linux-kernel - Re: [PATCH 8/9] x86, RAS: Add attributes needed for HW injection

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Date:	Thu, 20 Oct 2011 17:06:05 +0200
From:	Borislav Petkov <bp@...64.org>
To:	David Rientjes <rientjes@...gle.com>
Cc:	EDAC devel <linux-edac@...r.kernel.org>,
	Tony Luck <tony.luck@...el.com>, Ingo Molnar <mingo@...e.hu>,
	X86-ML <x86@...nel.org>, LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 8/9] x86, RAS: Add attributes needed for HW injection

On Wed, Oct 19, 2011 at 05:19:06PM -0400, David Rientjes wrote:
> On Wed, 19 Oct 2011, Borislav Petkov wrote:
> 
> > > That wouldn't catch an offline cpuid, you probably want cpu_online(val)?
> > 
> > Good catch, thanks.
> > 
> > So I'm looking at <arch/x86/kernel/cpuid.c> which is how the validity of
> > a cpu value should be tested properly, IMHO:
> > 
> > static int cpuid_open(struct inode *inode, struct file *file)
> > {
> > 	...
> > 
> > 	if (cpu >= nr_cpu_ids || !cpu_online(cpu))
> > 		return -ENXIO;	/* No such CPU */
> > 	...
> 
> Right, the comment for cpumask_test_cpu(), which cpu_online() really is, 
> wants a cpu < nr_cpu_ids.

Fixed, thanks.

-- 
Regards/Gruss,
Boris.

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