# git rev-parse -q --verify ff1ffd71d5f0612cf194f5705c671d6b64bf5f91^{commit}
ff1ffd71d5f0612cf194f5705c671d6b64bf5f91
already have revision, skipping fetch
# git checkout -q -f -B kisskb ff1ffd71d5f0612cf194f5705c671d6b64bf5f91
# git clean -qxdf
# < git log -1
# commit ff1ffd71d5f0612cf194f5705c671d6b64bf5f91
# Merge: 453fa43cdb8e dfb5c1e12c28
# Author: Linus Torvalds <torvalds@linux-foundation.org>
# Date:   Wed Sep 15 17:18:56 2021 -0700
# 
#     Merge tag 'hyperv-fixes-signed-20210915' of git://git.kernel.org/pub/scm/linux/kernel/git/hyperv/linux
#     
#     Pull hyperv fixes from Wei Liu:
#     
#      - Fix kernel crash caused by uio driver (Vitaly Kuznetsov)
#     
#      - Remove on-stack cpumask from HV APIC code (Wei Liu)
#     
#     * tag 'hyperv-fixes-signed-20210915' of git://git.kernel.org/pub/scm/linux/kernel/git/hyperv/linux:
#       x86/hyperv: remove on-stack cpumask from hv_send_ipi_mask_allbutself
#       asm-generic/hyperv: provide cpumask_to_vpset_noself
#       Drivers: hv: vmbus: Fix kernel crash upon unbinding a device from uio_hv_generic driver
# < /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 ff1ffd71d5f0612cf194f5705c671d6b64bf5f91
# < make -s -j 10 ARCH=um O=/kisskb/build/linus_um-defconfig_um-x86_64 CROSS_COMPILE=/opt/cross/kisskb/fe-x86-64-core-i7-2017.05/bin/x86_64-linux- SUBARCH=x86_64 defconfig
# < make -s -j 10 ARCH=um O=/kisskb/build/linus_um-defconfig_um-x86_64 CROSS_COMPILE=/opt/cross/kisskb/fe-x86-64-core-i7-2017.05/bin/x86_64-linux- SUBARCH=x86_64 help
# make -s -j 10 ARCH=um O=/kisskb/build/linus_um-defconfig_um-x86_64 CROSS_COMPILE=/opt/cross/kisskb/fe-x86-64-core-i7-2017.05/bin/x86_64-linux- SUBARCH=x86_64 olddefconfig
# make -s -j 10 ARCH=um O=/kisskb/build/linus_um-defconfig_um-x86_64 CROSS_COMPILE=/opt/cross/kisskb/fe-x86-64-core-i7-2017.05/bin/x86_64-linux- SUBARCH=x86_64 
/kisskb/src/arch/x86/um/Makefile:44: FORCE prerequisite is missing
  LINK linux
Completed OK
# rm -rf /kisskb/build/linus_um-defconfig_um-x86_64
# Build took: 0:01:47.084988