# git rev-parse -q --verify fd6988496e79a6a4bdb514a4655d2920209eb85d^{commit}
fd6988496e79a6a4bdb514a4655d2920209eb85d
already have revision, skipping fetch
# git checkout -q -f -B kisskb fd6988496e79a6a4bdb514a4655d2920209eb85d
# git clean -qxdf
# < git log -1
# commit fd6988496e79a6a4bdb514a4655d2920209eb85d
# Author: Linus Torvalds <torvalds@linux-foundation.org>
# Date:   Sun Dec 29 15:29:16 2019 -0800
# 
#     Linux 5.5-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 fd6988496e79a6a4bdb514a4655d2920209eb85d
# < make -s -j 8 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 8 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 8 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: 0:04:32.496507