linux-kernel - Re: [PATCH v2 2/2] kbuild: Disable CONFIG_LD_ORPHAN

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Message-ID: <CAK7LNAR=_+1K7EtpvGzgyM+ans-iNOT0PBXdLRApnsyAzakQ3w@mail.gmail.com>
Date:   Tue, 1 Dec 2020 22:31:37 +0900
From:   Masahiro Yamada <masahiroy@...nel.org>
To:     Kees Cook <keescook@...omium.org>
Cc:     Nick Desaulniers <ndesaulniers@...gle.com>,
        Nathan Chancellor <natechancellor@...il.com>,
        Michal Marek <michal.lkml@...kovi.net>,
        Russell King <linux@...linux.org.uk>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>,
        Michael Ellerman <mpe@...erman.id.au>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        "maintainer:X86 ARCHITECTURE (32-BIT AND 64-BIT)" <x86@...nel.org>,
        Arvind Sankar <nivedita@...m.mit.edu>,
        LKML <linux-kernel@...r.kernel.org>,
        Linux Kbuild mailing list <linux-kbuild@...r.kernel.org>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        linuxppc-dev <linuxppc-dev@...ts.ozlabs.org>,
        clang-built-linux <clang-built-linux@...glegroups.com>,
        "kernelci . org bot" <bot@...nelci.org>,
        Mark Brown <broonie@...nel.org>
Subject: Re: [PATCH v2 2/2] kbuild: Disable CONFIG_LD_ORPHAN_WARN for ld.lld 10.0.1

On Wed, Nov 25, 2020 at 7:22 AM Kees Cook <keescook@...omium.org> wrote:
>
> On Thu, Nov 19, 2020 at 01:13:27PM -0800, Nick Desaulniers wrote:
> > On Thu, Nov 19, 2020 at 12:57 PM Nathan Chancellor
> > <natechancellor@...il.com> wrote:
> > >
> > > ld.lld 10.0.1 spews a bunch of various warnings about .rela sections,
> > > along with a few others. Newer versions of ld.lld do not have these
> > > warnings. As a result, do not add '--orphan-handling=warn' to
> > > LDFLAGS_vmlinux if ld.lld's version is not new enough.
> > >
> > > Link: https://github.com/ClangBuiltLinux/linux/issues/1187
> > > Link: https://github.com/ClangBuiltLinux/linux/issues/1193
> > > Reported-by: Arvind Sankar <nivedita@...m.mit.edu>
> > > Reported-by: kernelci.org bot <bot@...nelci.org>
> > > Reported-by: Mark Brown <broonie@...nel.org>
> > > Reviewed-by: Kees Cook <keescook@...omium.org>
> > > Signed-off-by: Nathan Chancellor <natechancellor@...il.com>
> >
> > Thanks for the additions in v2.
> > Reviewed-by: Nick Desaulniers <ndesaulniers@...gle.com>
>
> I'm going to carry this for a few days in -next, and if no one screams,
> ask Linus to pull it for v5.10-rc6.
>
> Thanks!
>
> --
> Kees Cook


Sorry for the delay.
Applied to linux-kbuild.

But, I already see this in linux-next.

Please let me know if I should drop it from my tree.


-- 
Best Regards
Masahiro Yamada