# git rev-parse -q --verify 5d55c2adbefeb2d49d16891ed8ca8d03789fd31b^{commit}
# git fetch -q -n -f git://fs.ozlabs.ibm.com/kernel/stable linux-4.9.y
warning: The last gc run reported the following. Please correct the root cause
and remove .git/gc.log.
Automatic cleanup will not be performed until the file is removed.

warning: There are too many unreachable loose objects; run 'git prune' to remove them.

# git rev-parse -q --verify 5d55c2adbefeb2d49d16891ed8ca8d03789fd31b^{commit}
5d55c2adbefeb2d49d16891ed8ca8d03789fd31b
# git checkout -q -f -B kisskb 5d55c2adbefeb2d49d16891ed8ca8d03789fd31b
# git clean -qxdf
# < git log -1
# commit 5d55c2adbefeb2d49d16891ed8ca8d03789fd31b
# Author: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
# Date:   Wed Dec 2 08:31:29 2020 +0100
# 
#     Linux 4.9.247
#     
#     Tested-by: Jon Hunter <jonathanh@nvidia.com>
#     Tested-by: Guenter Roeck <linux@roeck-us.net>
#     Tested-by: Linux Kernel Functional Testing <lkft@linaro.org>
#     Link: https://lore.kernel.org/r/20201201084642.194933793@linuxfoundation.org
#     Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
# < /opt/cross/kisskb/br-aarch64-glibc-2016.08-613-ge98b4dd/bin/aarch64-linux-gcc --version
# < /opt/cross/kisskb/br-aarch64-glibc-2016.08-613-ge98b4dd/bin/aarch64-linux-ld --version
# < git log --format=%s --max-count=1 5d55c2adbefeb2d49d16891ed8ca8d03789fd31b
# < make -s -j 24 ARCH=arm64 O=/kisskb/build/stable-4.9_arm64-defconfig_arm64-gcc5.4 CROSS_COMPILE=/opt/cross/kisskb/br-aarch64-glibc-2016.08-613-ge98b4dd/bin/aarch64-linux-  defconfig
# < make -s -j 24 ARCH=arm64 O=/kisskb/build/stable-4.9_arm64-defconfig_arm64-gcc5.4 CROSS_COMPILE=/opt/cross/kisskb/br-aarch64-glibc-2016.08-613-ge98b4dd/bin/aarch64-linux-  help
# make -s -j 24 ARCH=arm64 O=/kisskb/build/stable-4.9_arm64-defconfig_arm64-gcc5.4 CROSS_COMPILE=/opt/cross/kisskb/br-aarch64-glibc-2016.08-613-ge98b4dd/bin/aarch64-linux-  olddefconfig
# make -s -j 24 ARCH=arm64 O=/kisskb/build/stable-4.9_arm64-defconfig_arm64-gcc5.4 CROSS_COMPILE=/opt/cross/kisskb/br-aarch64-glibc-2016.08-613-ge98b4dd/bin/aarch64-linux-  
arch/arm64/Makefile:27: ld does not support --fix-cortex-a53-843419; kernel may be susceptible to erratum
Completed OK
# rm -rf /kisskb/build/stable-4.9_arm64-defconfig_arm64-gcc5.4
# Build took: 0:04:44.531438