linux-kernel - Re: [PATCH] x86: introduce a new Linux defined feature flag for PAT support

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Message-ID: <48232DFB.1030703@zytor.com>
Date:	Thu, 08 May 2008 09:44:43 -0700
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Ingo Molnar <mingo@...e.hu>
CC:	Thomas Gleixner <tglx@...utronix.de>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Rene Herman <rene.herman@...access.nl>,
	Adrian Bunk <bunk@...nel.org>,
	Yinghai Lu <yhlu.kernel@...il.com>,
	Linux Kernel <linux-kernel@...r.kernel.org>,
	akpm@...ux-foundation.org, Pavel Machek <pavel@...e.cz>
Subject: Re: [PATCH] x86: introduce a new Linux defined feature flag for	PAT
 support

Ingo Molnar wrote:
> * Thomas Gleixner <tglx@...utronix.de> wrote:
> 
>> Subject: x86: cleanup PAT cpu validation
>> From: Thomas Gleixner <tglx@...utronix.de>
>> Date: Thu, 08 May 2008 09:18:43 +0200
>>
>> Move the scattered checks for PAT support to a single function. Its 
>> moved to addon_cpuid_features.c as this file is shared between 32 and 
>> 64 bit.
> 
> thanks Thomas, i have applied your cleanup patch - looks good here too 
> and it booted fine on a few boxes.
> 
> (i did a small cleanup: changed the define to static const int)
> 
> Peter, what are your plans for a more general cleanup and 32-bit/64-bit 
> unification for the x86 CPU detection code - do you have any specific 
> ideas already? I suspect we want it all to end up unified under 
> arch/x86/kernel/cpu/, by moving the relevant bits of 
> arch/x86/kernel/setup_64.c there, right? It is no small task for sure.
> 

Yes, that's the plan, and no, it's not a small task.

	-hpa
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