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From:   Masahiro Yamada <masahiroy@kernel.org>
Date:   Wed, 2 Dec 2020 11:37:38 +0900
Message-ID: <CAK7LNAQGqcCBBFbKwe_eTuBqtNwDn_q8c0nPBJVsEoHP6F+aKA@mail.gmail.com>
Subject: Re: [PATCH v2 2/2] kbuild: Disable CONFIG_LD_ORPHAN_WARN for ld.lld 10.0.1
To:     Kees Cook <keescook@chromium.org>
Cc:     Nick Desaulniers <ndesaulniers@google.com>,
        Nathan Chancellor <natechancellor@gmail.com>,
        Michal Marek <michal.lkml@markovi.net>,
        Russell King <linux@armlinux.org.uk>,
        Catalin Marinas <catalin.marinas@arm.com>,
        Will Deacon <will@kernel.org>,
        Michael Ellerman <mpe@ellerman.id.au>,
        Thomas Gleixner <tglx@linutronix.de>,
        Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
        "maintainer:X86 ARCHITECTURE (32-BIT AND 64-BIT)" <x86@kernel.org>,
        Arvind Sankar <nivedita@alum.mit.edu>,
        LKML <linux-kernel@vger.kernel.org>,
        Linux Kbuild mailing list <linux-kbuild@vger.kernel.org>,
        Linux ARM <linux-arm-kernel@lists.infradead.org>,
        linuxppc-dev <linuxppc-dev@lists.ozlabs.org>,
        clang-built-linux <clang-built-linux@googlegroups.com>,
        "kernelci . org bot" <bot@kernelci.org>,
        Mark Brown <broonie@kernel.org>
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On Wed, Dec 2, 2020 at 5:56 AM Kees Cook <keescook@chromium.org> wrote:
>
> On Tue, Dec 01, 2020 at 10:31:37PM +0900, Masahiro Yamada wrote:
> > On Wed, Nov 25, 2020 at 7:22 AM Kees Cook <keescook@chromium.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@gmail.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@alum.mit.edu>
> > > > > Reported-by: kernelci.org bot <bot@kernelci.org>
> > > > > Reported-by: Mark Brown <broonie@kernel.org>
> > > > > Reviewed-by: Kees Cook <keescook@chromium.org>
> > > > > Signed-off-by: Nathan Chancellor <natechancellor@gmail.com>
> > > >
> > > > Thanks for the additions in v2.
> > > > Reviewed-by: Nick Desaulniers <ndesaulniers@google.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.
>
> Great, thanks!
>
> > But, I already see this in linux-next.
> > Please let me know if I should drop it from my tree.
>
> My intention was to get this to Linus this week. Do you want to do that
> yourself, or Ack the patches in my tree and I'll send it?
>
> -Kees
>
> --
> Kees Cook


I will send a kbuild pull request myself this week.


-- 
Best Regards
Masahiro Yamada