linux-kernel - [PATCH v7 15/31] sched/clock: Mark sched_clock_running key as __ro_after

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Message-ID: <20251114150133.1056710-16-vschneid@redhat.com>
Date: Fri, 14 Nov 2025 16:01:17 +0100
From: Valentin Schneider <vschneid@...hat.com>
To: linux-kernel@...r.kernel.org,
	linux-mm@...ck.org,
	rcu@...r.kernel.org,
	x86@...nel.org,
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Cc: Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
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	Dave Hansen <dave.hansen@...ux.intel.com>,
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	Shrikanth Hegde <sshegde@...ux.ibm.com>
Subject: [PATCH v7 15/31] sched/clock: Mark sched_clock_running key as __ro_after_init

sched_clock_running is only ever enabled in the __init functions
sched_clock_init() and sched_clock_init_late(), and is never disabled. Mark
it __ro_after_init.

Signed-off-by: Valentin Schneider <vschneid@...hat.com>
---
 kernel/sched/clock.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/sched/clock.c b/kernel/sched/clock.c
index f5e6dd6a6b3af..c1a028e99d2cd 100644
--- a/kernel/sched/clock.c
+++ b/kernel/sched/clock.c
@@ -69,7 +69,7 @@ notrace unsigned long long __weak sched_clock(void)
 }
 EXPORT_SYMBOL_GPL(sched_clock);
 
-static DEFINE_STATIC_KEY_FALSE(sched_clock_running);
+static DEFINE_STATIC_KEY_FALSE_RO(sched_clock_running);
 
 #ifdef CONFIG_HAVE_UNSTABLE_SCHED_CLOCK
 /*
-- 
2.51.0