# git rev-parse -q --verify b4f633221f0aeac102e463a4be46a643b2e3b819^{commit}
b4f633221f0aeac102e463a4be46a643b2e3b819
already have revision, skipping fetch
# git checkout -q -f -B kisskb b4f633221f0aeac102e463a4be46a643b2e3b819
# git clean -qxdf
# < git log -1
# commit b4f633221f0aeac102e463a4be46a643b2e3b819
# Merge: 25b1fa8dfb3f 61e713bdca36
# Author: Linus Torvalds <torvalds@linux-foundation.org>
# Date:   Thu Apr 23 13:30:18 2020 -0700
# 
#     Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace
#     
#     Pull SIGCHLD fix from Eric Biederman:
#      "Christof Meerwald reported that do_notify_parent has not been
#       successfully populating si_pid and si_uid for multi-threaded
#       processes.
#     
#       This is the one-liner fix. Strictly speaking a one-liner plus
#       comment"
#     
#     * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace:
#       signal: Avoid corrupting si_pid and si_uid in do_notify_parent
# < /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 b4f633221f0aeac102e463a4be46a643b2e3b819
# < make -s -j 8 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 8 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-  help
# make -s -j 8 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-  olddefconfig
# make -s -j 8 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: 0:00:40.903023