linux-kernel - [tip: sched/core] sched/psi: Change update

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Date:   Mon, 09 Oct 2023 12:59:56 -0000
From:   "tip-bot2 for Yang Yang" <tip-bot2@...utronix.de>
To:     linux-tip-commits@...r.kernel.org
Cc:     Suren Baghdasaryan <surenb@...gle.com>,
        Yang Yang <yang.yang29@....com.cn>,
        Ingo Molnar <mingo@...nel.org>, x86@...nel.org,
        linux-kernel@...r.kernel.org
Subject: [tip: sched/core] sched/psi: Change update_triggers() to a 'void' function

The following commit has been merged into the sched/core branch of tip:

Commit-ID:     e03dc9fa0663bc303383170e961561462ff00c93
Gitweb:        https://git.kernel.org/tip/e03dc9fa0663bc303383170e961561462ff00c93
Author:        Yang Yang <yang.yang29@....com.cn>
AuthorDate:    Mon, 09 Oct 2023 20:24:28 +08:00
Committer:     Ingo Molnar <mingo@...nel.org>
CommitterDate: Mon, 09 Oct 2023 14:54:50 +02:00

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 <surenb@...gle.com>
Signed-off-by: Yang Yang <yang.yang29@....com.cn>
Signed-off-by: Ingo Molnar <mingo@...nel.org>
Link: https://lore.kernel.org/r/202310092024289721617@zte.com.cn
---
 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 1d0f634..be853f2 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));