# git rev-parse -q --verify 2d636a1263be81f89412548a31f9cbbfef746b9c^{commit}
2d636a1263be81f89412548a31f9cbbfef746b9c
already have revision, skipping fetch
# git checkout -q -f -B kisskb 2d636a1263be81f89412548a31f9cbbfef746b9c
# git clean -qxdf
# < git log -1
# commit 2d636a1263be81f89412548a31f9cbbfef746b9c
# Author: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
# Date:   Wed Feb 19 19:53:10 2020 +0100
# 
#     Linux 5.4.21
# < /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 2d636a1263be81f89412548a31f9cbbfef746b9c
# < make -s -j 24 ARCH=powerpc O=/kisskb/build/stable-rc-5.4_powernv_defconfig_powerpc-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  powernv_defconfig
# make -s -j 24 ARCH=powerpc O=/kisskb/build/stable-rc-5.4_powernv_defconfig_powerpc-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/stable-rc-5.4_powernv_defconfig_powerpc-gcc5
# Build took: 0:03:32.818390