# git rev-parse -q --verify acfe9d882f586288f663aa73209f40e034003c13^{commit}
acfe9d882f586288f663aa73209f40e034003c13
already have revision, skipping fetch
# git checkout -q -f -B kisskb acfe9d882f586288f663aa73209f40e034003c13
# git clean -qxdf
# < git log -1
# commit acfe9d882f586288f663aa73209f40e034003c13
# Merge: 61676811351f 960786422fe9
# Author: Ingo Molnar <mingo@kernel.org>
# Date:   Mon Dec 30 08:11:51 2019 +0100
# 
#     Merge branch 'WIP.core/headers'
# < /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 acfe9d882f586288f663aa73209f40e034003c13
# < make -s -j 32 ARCH=x86 O=/kisskb/build/tip_x86_64_defconfig_x86_64-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/x86_64-linux/bin/x86_64-linux-  x86_64_defconfig
# make -s -j 32 ARCH=x86 O=/kisskb/build/tip_x86_64_defconfig_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
In file included from /kisskb/src/drivers/net/phy/mdio_bus.c:23:
/kisskb/src/include/linux/of_mdio.h:58:13: warning: 'of_mdiobus_child_is_phy' defined but not used [-Wunused-function]
 static bool of_mdiobus_child_is_phy(struct device_node *child)
             ^~~~~~~~~~~~~~~~~~~~~~~
Completed OK
# rm -rf /kisskb/build/tip_x86_64_defconfig_x86_64-gcc8
# Build took: 0:02:34.992892