gk110_chan_preempt
.preempt = gk110_chan_preempt,
.preempt = gk110_chan_preempt,
.preempt = gk110_chan_preempt,
.preempt = gk110_chan_preempt,
void gk110_chan_preempt(struct nvkm_chan *);
.preempt = gk110_chan_preempt,