linux-kernel - RE: [PATCH v2 3/3] x86/mce: Make mce_notify_irq() depend on CONFIG_X86_MCELOG

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Message-ID: <CY8PR11MB7134CA4E20537911F5E8B11489FD2@CY8PR11MB7134.namprd11.prod.outlook.com>
Date: Tue, 11 Feb 2025 07:20:37 +0000
From: "Zhuo, Qiuxu" <qiuxu.zhuo@...el.com>
To: Nikolay Borisov <nik.borisov@...e.com>, "linux-edac@...r.kernel.org"
	<linux-edac@...r.kernel.org>
CC: "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"x86@...nel.org" <x86@...nel.org>, "Luck, Tony" <tony.luck@...el.com>
Subject: RE: [PATCH v2 3/3] x86/mce: Make mce_notify_irq() depend on
 CONFIG_X86_MCELOG_LEGACY

> From: Nikolay Borisov <nik.borisov@...e.com>
> [...]
> Subject: [PATCH v2 3/3] x86/mce: Make mce_notify_irq() depend on
> CONFIG_X86_MCELOG_LEGACY
> 
> mce_notify_irq() really depends on the legacy mcelog being enabled as
> otherwise mce_work_trigger() will never schedule the trigger work as
> mce_helper can't be set unless CONFIG_X86_MCELOG_LEGACY is defined.
> 
> Signed-off-by: Nikolay Borisov <nik.borisov@...e.com>
> ---
>  arch/x86/kernel/cpu/mce/core.c | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)
> 
> diff --git a/arch/x86/kernel/cpu/mce/core.c b/arch/x86/kernel/cpu/mce/core.c
> index d55b1903fde6..8b8553e144ce 100644
> --- a/arch/x86/kernel/cpu/mce/core.c
> +++ b/arch/x86/kernel/cpu/mce/core.c
> @@ -591,11 +591,13 @@ EXPORT_SYMBOL_GPL(mce_is_correctable);
>   */
>  static int mce_notify_irq(void)
>  {
> +#ifdef CONFIG_X86_MCELOG_LEGACY
> +
>  	if (test_and_clear_bit(0, &mce_need_notify)) {
>  		mce_work_trigger();
>  		return 1;
>  	}
> -
> +#endif
>  	return 0;
>  }

The empty stub function below can also be removed from the file: arch/x86/kernel/cpu/mce/internal.h

         static inline void mce_work_trigger(void)       { }