# git rev-parse -q --verify b1fbfcb4a20949df08dd995927cdc5ad220c128d^{commit}
b1fbfcb4a20949df08dd995927cdc5ad220c128d
already have revision, skipping fetch
# git checkout -q -f -B kisskb b1fbfcb4a20949df08dd995927cdc5ad220c128d
# git clean -qxdf
# < git log -1
# commit b1fbfcb4a20949df08dd995927cdc5ad220c128d
# Author: Masahiro Yamada <yamada.masahiro@socionext.com>
# Date:   Mon Nov 18 13:52:47 2019 +0900
# 
#     kbuild: make single target builds even faster
#     
#     Commit 2dffd23f81a3 ("kbuild: make single target builds much faster")
#     made the situation much better.
#     
#     To improve it even more, apply the similar idea to the top Makefile.
#     Trim unrelated directories from build-dirs.
#     
#     The single build code must be moved above the 'descend' target.
#     
#     Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
#     Tested-by: Jens Axboe <axboe@kernel.dk>
# < /opt/cross/kisskb/korg/gcc-8.1.0-nolibc/x86_64-linux/bin/x86_64-linux-gcc --version
# < /opt/cross/kisskb/korg/gcc-8.1.0-nolibc/x86_64-linux/bin/x86_64-linux-ld --version
# < git log --format=%s --max-count=1 b1fbfcb4a20949df08dd995927cdc5ad220c128d
# < make -s -j 120 ARCH=x86 O=/kisskb/build/kbuild_x86-allmodconfig_x86_64-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/x86_64-linux/bin/x86_64-linux-  allmodconfig
# Added to kconfig CONFIG_BUILD_DOCSRC=n
# Added to kconfig CONFIG_MODULE_SIG=n
# Added to kconfig CONFIG_SAMPLES=n
# yes \n | make -s -j 120 ARCH=x86 O=/kisskb/build/kbuild_x86-allmodconfig_x86_64-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/x86_64-linux/bin/x86_64-linux-  oldconfig
yes: standard output: Broken pipe
# make -s -j 120 ARCH=x86 O=/kisskb/build/kbuild_x86-allmodconfig_x86_64-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/x86_64-linux/bin/x86_64-linux-  
/kisskb/src/tools/objtool
Completed OK
# rm -rf /kisskb/build/kbuild_x86-allmodconfig_x86_64-gcc8
# Build took: 0:13:16.167849