From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: Anders Roxell <anders.roxell@linaro.org>
Cc: Naresh Kamboju <naresh.kamboju@linaro.org>,
perf-users <perf-users@linaro.org>,
open list <linux-kernel@vger.kernel.org>,
linux-stable <stable@vger.kernel.org>,
Arnaldo Carvalho de Melo <acme@kernel.org>,
Ingo Molnar <mingo@redhat.com>,
Peter Zijlstra <peterz@infradead.org>,
Sasha Levin <sashal@kernel.org>, Leo Yan <leo.yan@linaro.org>
Subject: Re: perf: bench/sched-messaging.c:73:13: error: 'dummy' may be used uninitialized
Date: Thu, 15 Jul 2021 13:05:58 +0200 [thread overview]
Message-ID: <YPAWlsL4a5uqrDWU@kroah.com> (raw)
In-Reply-To: <CADYN=9+vr=xHsY8yinyWUTN+xyEG=v8-xf4y2psDarFKWDU6xA@mail.gmail.com>
On Tue, Jul 13, 2021 at 05:32:17PM +0200, Anders Roxell wrote:
> On Tue, 13 Jul 2021 at 17:18, Greg Kroah-Hartman
> <gregkh@linuxfoundation.org> wrote:
> >
> > 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!
>
> You were correct, I did a bisect [1] and found
> d493720581a6 ("perf bench: Fix 2 memory sanitizer warnings").
>
> commit d2c73501a767514b6c85c7feff9457a165d51057 upstream.
>
> Cherry picked it and I was able to build it on arm64 and x86.
Great, now queued up, thanks.
greg k-h
prev parent reply other threads:[~2021-07-15 11:06 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-07-13 15:10 perf: bench/sched-messaging.c:73:13: error: 'dummy' may be used uninitialized Naresh Kamboju
2021-07-13 15:17 ` Greg Kroah-Hartman
2021-07-13 15:32 ` Anders Roxell
2021-07-15 11:05 ` Greg Kroah-Hartman [this message]
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