linux-kernel - [PATCH] preempt/dynamic: Fix setup_preempt

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Message-Id: <20211203233203.133581-1-ahalaney@redhat.com>
Date:   Fri,  3 Dec 2021 17:32:03 -0600
From:   Andrew Halaney <ahalaney@...hat.com>
To:     peterz@...radead.org
Cc:     mingo@...hat.com, juri.lelli@...hat.com,
        vincent.guittot@...aro.org, dietmar.eggemann@....com,
        rostedt@...dmis.org, bsegall@...gle.com, mgorman@...e.de,
        bristot@...hat.com, frederic@...nel.org, mark.rutland@....com,
        linux-kernel@...r.kernel.org, Andrew Halaney <ahalaney@...hat.com>
Subject: [PATCH] preempt/dynamic: Fix setup_preempt_mode() return value

__setup() callbacks expect 1 for success and 0 for failure. Correct the
usage here to reflect that.

Fixes: 826bfeb37bb4 ("preempt/dynamic: Support dynamic preempt with preempt= boot option")
Reported-by: Mark Rutland <mark.rutland@....com>
Signed-off-by: Andrew Halaney <ahalaney@...hat.com>
---
 kernel/sched/core.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index 3592942ea29c..d4f60583be6e 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -6730,11 +6730,11 @@ static int __init setup_preempt_mode(char *str)
 	int mode = sched_dynamic_mode(str);
 	if (mode < 0) {
 		pr_warn("Dynamic Preempt: unsupported mode: %s\n", str);
-		return 1;
+		return 0;
 	}
 
 	sched_dynamic_update(mode);
-	return 0;
+	return 1;
 }
 __setup("preempt=", setup_preempt_mode);
 
-- 
2.31.1