dp);
DTRACE_SCHED2(change__pri, kthread_t *, (t), pri_t, __new_pri); \
DTRACE_SCHED2(change__pri, kthread_t *, (t), pri_t, (pri)); \