linux-kernel - [PATCH v2 2/3] sched/deadline: Use __sub_running_bw() throughout dl_change

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Message-Id: <20190802145945.18702-3-dietmar.eggemann@arm.com>
Date:   Fri,  2 Aug 2019 15:59:44 +0100
From:   Dietmar Eggemann <dietmar.eggemann@....com>
To:     Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...nel.org>,
        Juri Lelli <juri.lelli@...hat.com>
Cc:     Luca Abeni <luca.abeni@...tannapisa.it>,
        Daniel Bristot de Oliveira <bristot@...hat.com>,
        Valentin Schneider <valentin.schneider@....com>,
        Qais Yousef <qais.yousef@....com>, linux-kernel@...r.kernel.org
Subject: [PATCH v2 2/3] sched/deadline: Use __sub_running_bw() throughout dl_change_utilization()

dl_change_utilization() has a BUG_ON() to check that no schedutil
kthread (sugov) is entering this function. So instead of calling
sub_running_bw() which checks for the special entity related to a
sugov thread, call the underlying function __sub_running_bw().

Signed-off-by: Dietmar Eggemann <dietmar.eggemann@....com>
---
 kernel/sched/deadline.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/sched/deadline.c b/kernel/sched/deadline.c
index 6dafaabde1d6..c34e35e7ac23 100644
--- a/kernel/sched/deadline.c
+++ b/kernel/sched/deadline.c
@@ -164,7 +164,7 @@ void dl_change_utilization(struct task_struct *p, u64 new_bw)
 
 	rq = task_rq(p);
 	if (p->dl.dl_non_contending) {
-		sub_running_bw(&p->dl, &rq->dl);
+		__sub_running_bw(p->dl.dl_bw, &rq->dl);
 		p->dl.dl_non_contending = 0;
 		/*
 		 * If the timer handler is currently running and the
-- 
2.17.1