# git rev-parse -q --verify a087241716a6cea8518ca33839276a9648d91cef^{commit}
a087241716a6cea8518ca33839276a9648d91cef
already have revision, skipping fetch
# git checkout -q -f -B kisskb a087241716a6cea8518ca33839276a9648d91cef
# git clean -qxdf
# < git log -1
# commit a087241716a6cea8518ca33839276a9648d91cef
# Merge: 5ba836eb9fdb dfdc6e73cdcf
# Author: Linus Torvalds <torvalds@linux-foundation.org>
# Date:   Fri Dec 18 11:08:06 2020 -0800
# 
#     Merge tag 's390-5.11-2' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux
#     
#     Pull more s390 updates from Heiko Carstens:
#      "This is mainly to decouple udelay() and arch_cpu_idle() and simplify
#       both of them.
#     
#       Summary:
#     
#        - Always initialize kernel stack backchain when entering the kernel,
#          so that unwinding works properly.
#     
#        - Fix stack unwinder test case to avoid rare interrupt stack
#          corruption.
#     
#        - Simplify udelay() and just let it busy loop instead of implementing
#          a complex logic.
#     
#        - arch_cpu_idle() cleanup.
#     
#        - Some other minor improvements"
#     
#     * tag 's390-5.11-2' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux:
#       s390/zcrypt: convert comma to semicolon
#       s390/idle: allow arch_cpu_idle() to be kprobed
#       s390/idle: remove raw_local_irq_save()/restore() from arch_cpu_idle()
#       s390/idle: merge enabled_wait() and arch_cpu_idle()
#       s390/delay: remove udelay_simple()
#       s390/irq: select HAVE_IRQ_EXIT_ON_IRQ_STACK
#       s390/delay: simplify udelay
#       s390/test_unwind: use timer instead of udelay
#       s390/test_unwind: fix CALL_ON_STACK tests
#       s390: make calls to TRACE_IRQS_OFF/TRACE_IRQS_ON balanced
#       s390: always clear kernel stack backchain before calling functions
# < /opt/cross/kisskb/korg/gcc-8.1.0-nolibc/aarch64-linux/bin/aarch64-linux-gcc --version
# < /opt/cross/kisskb/korg/gcc-8.1.0-nolibc/aarch64-linux/bin/aarch64-linux-ld --version
# < git log --format=%s --max-count=1 a087241716a6cea8518ca33839276a9648d91cef
# < make -s -j 48 ARCH=arm64 O=/kisskb/build/linus_arm64-allnoconfig_arm64-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/aarch64-linux/bin/aarch64-linux-  allnoconfig
# < make -s -j 48 ARCH=arm64 O=/kisskb/build/linus_arm64-allnoconfig_arm64-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/aarch64-linux/bin/aarch64-linux-  help
# make -s -j 48 ARCH=arm64 O=/kisskb/build/linus_arm64-allnoconfig_arm64-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/aarch64-linux/bin/aarch64-linux-  olddefconfig
# make -s -j 48 ARCH=arm64 O=/kisskb/build/linus_arm64-allnoconfig_arm64-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/aarch64-linux/bin/aarch64-linux-  
Completed OK
# rm -rf /kisskb/build/linus_arm64-allnoconfig_arm64-gcc8
# Build took: 0:00:23.777530