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From:   Naresh Kamboju <naresh.kamboju@linaro.org>
Date:   Fri, 14 May 2021 15:15:41 +0530
Message-ID: <CA+G9fYv79t0+2W4Rt3wDkBShc4eY3M3utC5BHqUgGDwMYExYMw@mail.gmail.com>
Subject: Re: mmotm 2021-05-12-21-46 uploaded (arch/x86/mm/pgtable.c)
To:     Andrew Morton <akpm@linux-foundation.org>,
        Randy Dunlap <rdunlap@infradead.org>
Cc:     Christophe Leroy <christophe.leroy@csgroup.eu>,
        Mark Brown <broonie@kernel.org>, linux-fsdevel@vger.kernel.org,
        open list <linux-kernel@vger.kernel.org>,
        linux-mm <linux-mm@kvack.org>,
        Linux-Next Mailing List <linux-next@vger.kernel.org>,
        mhocko@suse.cz, mm-commits@vger.kernel.org,
        Stephen Rothwell <sfr@canb.auug.org.au>,
        lkft-triage@lists.linaro.org,
        Linux ARM <linux-arm-kernel@lists.infradead.org>
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On Fri, 14 May 2021 at 02:38, Randy Dunlap <rdunlap@infradead.org> wrote:
>
> On 5/13/21 1:47 PM, Andrew Morton wrote:
> > On Thu, 13 May 2021 19:09:23 +0200 Christophe Leroy <christophe.leroy@c=
sgroup.eu> wrote:
> >
> >>
> >>
> >>> on i386:
> >>>
> >>> ../arch/x86/mm/pgtable.c:703:5: error: redefinition of =E2=80=98pud_s=
et_huge=E2=80=99
> >>>   int pud_set_huge(pud_t *pud, phys_addr_t addr, pgprot_t prot)
> >>>       ^~~~~~~~~~~~
> >>> In file included from ../include/linux/mm.h:33:0,
> >>>                   from ../arch/x86/mm/pgtable.c:2:
> >>> ../include/linux/pgtable.h:1387:19: note: previous definition of =E2=
=80=98pud_set_huge=E2=80=99 was here
> >>>   static inline int pud_set_huge(pud_t *pud, phys_addr_t addr, pgprot=
_t prot)
> >>>                     ^~~~~~~~~~~~
> >>> ../arch/x86/mm/pgtable.c:758:5: error: redefinition of =E2=80=98pud_c=
lear_huge=E2=80=99
> >>>   int pud_clear_huge(pud_t *pud)
> >>>       ^~~~~~~~~~~~~~
> >>> In file included from ../include/linux/mm.h:33:0,
> >>>                   from ../arch/x86/mm/pgtable.c:2:
> >>> ../include/linux/pgtable.h:1391:19: note: previous definition of =E2=
=80=98pud_clear_huge=E2=80=99 was here
> >>>   static inline int pud_clear_huge(pud_t *pud)

These errors are noticed on linux next 20210514 tag on arm64.
Regressions found on arm64 for the following configs.

  - build/gcc-9-defconfig-904271f2
  - build/gcc-9-tinyconfig
  - build/gcc-8-allnoconfig
  - build/gcc-10-allnoconfig
  - build/clang-11-allnoconfig
  - build/clang-10-allnoconfig
  - build/clang-12-tinyconfig
  - build/gcc-10-tinyconfig
  - build/clang-10-tinyconfig
  - build/clang-11-tinyconfig
  - build/clang-12-allnoconfig
  - build/gcc-8-tinyconfig
  - build/gcc-9-allnoconfig

make --silent --keep-going --jobs=3D8
O=3D/home/tuxbuild/.cache/tuxmake/builds/current ARCH=3Darm64
CROSS_COMPILE=3Daarch64-linux-gnu- 'CC=3Dsccache aarch64-linux-gnu-gcc'
'HOSTCC=3Dsccache gcc'
/builds/linux/arch/arm64/mm/mmu.c:1341:5: error: redefinition of 'pud_set_h=
uge'
 1341 | int pud_set_huge(pud_t *pudp, phys_addr_t phys, pgprot_t prot)
      |     ^~~~~~~~~~~~
In file included from /builds/linux/include/linux/mm.h:33,
                 from /builds/linux/include/linux/pid_namespace.h:7,
                 from /builds/linux/include/linux/ptrace.h:10,
                 from /builds/linux/include/linux/elfcore.h:11,
                 from /builds/linux/include/linux/crash_core.h:6,
                 from /builds/linux/include/linux/kexec.h:18,
                 from /builds/linux/arch/arm64/mm/mmu.c:15:
/builds/linux/include/linux/pgtable.h:1387:19: note: previous
definition of 'pud_set_huge' was here
 1387 | static inline int pud_set_huge(pud_t *pud, phys_addr_t addr,
pgprot_t prot)
      |                   ^~~~~~~~~~~~
/builds/linux/arch/arm64/mm/mmu.c:1369:5: error: redefinition of
'pud_clear_huge'
 1369 | int pud_clear_huge(pud_t *pudp)
      |     ^~~~~~~~~~~~~~
In file included from /builds/linux/include/linux/mm.h:33,
                 from /builds/linux/include/linux/pid_namespace.h:7,
                 from /builds/linux/include/linux/ptrace.h:10,
                 from /builds/linux/include/linux/elfcore.h:11,
                 from /builds/linux/include/linux/crash_core.h:6,
                 from /builds/linux/include/linux/kexec.h:18,
                 from /builds/linux/arch/arm64/mm/mmu.c:15:
/builds/linux/include/linux/pgtable.h:1391:19: note: previous
definition of 'pud_clear_huge' was here
 1391 | static inline int pud_clear_huge(pud_t *pud)
      |                   ^~~~~~~~~~~~~~
make[3]: *** [/builds/linux/scripts/Makefile.build:273:
arch/arm64/mm/mmu.o] Error 1


Reported-by: Naresh Kamboju <naresh.kamboju@linaro.org>


Steps to reproduce:
---------------------------

#!/bin/sh

# TuxMake is a command line tool and Python library that provides
# portable and repeatable Linux kernel builds across a variety of
# architectures, toolchains, kernel configurations, and make targets.
#
# TuxMake supports the concept of runtimes.
# See https://docs.tuxmake.org/runtimes/, for that to work it requires
# that you install podman or docker on your system.
#
# To install tuxmake on your system globally:
# sudo pip3 install -U tuxmake
#
# See https://docs.tuxmake.org/ for complete documentation.

tuxmake --runtime podman --target-arch arm64 --toolchain gcc-9
--kconfig tinyconfig


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