linux-kernel - Re: [PATCH -v2 1/2] x86, microcode: Sanitize per-cpu microcode reloading interface

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Message-ID: <20120626195150.GC28495@aftab.osrc.amd.com>
Date:	Tue, 26 Jun 2012 21:51:50 +0200
From:	Borislav Petkov <bp@...64.org>
To:	Peter Zijlstra <peterz@...radead.org>
Cc:	X86-ML <x86@...nel.org>, "H. Peter Anvin" <hpa@...or.com>,
	Ingo Molnar <mingo@...nel.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	LKML <linux-kernel@...r.kernel.org>,
	Andreas Herrmann <andreas.herrmann3@....com>,
	Henrique de Moraes Holschuh <hmh@....eng.br>,
	Stephane Eranian <eranian@...gle.com>
Subject: Re: [PATCH -v2 1/2] x86, microcode: Sanitize per-cpu microcode
 reloading interface

On Tue, Jun 26, 2012 at 09:40:43PM +0200, Borislav Petkov wrote:
> > +	put_online_cpus();
> > +
> > +	if (pebs_broken == x86_pmu.pebs_broken)
> 
> This is strange, why not:
> 
> 	if (pebs_broken && x86_pmu.pebs_broken)
> 
> ?
> 
> > +		return;

Ah, nevermind, I see what you're doing here.

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Boris.

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