linux-kernel - Re: [patch 01/23] x86/apic: Avoid open coded x2apic detection

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Date:	Fri, 23 Jan 2015 17:13:19 +0100 (CET)
From:	Thomas Gleixner <tglx@...utronix.de>
To:	Borislav Petkov <bp@...en8.de>
cc:	LKML <linux-kernel@...r.kernel.org>,
	Jiang Liu <jiang.liu@...ux.intel.com>,
	Joerg Roedel <joro@...tes.org>, x86@...nel.org,
	Tony Luck <tony.luck@...el.com>
Subject: Re: [patch 01/23] x86/apic: Avoid open coded x2apic detection

On Thu, 22 Jan 2015, Thomas Gleixner wrote:
> On Fri, 16 Jan 2015, Borislav Petkov wrote:
> > 
> > #define x2apic_supported()      (cpu_has_x2apic)
> > 
> > which does the cpufeature test.
> > 
> > Can we agree on one interface only and simplify this a bit more?
> 
> I think I do that later on, but will make sure.

We can't do that some places want the cpu_has_x2apic check even when
X2APIC=n. x2apic_supported() is compiled to 0 when X2APIC=n.

Thanks,

	tglx

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