linux-kernel - Re: [RFC -tip] x86,apic - set cpu_has

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Message-ID: <alpine.LFD.2.00.0907120141020.13862@eddie.linux-mips.org>
Date:	Sun, 12 Jul 2009 01:41:54 +0100 (BST)
From:	"Maciej W. Rozycki" <macro@...ux-mips.org>
To:	Cyrill Gorcunov <gorcunov@...il.com>
cc:	Ingo Molnar <mingo@...e.hu>, "H. Peter Anvin" <hpa@...or.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Yinghai Lu <yinghai@...nel.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [RFC -tip] x86,apic - set cpu_has_apic for discrete apic

On Sun, 12 Jul 2009, Cyrill Gorcunov wrote:

> In case of discrete apic (due to hardware or firmware reason)
> cpuid may not retrieve cpu_has_apic bit. So for SMP
> compiled kernels instead of long check we may set "fake"
> cpu_has_apic bit and check only the bit in further code
> flow.
> 
> Signed-off-by: Cyrill Gorcunov <gorcunov@...nvz.org>
> ---
> 
> Please review carefully.

 Sure: how did you test it or plan to do so?

  Maciej
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