# git rev-parse -q --verify f566e1fbadb686e28f1c307e356114b2865ef588^{commit}
f566e1fbadb686e28f1c307e356114b2865ef588
already have revision, skipping fetch
# git checkout -q -f -B kisskb f566e1fbadb686e28f1c307e356114b2865ef588
# git clean -qxdf
# < git log -1
# commit f566e1fbadb686e28f1c307e356114b2865ef588
# Author: Masahiro Yamada <masahiroy@kernel.org>
# Date:   Wed Feb 5 15:51:52 2020 +0900
# 
#     kbuild: make multiple directory targets work
#     
#     Currently, the single-target build does not work when two
#     or more sub-directories are given:
#     
#       $ make fs/ kernel/ lib/
#         CALL    scripts/checksyscalls.sh
#         CALL    scripts/atomic/check-atomics.sh
#         DESCEND  objtool
#       make[2]: Nothing to be done for 'kernel/'.
#       make[2]: Nothing to be done for 'fs/'.
#       make[2]: Nothing to be done for 'lib/'.
#     
#     Make it work properly.
#     
#     Reported-by: Linus Torvalds <torvalds@linux-foundation.org>
#     Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
# < /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 f566e1fbadb686e28f1c307e356114b2865ef588
# < make -s -j 32 ARCH=powerpc O=/kisskb/build/kbuild_powernv_defconfig_ppc64le-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  powernv_defconfig
# make -s -j 32 ARCH=powerpc O=/kisskb/build/kbuild_powernv_defconfig_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/kbuild_powernv_defconfig_ppc64le-gcc5
# Build took: 0:03:21.756333