kernel/time/posix-timers.c

437 static int common_timer_create(struct k_itimer *new_timer)
439 	hrtimer_init(&new_timer->it.real.timer, new_timer->it_clock, 0);
448 	struct k_itimer *new_timer;
456 	new_timer = alloc_posix_timer();
457 	if (unlikely(!new_timer))
460 	spin_lock_init(&new_timer->it_lock);
464 	 * because new_timer::it_signal is still NULL. The timer id is also
467 	new_timer_id = posix_timer_add(new_timer);
469 		posix_timer_free(new_timer);
473 	new_timer->it_id = (timer_t) new_timer_id;
474 	new_timer->it_clock = which_clock;
475 	new_timer->kclock = kc;
476 	new_timer->it_overrun = -1LL;
480 		new_timer->it_pid = get_pid(good_sigevent(event));
482 		if (!new_timer->it_pid) {
486 		new_timer->it_sigev_notify     = event->sigev_notify;
487 		new_timer->sigq->info.si_signo = event->sigev_signo;
488 		new_timer->sigq->info.si_value = event->sigev_value;
490 		new_timer->it_sigev_notify     = SIGEV_SIGNAL;
491 		new_timer->sigq->info.si_signo = SIGALRM;
492 		memset(&new_timer->sigq->info.si_value, 0, sizeof(sigval_t));
493 		new_timer->sigq->info.si_value.sival_int = new_timer->it_id;
494 		new_timer->it_pid = get_pid(task_tgid(current));
497 	new_timer->sigq->info.si_tid   = new_timer->it_id;
498 	new_timer->sigq->info.si_code  = SI_TIMER;
506 	 * now but not yet valid because new_timer::signal is still NULL.
511 	error = kc->timer_create(new_timer);
517 	WRITE_ONCE(new_timer->it_signal, current->signal);
518 	list_add(&new_timer->list, &current->signal->posix_timers);
521 	 * After unlocking sighand::siglock @new_timer is subject to
526 	posix_timer_unhash_and_free(new_timer);