linux-kernel - Re: [PATCH v5 0/3] x86: stack alignment for boot code and clang

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Message-ID: <CAK7LNAR42bAD_jX2esGquRUDcjLMEdrw9wp76qhP36gkQrKWew@mail.gmail.com>
Date:   Sun, 25 Jun 2017 13:04:20 +0900
From:   Masahiro Yamada <yamada.masahiro@...ionext.com>
To:     Ingo Molnar <mingo@...nel.org>
Cc:     Matthias Kaehlcke <mka@...omium.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>,
        "H . Peter Anvin" <hpa@...or.com>,
        "H . J . Lu" <hjl.tools@...il.com>,
        David Woodhouse <dwmw2@...radead.org>,
        Michal Marek <mmarek@...e.com>, X86 ML <x86@...nel.org>,
        Linux Kbuild mailing list <linux-kbuild@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Michael Davidson <md@...gle.com>,
        Greg Hackmann <ghackmann@...gle.com>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Stephen Hines <srhines@...gle.com>,
        Kees Cook <keescook@...omium.org>,
        Arnd Bergmann <arnd@...db.de>,
        Bernhard Rosenkränzer 
        <Bernhard.Rosenkranzer@...aro.org>,
        Peter Foley <pefoley2@...oley.com>,
        Behan Webster <behanw@...verseincode.com>,
        Douglas Anderson <dianders@...omium.org>
Subject: Re: [PATCH v5 0/3] x86: stack alignment for boot code and clang

2017-06-22 17:58 GMT+09:00 Ingo Molnar <mingo@...nel.org>:
>
> * Matthias Kaehlcke <mka@...omium.org> wrote:
>
>> This series fixes an issue with the stack of the x86 boot code not
>> being aligned as intended. Further it adapts the Makefile to account
>> for the fact that clang uses a different option to configure the
>> stack alignment than gcc (-mstack-alignment=N vs
>> -mpreferred-stack-boundary=N)
>>
>> Collaterally the series adds the new kbuild macro __cc-option and
>> refactors the macros cc-option and hostcc-option to make use of
>> __cc-option.
>>
>> Matthias Kaehlcke (3):
>>   kbuild: Add __cc-option macro
>>   x86/build: Use __cc-option for boot code compiler options
>>   x86/build: Specify stack alignment for clang
>>
>>  Makefile               |  2 +-
>>  arch/x86/Makefile      | 33 +++++++++++++++++++++++++--------
>>  scripts/Kbuild.include | 14 ++++++++++++--
>>  scripts/Makefile.host  |  6 ------
>>  4 files changed, 38 insertions(+), 17 deletions(-)
>
> So given that there are non-trivial kbuild changes here, I'd suggest these patches
> might have a better home in the kbuild tree. For the x86 bits:
>
> Acked-by: Ingo Molnar <mingo@...nel.org>
>
> Thanks,
>
>         Ingo
> --
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Series applied to linux-kbuild/kbuild.




-- 
Best Regards
Masahiro Yamada