# git rev-parse -q --verify 28d0c8c0a7caebf09a3b4058cbea7416c0a8f334^{commit}
28d0c8c0a7caebf09a3b4058cbea7416c0a8f334
already have revision, skipping fetch
# git checkout -q -f -B kisskb 28d0c8c0a7caebf09a3b4058cbea7416c0a8f334
# git clean -qxdf
# < git log -1
# commit 28d0c8c0a7caebf09a3b4058cbea7416c0a8f334
# Author: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
# Date:   Fri Jan 24 10:27:54 2020 +0100
# 
#     Linux 5.4.15-rc1
# < /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 28d0c8c0a7caebf09a3b4058cbea7416c0a8f334
# < make -s -j 80 ARCH=powerpc O=/kisskb/build/stable-rc-5.4_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 80 ARCH=powerpc O=/kisskb/build/stable-rc-5.4_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 80 ARCH=powerpc O=/kisskb/build/stable-rc-5.4_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/stable-rc-5.4_powernv_defconfig+NO_PERF_ppc64le-gcc5
# Build took: 0:02:54.450052