linux-kernel - Re: [patch 54/58] x86/xen/apic: Mark apic __ro_after

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Date:   Tue, 18 Jul 2023 18:08:48 +0200
From:   Juergen Gross <jgross@...e.com>
To:     Thomas Gleixner <tglx@...utronix.de>,
        LKML <linux-kernel@...r.kernel.org>
Cc:     x86@...nel.org, Linus Torvalds <torvalds@...ux-foundation.org>,
        Andrew Cooper <andrew.cooper3@...rix.com>,
        Tom Lendacky <thomas.lendacky@....com>,
        Paolo Bonzini <pbonzini@...hat.com>,
        Wei Liu <wei.liu@...nel.org>,
        Arjan van de Ven <arjan@...ux.intel.com>
Subject: Re: [patch 54/58] x86/xen/apic: Mark apic __ro_after_init

On 18.07.23 01:15, Thomas Gleixner wrote:
> Nothing can change it post init.
> 
> While at it mop up the whitespace damage which causes eyebleed due to an
> editor which is highlighting it.
> 
> Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
> Cc: Juergen Gross <jgross@...e.com>
> ---
>   arch/x86/xen/apic.c |   24 ++++++++++++------------
>   1 file changed, 12 insertions(+), 12 deletions(-)
> 
> --- a/arch/x86/xen/apic.c
> +++ b/arch/x86/xen/apic.c
> @@ -123,9 +123,9 @@ static int xen_cpu_present_to_apicid(int
>   		return BAD_APICID;
>   }
>   
> -static struct apic xen_pv_apic = {
> -	.name 				= "Xen PV",
> -	.probe 				= xen_apic_probe_pv,
> +static struct apic xen_pv_apic __ro_after_init = {
> +	.name				= "Xen PV",
> +	.probe				= xen_apic_probe_pv,
>   	.acpi_madt_oem_check		= xen_madt_oem_check,
>   
>   	/* .delivery_mode and .dest_mode_logical not used by XENPV */
> @@ -138,24 +138,24 @@ static struct apic xen_pv_apic = {

One additional note: you could drop initializing .check_apicid_used and
.ioapic_phys_id_map in xen_pv_apic as well, as those are 32-bit only, too.


Juergen

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