linux-kernel - [PATCH 6.6 4/5] freezer,sched: Clean saved

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Message-Id: <20250728024121.33864-5-chenridong@huaweicloud.com>
Date: Mon, 28 Jul 2025 02:41:20 +0000
From: Chen Ridong <chenridong@...weicloud.com>
To: mingo@...hat.com,
	peterz@...radead.org,
	juri.lelli@...hat.com,
	vincent.guittot@...aro.org,
	dietmar.eggemann@....com,
	rostedt@...dmis.org,
	bsegall@...gle.com,
	mgorman@...e.de,
	bristot@...hat.com,
	vschneid@...hat.com,
	rafael@...nel.org,
	pavel@....cz
Cc: linux-kernel@...r.kernel.org,
	linux-pm@...r.kernel.org,
	lujialin4@...wei.com,
	chenridong@...wei.com
Subject: [PATCH 6.6 4/5] freezer,sched: Clean saved_state when restoring it during thaw

From: Elliot Berman <quic_eberman@...cinc.com>

[ Upstream commit 418146e39891ef1fb2284dee4cabbfe616cd21cf ]

Clean saved_state after using it during thaw. Cleaning the saved_state
allows us to avoid some unnecessary branches in ttwu_state_match.

Signed-off-by: Elliot Berman <quic_eberman@...cinc.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@...radead.org>
Link: https://lore.kernel.org/r/20231120-freezer-state-multiple-thaws-v1-2-f2e1dd7ce5a2@quicinc.com
Signed-off-by: Chen Ridong <chenridong@...wei.com>
---
 kernel/freezer.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/kernel/freezer.c b/kernel/freezer.c
index 759006a9a910..f57aaf96b829 100644
--- a/kernel/freezer.c
+++ b/kernel/freezer.c
@@ -187,6 +187,7 @@ static int __restore_freezer_state(struct task_struct *p, void *arg)
 
 	if (state != TASK_RUNNING) {
 		WRITE_ONCE(p->__state, state);
+		p->saved_state = TASK_RUNNING;
 		return 1;
 	}
 
-- 
2.34.1