static void poll_timer_fn(struct timer_list *t)
{
	struct psi_group *group = from_timer(group, t, poll_timer);

	atomic_set(&group->poll_wakeup, 1);
	wake_up_interruptible(&group->poll_wait);
}
static void poll_timer_fn(struct timer_list *t)
{
	struct psi_group *group = from_timer(group, t, poll_timer);

	atomic_set(&group->poll_wakeup, 1);
	wake_up_interruptible(&group->poll_wait);
}