# git rev-parse -q --verify e49d033bddf5b565044e2abe4241353959bc9120^{commit}
e49d033bddf5b565044e2abe4241353959bc9120
already have revision, skipping fetch
# git checkout -q -f -B kisskb e49d033bddf5b565044e2abe4241353959bc9120
# git clean -qxdf
# < git log -1
# commit e49d033bddf5b565044e2abe4241353959bc9120
# Author: Linus Torvalds <torvalds@linux-foundation.org>
# Date:   Sun Apr 4 14:15:36 2021 -0700
# 
#     Linux 5.12-rc6
# < /opt/cross/kisskb/korg/gcc-4.9.4-nolibc/arm-linux-gnueabi/bin/arm-linux-gnueabi-gcc --version
# < /opt/cross/kisskb/korg/gcc-4.9.4-nolibc/arm-linux-gnueabi/bin/arm-linux-gnueabi-ld --version
# < git log --format=%s --max-count=1 e49d033bddf5b565044e2abe4241353959bc9120
# < make -s -j 80 ARCH=arm O=/kisskb/build/linus_efm32_defconfig_arm-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/arm-linux-gnueabi/bin/arm-linux-gnueabi-  efm32_defconfig
***
*** Can't find default configuration "arch/arm/configs/efm32_defconfig"!
***
make[2]: *** [/kisskb/src/scripts/kconfig/Makefile:80: efm32_defconfig] Error 1
make[1]: *** [/kisskb/src/Makefile:602: efm32_defconfig] Error 2
make: *** [Makefile:215: __sub-make] Error 2
Command 'make -s -j 80 ARCH=arm O=/kisskb/build/linus_efm32_defconfig_arm-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/arm-linux-gnueabi/bin/arm-linux-gnueabi-  efm32_defconfig' returned non-zero exit status 2
# rm -rf /kisskb/build/linus_efm32_defconfig_arm-gcc4.9
# Build took: 0:00:03.169847