# git rev-parse -q --verify 0513e464f9007b70b96740271a948ca5ab6e7dd7^{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 0513e464f9007b70b96740271a948ca5ab6e7dd7^{commit}
0513e464f9007b70b96740271a948ca5ab6e7dd7
# git checkout -q -f -B kisskb 0513e464f9007b70b96740271a948ca5ab6e7dd7
# git clean -qxdf
# < git log -1
# commit 0513e464f9007b70b96740271a948ca5ab6e7dd7
# Merge: 9cccec2bf32f 4da8b121884d
# Author: Linus Torvalds <torvalds@linux-foundation.org>
# Date:   Mon Sep 27 14:06:42 2021 -0700
# 
#     Merge tag 'perf-tools-fixes-for-v5.15-2021-09-27' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux
#     
#     Pull more perf tools fixes from Arnaldo Carvalho de Melo:
#     
#      - Fix 'perf test' DWARF unwind for optimized builds.
#     
#      - Fix 'perf test' 'Object code reading' when dealing with samples in
#        @plt symbols.
#     
#      - Fix off-by-one directory paths in the ARM support code.
#     
#      - Fix error message to eliminate confusion in 'perf config' when first
#        creating a config file.
#     
#      - 'perf iostat' fix for system wide operation.
#     
#      - Fix printing of metrics when 'perf iostat' is used with one or more
#        iio_root_ports and unconnected cpus (using -C).
#     
#      - Fix several typos in the documentation files.
#     
#      - Fix spelling mistake "icach" -> "icache" in the power8 JSON vendor
#        files.
#     
#     * tag 'perf-tools-fixes-for-v5.15-2021-09-27' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux:
#       perf iostat: Fix Segmentation fault from NULL 'struct perf_counts_values *'
#       perf iostat: Use system-wide mode if the target cpu_list is unspecified
#       perf config: Refine error message to eliminate confusion
#       perf doc: Fix typos all over the place
#       perf arm: Fix off-by-one directory paths.
#       perf vendor events powerpc: Fix spelling mistake "icach" -> "icache"
#       perf tests: Fix flaky test 'Object code reading'
#       perf test: Fix DWARF unwind for optimized builds.
# < /opt/cross/kisskb/korg/gcc-11.1.0-nolibc/aarch64-linux/bin/aarch64-linux-gcc --version
# < /opt/cross/kisskb/korg/gcc-11.1.0-nolibc/aarch64-linux/bin/aarch64-linux-ld --version
# < git log --format=%s --max-count=1 0513e464f9007b70b96740271a948ca5ab6e7dd7
# < make -s -j 32 ARCH=arm64 O=/kisskb/build/linus-rand_arm64-randconfig_arm64-gcc11 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-11.1.0-nolibc/aarch64-linux/bin/aarch64-linux-  randconfig
# Added to kconfig CONFIG_PREVENT_FIRMWARE_BUILD=y
# < make -s -j 32 ARCH=arm64 O=/kisskb/build/linus-rand_arm64-randconfig_arm64-gcc11 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-11.1.0-nolibc/aarch64-linux/bin/aarch64-linux-  help
# make -s -j 32 ARCH=arm64 O=/kisskb/build/linus-rand_arm64-randconfig_arm64-gcc11 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-11.1.0-nolibc/aarch64-linux/bin/aarch64-linux-  olddefconfig
.config:6598:warning: override: reassigning to symbol PREVENT_FIRMWARE_BUILD
# make -s -j 32 ARCH=arm64 O=/kisskb/build/linus-rand_arm64-randconfig_arm64-gcc11 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-11.1.0-nolibc/aarch64-linux/bin/aarch64-linux-  
Completed OK
# rm -rf /kisskb/build/linus-rand_arm64-randconfig_arm64-gcc11
# Build took: 0:05:45.658466