linux-kernel - Re: [csky-linux:riscv_compat_v8 6/20] arch/arm64/include/asm/compat.h:69:8: error: redefinition of 'struct compat

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Message-ID: <CAK8P3a2C0Mek0LMBoAWJLeo1t48VDyNWy1UjHLHh2UVoJ1crwQ@mail.gmail.com>
Date:   Wed, 16 Mar 2022 14:13:52 +0100
From:   Arnd Bergmann <arnd@...db.de>
To:     Guo Ren <guoren@...ux.alibaba.com>
Cc:     kbuild-all@...ts.01.org,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Arnd Bergmann <arnd@...db.de>, Christoph Hellwig <hch@....de>,
        kernel test robot <lkp@...el.com>
Subject: Re: [csky-linux:riscv_compat_v8 6/20] arch/arm64/include/asm/compat.h:69:8:
 error: redefinition of 'struct compat_statfs'

On Wed, Mar 16, 2022 at 1:55 PM kernel test robot <lkp@...el.com> wrote:
>
> tree:   https://github.com/c-sky/csky-linux riscv_compat_v8
> head:   5e16532e9a75c08518ff196285fe079ee12188ae
> commit: 257ecf6f5f6391f6a88aa6fa19e33d09d686e704 [6/20] asm-generic: compat: Cleanup duplicate definitions
> config: arm64-defconfig (https://download.01.org/0day-ci/archive/20220316/202203162054.pQFA2Y1M-lkp@intel.com/config)
> compiler: aarch64-linux-gcc (GCC) 11.2.0
> reproduce (this is a W=1 build):
>         wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
>         chmod +x ~/bin/make.cross
>         # https://github.com/c-sky/csky-linux/commit/257ecf6f5f6391f6a88aa6fa19e33d09d686e704
>         git remote add csky-linux https://github.com/c-sky/csky-linux
>         git fetch --no-tags csky-linux riscv_compat_v8
>         git checkout 257ecf6f5f6391f6a88aa6fa19e33d09d686e704
>         # save the config file to linux build tree
>         mkdir build_dir
>         COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross O=build_dir ARCH=arm64 prepare
>
> If you fix the issue, kindly add following tag as appropriate
> Reported-by: kernel test robot <lkp@...el.com>
>
> All errors (new ones prefixed by >>):
>
>    In file included from arch/arm64/include/asm/stat.h:13,
>                     from include/linux/stat.h:6,
>                     from include/linux/sysfs.h:22,
>                     from include/linux/kobject.h:20,
>                     from include/linux/of.h:17,
>                     from include/linux/irqdomain.h:35,
>                     from include/linux/acpi.h:13,
>                     from include/acpi/apei.h:9,
>                     from include/acpi/ghes.h:5,
>                     from include/linux/arm_sdei.h:8,
>                     from arch/arm64/kernel/asm-offsets.c:10:
> >> arch/arm64/include/asm/compat.h:69:8: error: redefinition of 'struct compat_statfs'
>       69 | struct compat_statfs {
>          |        ^~~~~~~~~~~~~
>    In file included from arch/arm64/include/asm/compat.h:18,
>                     from arch/arm64/include/asm/stat.h:13,
>                     from include/linux/stat.h:6,
>                     from include/linux/sysfs.h:22,
>                     from include/linux/kobject.h:20,
>                     from include/linux/of.h:17,
>                     from include/linux/irqdomain.h:35,
>                     from include/linux/acpi.h:13,
>                     from include/acpi/apei.h:9,
>                     from include/acpi/ghes.h:5,
>                     from include/linux/arm_sdei.h:8,
>                     from arch/arm64/kernel/asm-offsets.c:10:
>    include/asm-generic/compat.h:80:8: note: originally defined here
>       80 | struct compat_statfs {

The arch/arm64/include/asm/compat.h header defines its own
compat_statfs structure, but is missing a #define for it ahead of
the #include <asm-generic/compat.h> to prevent the second
definition.

     Arnd