linux-kernel - [PATCH linux-next 1/3] sched/psi: Change update

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Message-ID: <202310092024289721617@zte.com.cn>
Date:   Mon, 9 Oct 2023 20:24:28 +0800 (CST)
From:   <yang.yang29@....com.cn>
To:     <mingo@...nel.org>, <surenb@...gle.com>, <peterz@...radead.org>
Cc:     <hannes@...xchg.org>, <mingo@...hat.com>,
        <linux-kernel@...r.kernel.org>, <juri.lelli@...hat.com>
Subject: [PATCH linux-next 1/3] sched/psi: Change update_triggers() to a void function

From: Yang Yang <yang.yang29@....com.cn>

Update_triggers() always return 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.

Signed-off-by: Yang Yang <yang.yang29@....com.cn>
Suggested-by: Suren Baghdasaryan <surenb@...gle.com>
Suggested-by: Ingo Molnar <mingo@...nel.org>
---
 kernel/sched/psi.c | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/kernel/sched/psi.c b/kernel/sched/psi.c
index 1d0f634725a6..be853f227e40 100644
--- a/kernel/sched/psi.c
+++ b/kernel/sched/psi.c
@@ -434,7 +434,7 @@ static u64 window_update(struct psi_window *win, u64 now, u64 value)
 	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;
@@ -503,8 +503,6 @@ static u64 update_triggers(struct psi_group *group, u64 now, bool *update_total,
 		/* 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)
@@ -706,7 +704,8 @@ static void psi_rtpoll_work(struct psi_group *group)
 	}

 	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));
-- 
2.25.1