linux-kernel - Re: [PATCHv7 02/16] x86/apic: Mark acpi_mp_wake_* variables as __ro_after

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Date: Mon, 19 Feb 2024 12:46:03 +0800
From: Baoquan He <bhe@...hat.com>
To: "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>
Cc: Thomas Gleixner <tglx@...utronix.de>, Ingo Molnar <mingo@...hat.com>,
	Borislav Petkov <bp@...en8.de>,
	Dave Hansen <dave.hansen@...ux.intel.com>, x86@...nel.org,
	"Rafael J. Wysocki" <rafael@...nel.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Adrian Hunter <adrian.hunter@...el.com>,
	Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@...ux.intel.com>,
	Elena Reshetova <elena.reshetova@...el.com>,
	Jun Nakajima <jun.nakajima@...el.com>,
	Rick Edgecombe <rick.p.edgecombe@...el.com>,
	Tom Lendacky <thomas.lendacky@....com>,
	"Kalra, Ashish" <ashish.kalra@....com>,
	Sean Christopherson <seanjc@...gle.com>,
	"Huang, Kai" <kai.huang@...el.com>, kexec@...ts.infradead.org,
	linux-coco@...ts.linux.dev, linux-kernel@...r.kernel.org
Subject: Re: [PATCHv7 02/16] x86/apic: Mark acpi_mp_wake_* variables as
 __ro_after_init

On 02/12/24 at 12:44pm, Kirill A. Shutemov wrote:
> acpi_mp_wake_mailbox_paddr and acpi_mp_wake_mailbox initialized once
> during ACPI MADT init and never changed.
> 
> Signed-off-by: Kirill A. Shutemov <kirill.shutemov@...ux.intel.com>
> Acked-by: Kai Huang <kai.huang@...el.com>

Reviewed-by: Baoquan He <bhe@...hat.com>

> ---
>  arch/x86/kernel/acpi/madt_wakeup.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/arch/x86/kernel/acpi/madt_wakeup.c b/arch/x86/kernel/acpi/madt_wakeup.c
> index 7f164d38bd0b..cf79ea6f3007 100644
> --- a/arch/x86/kernel/acpi/madt_wakeup.c
> +++ b/arch/x86/kernel/acpi/madt_wakeup.c
> @@ -6,10 +6,10 @@
>  #include <asm/processor.h>
>  
>  /* Physical address of the Multiprocessor Wakeup Structure mailbox */
> -static u64 acpi_mp_wake_mailbox_paddr;
> +static u64 acpi_mp_wake_mailbox_paddr __ro_after_init;
>  
>  /* Virtual address of the Multiprocessor Wakeup Structure mailbox */
> -static struct acpi_madt_multiproc_wakeup_mailbox *acpi_mp_wake_mailbox;
> +static struct acpi_madt_multiproc_wakeup_mailbox *acpi_mp_wake_mailbox __ro_after_init;
>  
>  static int acpi_wakeup_cpu(u32 apicid, unsigned long start_ip)
>  {
> -- 
> 2.43.0
>