# git rev-parse -q --verify 75013c6c52d80b2255ba273eedac013d58754b02^{commit}
# git fetch -q -n -f git://fs.ozlabs.ibm.com/kernel/linus master
warning: The last gc run reported the following. Please correct the root cause
and remove .git/gc.log.
Automatic cleanup will not be performed until the file is removed.

warning: There are too many unreachable loose objects; run 'git prune' to remove them.

# git rev-parse -q --verify 75013c6c52d80b2255ba273eedac013d58754b02^{commit}
75013c6c52d80b2255ba273eedac013d58754b02
# git checkout -q -f -B kisskb 75013c6c52d80b2255ba273eedac013d58754b02
# git clean -qxdf
# < git log -1
# commit 75013c6c52d80b2255ba273eedac013d58754b02
# Merge: 836d7f0572ca c8e2fe13d1d1
# Author: Linus Torvalds <torvalds@linux-foundation.org>
# Date:   Sun Mar 14 12:57:17 2021 -0700
# 
#     Merge tag 'perf_urgent_for_v5.12-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
#     
#     Pull perf fixes from Borislav Petkov:
#     
#      - Make sure PMU internal buffers are flushed for per-CPU events too and
#        properly handle PID/TID for large PEBS.
#     
#      - Handle the case properly when there's no PMU and therefore return an
#        empty list of perf MSRs for VMX to switch instead of reading random
#        garbage from the stack.
#     
#     * tag 'perf_urgent_for_v5.12-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
#       x86/perf: Use RET0 as default for guest_get_msrs to handle "no PMU" case
#       perf/x86/intel: Set PERF_ATTACH_SCHED_CB for large PEBS and LBR
#       perf/core: Flush PMU internal buffers for per-CPU events
# < /opt/cross/kisskb/korg/gcc-4.9.4-nolibc/arm-linux-gnueabi/bin/arm-linux-gnueabi-gcc --version
# < /opt/cross/kisskb/korg/gcc-4.9.4-nolibc/arm-linux-gnueabi/bin/arm-linux-gnueabi-ld --version
# < git log --format=%s --max-count=1 75013c6c52d80b2255ba273eedac013d58754b02
# < make -s -j 120 ARCH=arm O=/kisskb/build/linus_lpd270_defconfig_arm-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/arm-linux-gnueabi/bin/arm-linux-gnueabi-  lpd270_defconfig
# < make -s -j 120 ARCH=arm O=/kisskb/build/linus_lpd270_defconfig_arm-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/arm-linux-gnueabi/bin/arm-linux-gnueabi-  help
# make -s -j 120 ARCH=arm O=/kisskb/build/linus_lpd270_defconfig_arm-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/arm-linux-gnueabi/bin/arm-linux-gnueabi-  olddefconfig
# make -s -j 120 ARCH=arm O=/kisskb/build/linus_lpd270_defconfig_arm-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/arm-linux-gnueabi/bin/arm-linux-gnueabi-  
Completed OK
# rm -rf /kisskb/build/linus_lpd270_defconfig_arm-gcc4.9
# Build took: 0:00:42.017199