linux-kernel - Re: [PATCH v3 3/4] perf,x86: add Intel RAPL PMU support

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Date:	Fri, 25 Oct 2013 13:13:39 +0200
From:	Jiri Olsa <jolsa@...hat.com>
To:	Stephane Eranian <eranian@...gle.com>
Cc:	linux-kernel@...r.kernel.org, peterz@...radead.org, mingo@...e.hu,
	ak@...ux.intel.com, acme@...hat.com, zheng.z.yan@...el.com,
	bp@...en8.de
Subject: Re: [PATCH v3 3/4] perf,x86: add Intel RAPL PMU support

On Wed, Oct 23, 2013 at 02:58:04PM +0200, Stephane Eranian wrote:

SNIP

> +
> +	perf_cpu_notifier(rapl_cpu_notifier);
> +
> +	ret = perf_pmu_register(&rapl_pmu_class, "power", -1);
> +	WARN_ON(ret);
> +	if (!ret) {
> +		pr_info("RAPL PMU detected, registration failed, RAPL PMU disabled\n");
> +		put_online_cpus();
> +		return -1;
> +	}

should above rather be:

        if (WARN_ON(ret)) {
                pr_info("RAPL PMU detected, registration failed, RAPL PMU disabled\n");

jirka
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