sched/psi: Change update_triggers() to a 'void' function

Update_triggers() always returns now + group->rtpoll_min_period, and the
return value is only used by psi_rtpoll_work(), so change update_triggers()
to a void function, let group->rtpoll_next_update = now +
group->rtpoll_min_period directly.

This will avoid unnecessary function return value passing & simplifies
the function.

[ mingo: Updated changelog ]

Suggested-by: Suren Baghdasaryan <[e-mail]>
Signed-off-by: Yang Yang <[e-mail]>
Signed-off-by: Ingo Molnar <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]

kernel/sched/psi.c

···
 	return growth;
 }
 
-static u64 update_triggers(struct psi_group *group, u64 now, bool *update_total,
+static void update_triggers(struct psi_group *group, u64 now, bool *update_total,
 						   enum psi_aggregators aggregator)
 {
 	struct psi_trigger *t;
···
 		/* Reset threshold breach flag once event got generated */
 		t->pending_event = false;
 	}
-
-	return now + group->rtpoll_min_period;
 }
 
 static u64 update_averages(struct psi_group *group, u64 now)
···
 	}
 
 	if (now >= group->rtpoll_next_update) {
-		group->rtpoll_next_update = update_triggers(group, now, &update_total, PSI_POLL);
+		update_triggers(group, now, &update_total, PSI_POLL);
+		group->rtpoll_next_update = now + group->rtpoll_min_period;
 		if (update_total)
 			memcpy(group->rtpoll_total, group->total[PSI_POLL],
 				   sizeof(group->rtpoll_total));