linux-kernel - Re: [Xen-devel] [PATCH] xen/apic: Update the comment for apic_id

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Date:	Wed, 13 Jul 2016 07:56:10 +0000
From:	"Wei, Jiangang" <weijg.fnst@...fujitsu.com>
To:	"boris.ostrovsky@...cle.com" <boris.ostrovsky@...cle.com>
CC:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"david.vrabel@...rix.com" <david.vrabel@...rix.com>,
	"tglx@...utronix.de" <tglx@...utronix.de>,
	"jgross@...e.com" <jgross@...e.com>,
	"konrad.wilk@...cle.com" <konrad.wilk@...cle.com>,
	"x86@...nel.org" <x86@...nel.org>, "hpa@...or.com" <hpa@...or.com>,
	"mingo@...hat.com" <mingo@...hat.com>,
	"xen-devel@...ts.xenproject.org" <xen-devel@...ts.xenproject.org>
Subject: Re: [Xen-devel] [PATCH] xen/apic: Update the comment for
 apic_id_mask

On Thu, 2016-07-07 at 11:37 -0400, Boris Ostrovsky wrote:
> On 07/07/2016 11:25 AM, Konrad Rzeszutek Wilk wrote:
> > On Thu, Jul 07, 2016 at 11:28:18AM +0800, Wei Jiangang wrote:
> >> verify_local_APIC() had been removed by
> >> commit 4399c03c6780 ("x86/apic: Remove verify_local_APIC()"),
> >> so apic_id_mask isn't used by it.
> 
> Is anyone actually using this field? It looks like 4399c03c6780 removed
> the only user.

Indeed, the field is useless.
Maybe we can remove this field from the struct apic .
what's your opinion?

Thanks,
wei
> 
> -boris
> 
> 
> > CC-ing the proper maintainers.
> >> Signed-off-by: Wei Jiangang <weijg.fnst@...fujitsu.com>
> >> ---
> >>  arch/x86/xen/apic.c | 2 +-
> >>  1 file changed, 1 insertion(+), 1 deletion(-)
> >>
> >> diff --git a/arch/x86/xen/apic.c b/arch/x86/xen/apic.c
> >> index db52a7fafcc2..9cbb1f48381b 100644
> >> --- a/arch/x86/xen/apic.c
> >> +++ b/arch/x86/xen/apic.c
> >> @@ -177,7 +177,7 @@ static struct apic xen_pv_apic = {
> >>  
> >>  	.get_apic_id 			= xen_get_apic_id,
> >>  	.set_apic_id 			= xen_set_apic_id, /* Can be NULL on 32-bit. */
> >> -	.apic_id_mask			= 0xFF << 24, /* Used by verify_local_APIC. Match with what xen_get_apic_id does. */
> >> +	.apic_id_mask			= 0xFF << 24, /* Match with what xen_get_apic_id does. */
> >>  
> >>  	.cpu_mask_to_apicid_and		= flat_cpu_mask_to_apicid_and,
> >>  
> >> -- 
> >> 1.9.3
> >>
> >>
> >>
> >>
> >> _______________________________________________
> >> Xen-devel mailing list
> >> Xen-devel@...ts.xen.org
> >> https://lists.xen.org/xen-devel
> 
> 
> 
>