linux-kernel - Re: [PATCH] compiler: allow all arches to enable CONFIG_OPTIMIZE

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Message-ID: <CAK7LNAQyjhDaLk_9W65=s4jfPN_AAELuGSZRAs4Xup4Xj79CGQ@mail.gmail.com>
Date:   Tue, 23 Apr 2019 12:26:03 +0900
From:   Masahiro Yamada <yamada.masahiro@...ionext.com>
To:     Christophe Leroy <christophe.leroy@....fr>
Cc:     linux-arch <linux-arch@...r.kernel.org>,
        linux-s390 <linux-s390@...r.kernel.org>,
        Dave Hansen <dave@...1.net>, Arnd Bergmann <arnd@...db.de>,
        "the arch/x86 maintainers" <x86@...nel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        linux-mips@...r.kernel.org, Paul Burton <paul.burton@...s.com>,
        Ingo Molnar <mingo@...hat.com>,
        linux-mtd <linux-mtd@...ts.infradead.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        linuxppc-dev <linuxppc-dev@...ts.ozlabs.org>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH] compiler: allow all arches to enable CONFIG_OPTIMIZE_INLINING

Hi Christophe,

On Tue, Mar 26, 2019 at 3:03 PM Christophe Leroy
<christophe.leroy@....fr> wrote:
>
> Hi Masahiro,
>
> Le 25/03/2019 à 07:44, Masahiro Yamada a écrit :
> > Hi Christophe,
> >
> >
> > On Sat, Mar 23, 2019 at 5:27 PM LEROY Christophe
> > <christophe.leroy@....fr> wrote:
> >>
> >> Arnd Bergmann <arnd@...db.de> a écrit :
> >>
> >>> On Wed, Mar 20, 2019 at 10:41 AM Arnd Bergmann <arnd@...db.de> wrote:
> >>>>
> >>>> I've added your patch to my randconfig test setup and will let you
> >>>> know if I see anything noticeable. I'm currently testing clang-arm32,
> >>>> clang-arm64 and gcc-x86.
> >>>
> >>> This is the only additional bug that has come up so far:
> >>>
> >>> `.exit.text' referenced in section `.alt.smp.init' of
> >>> drivers/char/ipmi/ipmi_msghandler.o: defined in discarded section
> >>> `exit.text' of drivers/char/ipmi/ipmi_msghandler.o
> >>
> >> Wouldn't it be useful to activate -Winline gcc warning to ease finding
> >> out problematic usage of inline keyword ?
> >
> >
> > Yes, it is useful to find out
> > which function is causing the error.
> > Thanks for the tip.
> >
>
> I did a mass build on kisskb. Almost ok, see results at
> http://kisskb.ellerman.id.au/kisskb/head/203d912edf8dde291977c71aa64024065e197f79/
>
> ps3_defconfig with GCC 5 fails
> (http://kisskb.ellerman.id.au/kisskb/buildresult/13742711/) with:
>
> arch/powerpc/mm/tlb-radix.c:148:2: error: asm operand 3 probably doesn't
> match constraints [-Werror]
> arch/powerpc/mm/tlb-radix.c:148:2: error: impossible constraint in 'asm'
> arch/powerpc/mm/tlb-radix.c:118:2: error: asm operand 3 probably doesn't
> match constraints [-Werror]
> arch/powerpc/mm/tlb-radix.c:104:2: error: asm operand 3 probably doesn't
> match constraints [-Werror]
>
> ps3_defconfig with GCC 4.6 fails
> (http://kisskb.ellerman.id.au/kisskb/buildresult/13742591/) with:
>
> arch/powerpc/mm/tlb-radix.c:148:2: error: asm operand 3 probably doesn't
> match constraints [-Werror]
> arch/powerpc/mm/tlb-radix.c:118:2: error: asm operand 3 probably doesn't
> match constraints [-Werror]
> arch/powerpc/mm/tlb-radix.c:104:2: error: asm operand 3 probably doesn't
> match constraints [-Werror]
>
> randconfig with GCC 4.6 fails
> (http://kisskb.ellerman.id.au/kisskb/buildresult/13742698/) with:
>
> arch/powerpc/mm/tlb-radix.c:104:2: error: impossible constraint in 'asm'


Thanks.

I fixed these ppc errors,
and separate out arch-fixes.

Now, the latest version is v3.


-- 
Best Regards
Masahiro Yamada