# git rev-parse -q --verify 7939f8beecf1cfb10d255be65bfbd3793fae82a1^{commit}
7939f8beecf1cfb10d255be65bfbd3793fae82a1
already have revision, skipping fetch
# git checkout -q -f -B kisskb 7939f8beecf1cfb10d255be65bfbd3793fae82a1
# git clean -qxdf
# < git log -1
# commit 7939f8beecf1cfb10d255be65bfbd3793fae82a1
# Merge: e8746440bf68 8b05a3a7503c
# Author: Linus Torvalds <torvalds@linux-foundation.org>
# Date:   Wed Jan 16 05:28:26 2019 +1200
# 
#     Merge tag 'trace-v5.0-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace
#     
#     Pull tracing fix from Steven Rostedt:
#      "Andrea Righi fixed a NULL pointer dereference in trace_kprobe_create()
#     
#       It is possible to trigger a NULL pointer dereference by writing an
#       incorrectly formatted string to the krpobe_events file"
#     
#     * tag 'trace-v5.0-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace:
#       tracing/kprobes: Fix NULL pointer dereference in trace_kprobe_create()
# < /opt/cross/kisskb/br-aarch64-glibc-2016.08-613-ge98b4dd/bin/aarch64-linux-gcc --version
# < /opt/cross/kisskb/br-aarch64-glibc-2016.08-613-ge98b4dd/bin/aarch64-linux-ld --version
# < git log --format=%s --max-count=1 7939f8beecf1cfb10d255be65bfbd3793fae82a1
# < make -s -j 48 ARCH=arm64 O=/kisskb/build/linus_arm64-allnoconfig_arm64-gcc5.4 CROSS_COMPILE=/opt/cross/kisskb/br-aarch64-glibc-2016.08-613-ge98b4dd/bin/aarch64-linux-  allnoconfig
# make -s -j 48 ARCH=arm64 O=/kisskb/build/linus_arm64-allnoconfig_arm64-gcc5.4 CROSS_COMPILE=/opt/cross/kisskb/br-aarch64-glibc-2016.08-613-ge98b4dd/bin/aarch64-linux-  
Completed OK
# rm -rf /kisskb/build/linus_arm64-allnoconfig_arm64-gcc5.4
# Build took: 0:00:15.322303