Re: [PATCH v6 3/4] perf,x86: add Intel RAPL PMU support

[Peter Zijlstra]

On Fri, Nov 08, 2013 at 08:46:02PM +0100, Stephane Eranian wrote:


> +static DEFINE_SPINLOCK(rapl_hotplug_lock);

What is this thing protecting?

Like last time it appears to be used only from hotplug notifier
callbacks and those are already fully serialized.

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