# git rev-parse -q --verify e91ef5bcdeda8956eb9f1972ed90198b698dca0f^{commit}
e91ef5bcdeda8956eb9f1972ed90198b698dca0f
already have revision, skipping fetch
# git checkout -q -f -B kisskb e91ef5bcdeda8956eb9f1972ed90198b698dca0f
# git clean -qxdf
# < git log -1
# commit e91ef5bcdeda8956eb9f1972ed90198b698dca0f
# Author: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
# Date:   Fri Oct 11 18:22:37 2019 +0200
# 
#     Linux 5.2.21
# < /opt/cross/kisskb/korg/gcc-4.9.4-nolibc/powerpc64-linux/bin/powerpc64-linux-gcc --version
# < /opt/cross/kisskb/korg/gcc-4.9.4-nolibc/powerpc64-linux/bin/powerpc64-linux-ld --version
# < git log --format=%s --max-count=1 e91ef5bcdeda8956eb9f1972ed90198b698dca0f
# < make -s -j 48 ARCH=powerpc O=/kisskb/build/stable-5.2_g5_defconfig_powerpc-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/powerpc64-linux/bin/powerpc64-linux-  g5_defconfig
# < make -s -j 48 ARCH=powerpc O=/kisskb/build/stable-5.2_g5_defconfig_powerpc-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/powerpc64-linux/bin/powerpc64-linux-  help
# make -s -j 48 ARCH=powerpc O=/kisskb/build/stable-5.2_g5_defconfig_powerpc-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/powerpc64-linux/bin/powerpc64-linux-  olddefconfig
# make -s -j 48 ARCH=powerpc O=/kisskb/build/stable-5.2_g5_defconfig_powerpc-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/powerpc64-linux/bin/powerpc64-linux-  
WARNING: vmlinux.o(.text+0x30ba): Section mismatch in reference from the variable start_here_multiplatform to the function .init.text:.early_setup()
The function start_here_multiplatform() references
the function __init .early_setup().
This is often because start_here_multiplatform lacks a __init 
annotation or the annotation of .early_setup is wrong.

Completed OK
# rm -rf /kisskb/build/stable-5.2_g5_defconfig_powerpc-gcc4.9
# Build took: 0:01:40.980062