linux-kernel - [PATCH] x86: mce: make mce

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Message-Id: <20240204-bus_cleanup-x86-v1-1-4e7171be88e8@marliere.net>
Date: Sun, 04 Feb 2024 11:32:29 -0300
From: "Ricardo B. Marliere" <ricardo@...liere.net>
To: Tony Luck <tony.luck@...el.com>, Borislav Petkov <bp@...en8.de>, 
 Thomas Gleixner <tglx@...utronix.de>, Ingo Molnar <mingo@...hat.com>, 
 Dave Hansen <dave.hansen@...ux.intel.com>, x86@...nel.org, 
 "H. Peter Anvin" <hpa@...or.com>
Cc: linux-edac@...r.kernel.org, linux-kernel@...r.kernel.org, 
 Greg Kroah-Hartman <gregkh@...uxfoundation.org>, 
 "Ricardo B. Marliere" <ricardo@...liere.net>
Subject: [PATCH] x86: mce: make mce_subsys const

Now that the driver core can properly handle constant struct bus_type,
move the mce_subsys variable to be a constant structure as well,
placing it into read-only memory which can not be modified at runtime.

Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Suggested-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Signed-off-by: Ricardo B. Marliere <ricardo@...liere.net>
---
 arch/x86/kernel/cpu/mce/core.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/kernel/cpu/mce/core.c b/arch/x86/kernel/cpu/mce/core.c
index 7b397370b4d6..9bb208ba7ff4 100644
--- a/arch/x86/kernel/cpu/mce/core.c
+++ b/arch/x86/kernel/cpu/mce/core.c
@@ -2399,7 +2399,7 @@ static void mce_enable_ce(void *all)
 		__mcheck_cpu_init_timer();
 }

-static struct bus_type mce_subsys = {
+static const struct bus_type mce_subsys = {
 	.name		= "machinecheck",
 	.dev_name	= "machinecheck",
 };

---
base-commit: edc8fc01f608108b0b7580cb2c29dfb5135e5f0e
change-id: 20240204-bus_cleanup-x86-f25892c614f8

Best regards,
-- 
Ricardo B. Marliere <ricardo@...liere.net>