# git rev-parse -q --verify 4c25df5640ae6e4491ee2c50d3f70c1559ef037d^{commit}
4c25df5640ae6e4491ee2c50d3f70c1559ef037d
already have revision, skipping fetch
# git checkout -q -f -B kisskb 4c25df5640ae6e4491ee2c50d3f70c1559ef037d
# git clean -qxdf
# < git log -1
# commit 4c25df5640ae6e4491ee2c50d3f70c1559ef037d
# Merge: 34b5a946a954 3d7dfd632f9b
# Author: Michael Ellerman <mpe@ellerman.id.au>
# Date:   Sat Feb 1 21:47:17 2020 +1100
# 
#     Merge branch 'topic/user-access-begin' into next
#     
#     Merge the user_access_begin() series from Christophe. This is based on
#     a commit from Linus that went into v5.5-rc7.
# < /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 4c25df5640ae6e4491ee2c50d3f70c1559ef037d
# < make -s -j 48 ARCH=powerpc O=/kisskb/build/powerpc-next_powernv_defconfig+NO_PERF_ppc64le-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
# yes \n | make -s -j 48 ARCH=powerpc O=/kisskb/build/powerpc-next_powernv_defconfig+NO_PERF_ppc64le-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  oldconfig
yes: standard output: Broken pipe
# make -s -j 48 ARCH=powerpc O=/kisskb/build/powerpc-next_powernv_defconfig+NO_PERF_ppc64le-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  
WARNING: 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/powerpc-next_powernv_defconfig+NO_PERF_ppc64le-gcc5
# Build took: 0:02:51.479220