linux-kernel - Re: perf: bench/sched-messaging.c:73:13: error: 'dummy' may be used uninitialized

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Date:   Tue, 13 Jul 2021 17:17:57 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     Naresh Kamboju <naresh.kamboju@...aro.org>
Cc:     perf-users <perf-users@...aro.org>,
        open list <linux-kernel@...r.kernel.org>,
        linux-stable <stable@...r.kernel.org>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        Ingo Molnar <mingo@...hat.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Sasha Levin <sashal@...nel.org>, Leo Yan <leo.yan@...aro.org>,
        Anders Roxell <anders.roxell@...aro.org>
Subject: Re: perf: bench/sched-messaging.c:73:13: error: 'dummy' may be used
 uninitialized

On Tue, Jul 13, 2021 at 08:40:28PM +0530, Naresh Kamboju wrote:
> LKFT have noticed these warnings / errors when we have updated gcc version from
> gcc-9 to gcc-11 on stable-rc linux-5.4.y branch. I have provided the steps to
> reproduce in this email below.
> 
> Following perf builds failed with gcc-11 with linux-5.4.y branch.
> - build-arm-gcc-11-perf
> - build-arm64-gcc-11-perf
> - build-i386-gcc-11-perf
> - build-x86-gcc-11-perf
> 
> Build error log:
> --------------------

<snip>

I imagine this is fixed in newer kernel versions, so if you could
provide the git ids of the patches needed to fix this up in 5.4, that
would be great!

thanks,

greg k-h