linux-kernel - [PATCH 1/1] sched: Add update_rq_clock() in sched_rt_rq

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Message-ID: <20211224012239.4694-1-yt.chang@mediatek.com>
Date:   Fri, 24 Dec 2021 09:22:39 +0800
From:   YT Chang <yt.chang@...iatek.com>
To:     YT Chang <yt.chang@...iatek.com>, Ingo Molnar <mingo@...hat.com>,
        "Peter Zijlstra" <peterz@...radead.org>,
        Juri Lelli <juri.lelli@...hat.com>,
        "Vincent Guittot" <vincent.guittot@...aro.org>,
        Dietmar Eggemann <dietmar.eggemann@....com>,
        Steven Rostedt <rostedt@...dmis.org>,
        Ben Segall <bsegall@...gle.com>, Mel Gorman <mgorman@...e.de>,
        "Daniel Bristot de Oliveira" <bristot@...hat.com>,
        Matthias Brugger <matthias.bgg@...il.com>
CC:     <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-mediatek@...ts.infradead.org>, <wsd_upstream@...iatek.com>
Subject: [PATCH 1/1] sched: Add update_rq_clock() in sched_rt_rq_enqueue()

Add update_rq_clock() in sched_rt_rq_enqueue() to
prevent the warning "rq->clock_update_flags < RQCF_ACT_SKIP"
when call rq_clock() in cpufreq_update_util().

sched_rt_rq_enqueue ->
   enqueue_top_rt_rq ->
      cpufreq_update_util ->
         rq_clock ->
            assert_clock_updated

Signed-off-by: YT Chang <yt.chang@...iatek.com>
Change-Id: I4fba5a561b7064aafa991d7f1a34431607779cb4
---
 kernel/sched/rt.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/kernel/sched/rt.c b/kernel/sched/rt.c
index b48baaba2fc2..faf1a68c0723 100644
--- a/kernel/sched/rt.c
+++ b/kernel/sched/rt.c
@@ -539,6 +539,7 @@ static void sched_rt_rq_enqueue(struct rt_rq *rt_rq)
 
 	int cpu = cpu_of(rq);
 
+	update_rq_clock(rq);
 	rt_se = rt_rq->tg->rt_se[cpu];
 
 	if (rt_rq->rt_nr_running) {
-- 
2.18.0