linux-kernel - gfp.h:20:32: error: redefinition of typedef 'gfp

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Message-ID: <CA+G9fYsb0LRBatwtbjULObmc4zA6SrYBE6W+S_AjxXedPwPdVQ@mail.gmail.com>
Date:   Mon, 22 Feb 2021 23:05:55 +0530
From:   Naresh Kamboju <naresh.kamboju@...aro.org>
To:     clang-built-linux <clang-built-linux@...glegroups.com>,
        Linux-Next Mailing List <linux-next@...r.kernel.org>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        open list <linux-kernel@...r.kernel.org>,
        lkft-triage@...ts.linaro.org
Cc:     Nick Desaulniers <ndesaulniers@...gle.com>,
        Nathan Chancellor <nathan@...nel.org>,
        Nathan Chancellor <natechancellor@...il.com>,
        Arnd Bergmann <arnd@...db.de>,
        Stephen Rothwell <sfr@...b.auug.org.au>
Subject: gfp.h:20:32: error: redefinition of typedef 'gfp_t' is a C11 feature

arm davinci_all_defconfig config with clang 10, 11 and 12 failing
on Linux next tag 20210222 due to below listed errors / warnings.

 - arm (davinci_all_defconfig) with clang-10
 - arm (davinci_all_defconfig) with clang-11
 - arm (davinci_all_defconfig) with clang-12

make --silent --keep-going --jobs=8
O=/home/tuxbuild/.cache/tuxmake/builds/1/tmp ARCH=arm
CROSS_COMPILE=arm-linux-gnueabihf- 'HOSTCC=sccache clang' 'CC=sccache
clang' davinci_all_defconfig

make --silent --keep-going --jobs=8
O=/home/tuxbuild/.cache/tuxmake/builds/1/tmp ARCH=arm
CROSS_COMPILE=arm-linux-gnueabihf- 'HOSTCC=sccache clang' 'CC=sccache
clang'


include/linux/gfp.h:20:32: error: redefinition of typedef 'gfp_t' is a
C11 feature [-Werror,-Wtypedef-redefinition]
typedef unsigned int __bitwise gfp_t;   // repeated here for kernel-doc
                               ^
include/linux/types.h:148:32: note: previous definition is here
typedef unsigned int __bitwise gfp_t;
                               ^
1 warning generated.
1 warning generated.
1 warning generated.
1 warning generated.
1 error generated.
make[5]: *** [scripts/Makefile.build:287:
drivers/gpu/drm/tilcdc/tilcdc_plane.o] Error 1

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

Step to reproduce:
---------------------------
# 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 arm --toolchain clang-10
--kconfig davinci_all_defconfig

build log,
https://builds.tuxbuild.com/1opbM56yvX4uyeXV8JBwFNz9WEQ/

-- 
Linaro LKFT
https://lkft.linaro.org