linux-kernel - Re: [PATCH v3 7/9] perf header: Add check_perf

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Date:	Tue, 25 Sep 2012 11:07:15 +0900
From:	Namhyung Kim <namhyung@...nel.org>
To:	Feng Tang <feng.tang@...el.com>
Cc:	acme@...hat.com, mingo@...e.hu, a.p.zijlstra@...llo.nl,
	andi@...stfloor.org, dsahern@...il.com,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 7/9] perf header: Add check_perf_magic() func

On Mon, 24 Sep 2012 23:24:09 +0800, Feng Tang wrote:
[snip]
> +/* Return 0 if matched */
> +int check_perf_magic(u64 magic)
> +{
> +	if (!memcmp(&magic, __perf_magic1, sizeof(magic))
> +		|| magic == __perf_magic2
> +		|| magic == __perf_magic2_sw)
> +		return 0;
> +
> +	return -1;
> +}

Just an idea.  How about returning version number instead of 0 so that
it can be used elsewhere those check is needed and possibly wants to
know the version number also?

Thanks,
Namhyung
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