# git rev-parse -q --verify ac438771ccb4479528594c7e19f2c39cf1814a86^{commit}
# git fetch -q -n -f git://fs.ozlabs.ibm.com/kernel/linus master
# git rev-parse -q --verify ac438771ccb4479528594c7e19f2c39cf1814a86^{commit}
ac438771ccb4479528594c7e19f2c39cf1814a86
# git checkout -q -f -B kisskb ac438771ccb4479528594c7e19f2c39cf1814a86
# git clean -qxdf
# < git log -1
# commit ac438771ccb4479528594c7e19f2c39cf1814a86
# Merge: 8c1b724ddb21 bfacd38f8d5b
# Author: Linus Torvalds <torvalds@linux-foundation.org>
# Date:   Thu Apr 2 15:21:48 2020 -0700
# 
#     Merge branch 'for-5.7' of git://git.kernel.org/pub/scm/linux/kernel/git/dennis/percpu
#     
#     Pull percpu updates from Dennis Zhou:
#      "This is just a few documentation fixes for percpu refcount and bitmap
#       helpers that went in v5.6, and moving my emails to all be at korg"
#     
#     * 'for-5.7' of git://git.kernel.org/pub/scm/linux/kernel/git/dennis/percpu:
#       percpu: update copyright emails to dennis@kernel.org
#       include/bitmap.h: add new functions to documentation
#       include/bitmap.h: add missing parameter in docs
#       percpu_ref: Fix comment regarding percpu_ref_init flags
# < /opt/cross/kisskb/fe-x86-64-core-i7-2017.05/bin/x86_64-linux-gcc --version
# < /opt/cross/kisskb/fe-x86-64-core-i7-2017.05/bin/x86_64-linux-ld --version
# < git log --format=%s --max-count=1 ac438771ccb4479528594c7e19f2c39cf1814a86
# < make -s -j 24 ARCH=x86_64 O=/kisskb/build/linus-rand_x86_64-randconfig_um-x86_64 CROSS_COMPILE=/opt/cross/kisskb/fe-x86-64-core-i7-2017.05/bin/x86_64-linux-  randconfig
KCONFIG_SEED=0x26353978
# Added to kconfig CONFIG_STANDALONE=y
# Added to kconfig CONFIG_PREVENT_FIRMWARE_BUILD=y
# Added to kconfig CONFIG_CC_STACKPROTECTOR_STRONG=n
# Added to kconfig CONFIG_GCC_PLUGINS=n
# Added to kconfig CONFIG_GCC_PLUGIN_CYC_COMPLEXITY=n
# Added to kconfig CONFIG_GCC_PLUGIN_SANCOV=n
# Added to kconfig CONFIG_GCC_PLUGIN_LATENT_ENTROPY=n
# < make -s -j 24 ARCH=x86_64 O=/kisskb/build/linus-rand_x86_64-randconfig_um-x86_64 CROSS_COMPILE=/opt/cross/kisskb/fe-x86-64-core-i7-2017.05/bin/x86_64-linux-  help
# make -s -j 24 ARCH=x86_64 O=/kisskb/build/linus-rand_x86_64-randconfig_um-x86_64 CROSS_COMPILE=/opt/cross/kisskb/fe-x86-64-core-i7-2017.05/bin/x86_64-linux-  olddefconfig
.config:5548:warning: override: reassigning to symbol PREVENT_FIRMWARE_BUILD
# make -s -j 24 ARCH=x86_64 O=/kisskb/build/linus-rand_x86_64-randconfig_um-x86_64 CROSS_COMPILE=/opt/cross/kisskb/fe-x86-64-core-i7-2017.05/bin/x86_64-linux-  
You are building kernel with non-retpoline compiler.
Please update your compiler.
make[1]: *** [arch/x86/Makefile:310: checkbin] Error 1
make[1]: *** Waiting for unfinished jobs....
make: *** [Makefile:180: sub-make] Error 2
Command 'make -s -j 24 ARCH=x86_64 O=/kisskb/build/linus-rand_x86_64-randconfig_um-x86_64 CROSS_COMPILE=/opt/cross/kisskb/fe-x86-64-core-i7-2017.05/bin/x86_64-linux-  ' returned non-zero exit status 2
# rm -rf /kisskb/build/linus-rand_x86_64-randconfig_um-x86_64
# Build took: 0:00:24.485072