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From:   Naresh Kamboju <naresh.kamboju@linaro.org>
Date:   Tue, 7 Sep 2021 11:44:23 +0530
Message-ID: <CA+G9fYv_guwJLpk+8poPKsSw7NOxw9-AXuEDy=iceXimfStxfQ@mail.gmail.com>
Subject: Re: kernel/kexec_file.o: failed: Cannot find symbol for section 10: .text.unlikely.
To:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc:     Eric Biederman <ebiederm@xmission.com>, kexec@lists.infradead.org,
        open list <linux-kernel@vger.kernel.org>,
        linux-stable <stable@vger.kernel.org>,
        Sasha Levin <sashal@kernel.org>, lkft-triage@lists.linaro.org
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> > > > Is this a regression?  Has this compiler ever been able to build this
> > > > arch like this?
> > >
> > > Yes. It is a regression with gcc-11.
> > >
> > > stable rc Linux 5.13.14 with gcc-11 - powerpc - FAILED
> > > stable rc Linux 5.13.14 with gcc-10 - powerpc - PASSED
> >
> > Ah, ok, and does 5.14 or newer work properly?
>
> No.
> stable rc Linux 5.14.1-rc1 with gcc-11 - powerpc - FAILED
> stable rc Linux 5.14.1-rc1 with gcc-10 - powerpc - PASS
>
>
> I will check Linux mainline and Linux next and get back to you.

Since we started building with gcc-11 last weekend and started
noticing these build failures on stable-rc, mainline and next.
and today's stable-rc review also failed with these combinations.

Linux next master with gcc-11 - powerpc-defconfig - FAILED
Linux mainline master with gcc-11 - powerpc-defconfig - FAILED
stable rc Linux 5.14.2-rc1 with gcc-11 - powerpc-defconfig - FAILED
stable rc Linux 5.13.15-rc1 with gcc-11 - powerpc-defconfig - FAILED
stable rc Linux 5.10.63-rc1 with gcc-11 - powerpc-defconfig - FAILED

FYI,
The following powerpc config build PASS with gcc-11
  - allnoconfig
  - mpc83xx_defconfig
  - tqm8xx_defconfig
  - maple_defconfig
  - cell_defconfig
  - ppc64e_defconfig
  - ppc6xx_defconfig


- Naresh