linux-kernel - Re: perf/x86/amd/power missing pmu::module initialisation

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Message-ID: <20171107125046.GA10337@hr-amur2>
Date:   Tue, 7 Nov 2017 20:50:53 +0800
From:   Huang Rui <ray.huang@....com>
To:     Mark Rutland <mark.rutland@....com>
CC:     <linux-kernel@...r.kernel.org>
Subject: Re: perf/x86/amd/power missing pmu::module initialisation

Hi Mark,

On Fri, Nov 03, 2017 at 11:33:56AM +0000, Mark Rutland wrote:
> Hi,
> 
> As a heads-up, I believe that arch/x86/events/amd/power.c is currently
> missing initialisation of pmu::module, which could result in problems
> when the module is unloaded.
> 
> We've just spotted a similar problem in a couple of ARM PMUs, and AFAICT
> the AMD power PMU is the only other PMU affected.
> 
> Other modular PMUs all initialise this to THIS_MODULE prior to calling
> perf_pmu_register().
> 

Thanks to let me know. I have dived into pmu for quite a while. Could you
please share more information or forward related mail thread, so that I can
repro this issue in my side. :-)

Thanks,
Rui