linux-kernel - [tip: locking/core] x86/tsc: Make __use_tsc __ro_after

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Date: Fri, 22 Mar 2024 10:58:11 -0000
From: "tip-bot2 for Valentin Schneider" <tip-bot2@...utronix.de>
To: linux-tip-commits@...r.kernel.org
Cc: Valentin Schneider <vschneid@...hat.com>, Ingo Molnar <mingo@...nel.org>,
 Josh Poimboeuf <jpoimboe@...nel.org>, x86@...nel.org,
 linux-kernel@...r.kernel.org
Subject: [tip: locking/core] x86/tsc: Make __use_tsc __ro_after_init

The following commit has been merged into the locking/core branch of tip:

Commit-ID:     79a4567b2e8ae4d0282602a24f76f5e2382f5b98
Gitweb:        https://git.kernel.org/tip/79a4567b2e8ae4d0282602a24f76f5e2382f5b98
Author:        Valentin Schneider <vschneid@...hat.com>
AuthorDate:    Wed, 13 Mar 2024 19:01:06 +01:00
Committer:     Ingo Molnar <mingo@...nel.org>
CommitterDate: Fri, 22 Mar 2024 11:18:20 +01:00

x86/tsc: Make __use_tsc __ro_after_init

__use_tsc is only ever enabled in __init tsc_enable_sched_clock(), so mark
it as __ro_after_init.

Signed-off-by: Valentin Schneider <vschneid@...hat.com>
Signed-off-by: Ingo Molnar <mingo@...nel.org>
Acked-by: Josh Poimboeuf <jpoimboe@...nel.org>
Link: https://lore.kernel.org/r/20240313180106.2917308-5-vschneid@redhat.com
---
 arch/x86/kernel/tsc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/kernel/tsc.c b/arch/x86/kernel/tsc.c
index 5a69a49..0f7624e 100644
--- a/arch/x86/kernel/tsc.c
+++ b/arch/x86/kernel/tsc.c
@@ -44,7 +44,7 @@ EXPORT_SYMBOL(tsc_khz);
 static int __read_mostly tsc_unstable;
 static unsigned int __initdata tsc_early_khz;
 
-static DEFINE_STATIC_KEY_FALSE(__use_tsc);
+static DEFINE_STATIC_KEY_FALSE_RO(__use_tsc);
 
 int tsc_clocksource_reliable;