linux-kernel - Re: [PATCH] perf/x86/intel: Use rdmsrl

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Message-ID: <CABPqkBQCVrqtNvva5DD3sE0q=MsJNauKMUv=Vd2GH74v8SsBWQ@mail.gmail.com>
Date:	Wed, 23 Apr 2014 17:18:29 +0200
From:	Stephane Eranian <eranian@...gle.com>
To:	Borislav Petkov <bp@...en8.de>
Cc:	Peter Zijlstra <peterz@...radead.org>,
	Venkatesh Srinivas <venkateshs@...gle.com>,
	LKML <linux-kernel@...r.kernel.org>,
	"mingo@...e.hu" <mingo@...e.hu>,
	"ak@...ux.intel.com" <ak@...ux.intel.com>,
	"Yan, Zheng" <zheng.z.yan@...el.com>
Subject: Re: [PATCH] perf/x86/intel: Use rdmsrl_safe when initializing RAPL PMU.

On Wed, Apr 23, 2014 at 5:16 PM, Borislav Petkov <bp@...en8.de> wrote:
> On Wed, Apr 23, 2014 at 05:14:33PM +0200, Stephane Eranian wrote:
>> Wouldn't rdmsrl_safe() return 0 on success?
>
> Yes.
>
then the if() test is wrong:
if (!rdmsrl_safe())
   return -1;

Should be:
if (rdmsrl_safe())
  return -1;

Or am I missing something?


> --
> Regards/Gruss,
>     Boris.
>
> Sent from a fat crate under my desk. Formatting is fine.
> --
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