# git rev-parse -q --verify 7d194c2100ad2a6dded545887d02754948ca5241^{commit}
7d194c2100ad2a6dded545887d02754948ca5241
already have revision, skipping fetch
# git checkout -q -f -B kisskb 7d194c2100ad2a6dded545887d02754948ca5241
# git clean -qxdf
# < git log -1
# commit 7d194c2100ad2a6dded545887d02754948ca5241
# Author: Linus Torvalds <torvalds@linux-foundation.org>
# Date:   Sun Oct 20 15:56:22 2019 -0400
# 
#     Linux 5.4-rc4
# < /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 7d194c2100ad2a6dded545887d02754948ca5241
# < make -s -j 10 ARCH=powerpc O=/kisskb/build/linus_powernv_defconfig+THIN_ppc64le-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  powernv_defconfig
# Added to kconfig CONFIG_USE_THIN_ARCHIVES=y
# yes \n | make -s -j 10 ARCH=powerpc O=/kisskb/build/linus_powernv_defconfig+THIN_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 10 ARCH=powerpc O=/kisskb/build/linus_powernv_defconfig+THIN_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/linus_powernv_defconfig+THIN_ppc64le-gcc5
# Build took: 0:03:21.809863