linux-kernel - Re: kernel/kexec_file.o: failed: Cannot find symbol for section 10: .text.unlikely.

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Date:   Tue, 7 Sep 2021 11:44:23 +0530
From:   Naresh Kamboju <naresh.kamboju@...aro.org>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     Eric Biederman <ebiederm@...ssion.com>, kexec@...ts.infradead.org,
        open list <linux-kernel@...r.kernel.org>,
        linux-stable <stable@...r.kernel.org>,
        Sasha Levin <sashal@...nel.org>, lkft-triage@...ts.linaro.org
Subject: Re: kernel/kexec_file.o: failed: Cannot find symbol for section 10: .text.unlikely.

> > > > 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