hrtick_start     1738 kernel/sched/deadline.c 	hrtick_start(rq, p->dl.runtime);
hrtick_start     5152 kernel/sched/fair.c 		hrtick_start(rq, delta);
hrtick_start     1975 kernel/sched/sched.h void hrtick_start(struct rq *rq, u64 delay);