linux-kernel - Re: [PATCH V3 2/6] perf/core: Add helper to obtain performance counter index

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Date:   Wed, 19 Sep 2018 11:17:59 +0200
From:   Peter Zijlstra <peterz@...radead.org>
To:     Reinette Chatre <reinette.chatre@...el.com>
Cc:     tglx@...utronix.de, fenghua.yu@...el.com, tony.luck@...el.com,
        mingo@...hat.com, acme@...nel.org, gavin.hindman@...el.com,
        jithu.joseph@...el.com, dave.hansen@...el.com, hpa@...or.com,
        x86@...nel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH V3 2/6] perf/core: Add helper to obtain performance
 counter index

On Tue, Sep 18, 2018 at 10:54:28AM -0700, Reinette Chatre wrote:
> It works, but checkpatch.pl does not like it very much:
> > CHECK: extern prototypes should be avoided in .h files
> > #66: FILE: arch/x86/include/asm/perf_event.h:273:
> > +extern int x86_perf_rdpmc_index(struct perf_event *event);

Checkpatch is wrong. Ignore it.