# git rev-parse -q --verify 872d92dec353a8d30fa186892cd5ea3e17ca75d3^{commit}
# git fetch -q -n -f git://fs.ozlabs.ibm.com/kernel/crypto master
# git rev-parse -q --verify 872d92dec353a8d30fa186892cd5ea3e17ca75d3^{commit}
872d92dec353a8d30fa186892cd5ea3e17ca75d3
# git checkout -q -f -B kisskb 872d92dec353a8d30fa186892cd5ea3e17ca75d3
# git clean -qxdf
# < git log -1
# commit 872d92dec353a8d30fa186892cd5ea3e17ca75d3
# Author: Hongbo Yao <yaohongbo@huawei.com>
# Date:   Wed Jan 22 17:12:38 2020 +0800
# 
#     tee: amdtee: amdtee depends on CRYPTO_DEV_CCP_DD
#     
#     If CRYPTO_DEV_CCP_DD=m and AMDTEE=y, the following error is seen
#     while building call.c or core.c
#     
#     drivers/tee/amdtee/call.o: In function `handle_unload_ta':
#     call.c:(.text+0x35f): undefined reference to `psp_tee_process_cmd'
#     drivers/tee/amdtee/core.o: In function `amdtee_driver_init':
#     core.c:(.init.text+0xf): undefined reference to `psp_check_tee_status
#     
#     Fix the config dependency for AMDTEE here.
#     
#     Reported-by: Hulk Robot <hulkci@huawei.com>
#     Fixes: 757cc3e9ff1d ("tee: add AMD-TEE driver")
#     Signed-off-by: Hongbo Yao <yaohongbo@huawei.com>
#     Reviewed-by: Rijo Thomas <Rijo-john.Thomas@amd.com>
#     Acked-by: Jens Wiklander <jens.wiklander@linaro.org>
#     Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
# < /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 872d92dec353a8d30fa186892cd5ea3e17ca75d3
# < make -s -j 80 ARCH=powerpc O=/kisskb/build/crypto_powernv_defconfig+NO_PERF_ppc64le-gcc5 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-5.5.0-nolibc/powerpc64-linux/bin/powerpc64-linux-  powernv_defconfig
# Added to kconfig CONFIG_PERF_EVENTS=n
# yes \n | make -s -j 80 ARCH=powerpc O=/kisskb/build/crypto_powernv_defconfig+NO_PERF_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 80 ARCH=powerpc O=/kisskb/build/crypto_powernv_defconfig+NO_PERF_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/crypto_powernv_defconfig+NO_PERF_ppc64le-gcc5
# Build took: 0:03:01.589136