linux-kernel - Re: [PATCH 2/2] x86, powerpc: remove -funit-at-a-time compiler option entirely

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Message-ID: <CAK7LNARbzF9-ZYvX7U76HqC957Fj=U3rmQfCEYXKqZNV8SFmNg@mail.gmail.com>
Date:   Sat, 8 Dec 2018 15:36:52 +0900
From:   Masahiro Yamada <yamada.masahiro@...ionext.com>
To:     Ingo Molnar <mingo@...hat.com>,
        Thomas Gleixner <tglx@...utronix.de>, X86 ML <x86@...nel.org>
Cc:     Richard Weinberger <richard@...ma-star.at>,
        linuxppc-dev <linuxppc-dev@...ts.ozlabs.org>,
        "H. Peter Anvin" <hpa@...or.com>, Borislav Petkov <bp@...en8.de>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Paul Mackerras <paulus@...ba.org>,
        Michael Ellerman <mpe@...erman.id.au>
Subject: Re: [PATCH 2/2] x86, powerpc: remove -funit-at-a-time compiler option entirely

x86 maintainers,

Ping.



On Mon, Nov 12, 2018 at 8:23 PM Michael Ellerman <mpe@...erman.id.au> wrote:
>
> Masahiro Yamada <yamada.masahiro@...ionext.com> writes:
>
> > GCC 4.6 manual says:
> >
> > -funit-at-a-time
> >   This option is left for compatibility reasons. -funit-at-a-time has
> >   no effect, while -fno-unit-at-a-time implies -fno-toplevel-reorder
> >   and -fno-section-anchors.
> >   Enabled by default.
> >
> > Signed-off-by: Masahiro Yamada <yamada.masahiro@...ionext.com>
> > ---
> >
> >  arch/powerpc/Makefile | 4 ----
> >  arch/x86/Makefile     | 4 ----
> >  arch/x86/Makefile.um  | 5 -----
> >  3 files changed, 13 deletions(-)
> >
> > diff --git a/arch/powerpc/Makefile b/arch/powerpc/Makefile
> > index 8a2ce14..854199c 100644
> > --- a/arch/powerpc/Makefile
> > +++ b/arch/powerpc/Makefile
> > @@ -228,10 +228,6 @@ KBUILD_CFLAGS += $(call cc-option,-mno-vsx)
> >  KBUILD_CFLAGS += $(call cc-option,-mno-spe)
> >  KBUILD_CFLAGS += $(call cc-option,-mspe=no)
> >
> > -# Enable unit-at-a-time mode when possible. It shrinks the
> > -# kernel considerably.
> > -KBUILD_CFLAGS += $(call cc-option,-funit-at-a-time)
> > -
>
> Thanks for cleaning it up.
>
> Acked-by: Michael Ellerman <mpe@...erman.id.au>
>
> cheers



-- 
Best Regards
Masahiro Yamada