# git rev-parse -q --verify 51e406417950d9a614ddbb1d7769ea210b8717b0^{commit}
51e406417950d9a614ddbb1d7769ea210b8717b0
already have revision, skipping fetch
# git checkout -q -f -B kisskb 51e406417950d9a614ddbb1d7769ea210b8717b0
# git clean -qxdf
# < git log -1
# commit 51e406417950d9a614ddbb1d7769ea210b8717b0
# Author: Masahiro Yamada <masahiroy@kernel.org>
# Date:   Thu Mar 12 07:37:24 2020 +0900
# 
#     sparc: revive __HAVE_ARCH_STRLEN for 32bit sparc
#     
#     Prior to commit 70a6fcf3283a ("[sparc] unify 32bit and 64bit string.h"),
#     __HAVE_ARCH_STRLEN was defined in both of string_32.h and string_64.h
#     
#     It did not unify __HAVE_ARCH_STRLEN, but deleted it from string_32.h
#     
#     This issue was reported by the kbuild test robot in the trial of
#     forcible linking of $(lib-y) to vmlinux.
#     
#     Fixes: 70a6fcf3283a ("[sparc] unify 32bit and 64bit string.h")
#     Reported-by: kbuild test robot <lkp@intel.com>
#     Suggested-by: Nick Desaulniers <ndesaulniers@google.com>
#     Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
#     Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
#     Acked-by: David S. Miller <davem@davemloft.net>
# < /opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-gcc --version
# < /opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-ld --version
# < git log --format=%s --max-count=1 51e406417950d9a614ddbb1d7769ea210b8717b0
# < make -s -j 32 ARCH=powerpc O=/kisskb/build/kbuild_powernv_defconfig+NO_PERF_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  powernv_defconfig
# Added to kconfig CONFIG_PERF_EVENTS=n
# < make -s -j 32 ARCH=powerpc O=/kisskb/build/kbuild_powernv_defconfig+NO_PERF_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  help
# make -s -j 32 ARCH=powerpc O=/kisskb/build/kbuild_powernv_defconfig+NO_PERF_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  olddefconfig
# make -s -j 32 ARCH=powerpc O=/kisskb/build/kbuild_powernv_defconfig+NO_PERF_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  
WARNING: modpost: vmlinux.o(.text+0x2fc8): Section mismatch in reference from the variable start_here_common to the function .init.text:start_kernel()
The function start_here_common() references
the function __init start_kernel().
This is often because start_here_common lacks a __init 
annotation or the annotation of start_kernel is wrong.

Completed OK
# rm -rf /kisskb/build/kbuild_powernv_defconfig+NO_PERF_powerpc-gcc5
# Build took: 0:03:21.512685