itimer_find
it = itimer_find(p, timerid);
if (timer_id < 3 || (it = itimer_find(p, timer_id)) == NULL) {
if (timer_id < 3 || (it = itimer_find(p, timer_id)) == NULL) {
(it = itimer_find(p, timer_id)) == NULL) {
it = itimer_find(p, timerid);
static struct itimer *itimer_find(struct proc *, int);