# git rev-parse -q --verify 48342fc07272eec454fc5b400ed3ce3739c7e950^{commit}
48342fc07272eec454fc5b400ed3ce3739c7e950
already have revision, skipping fetch
# git checkout -q -f -B kisskb 48342fc07272eec454fc5b400ed3ce3739c7e950
# git clean -qxdf
# < git log -1
# commit 48342fc07272eec454fc5b400ed3ce3739c7e950
# Merge: 6a447b0e3151 2e7f545096f9
# Author: Linus Torvalds <torvalds@linux-foundation.org>
# Date:   Sun Dec 20 11:21:06 2020 -0800
# 
#     Merge tag 'perf-tools-2020-12-19' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux
#     
#     Pull perf tools updates from Arnaldo Carvalho de Melo:
#      "perf record:
#        - Fix memory leak when using '--user-regs=?' to list registers
#     
#       aarch64 support:
#        - Add aarch64 registers to 'perf record's' --user-regs command line
#          option
#     
#       aarch64 hw tracing support:
#        - Decode memory tagging properties
#        - Improve ARM's auxtrace support
#        - Add support for ARMv8.3-SPE
#     
#       perf kvm:
#        - Add kvm-stat for arm64
#     
#       perf stat:
#        - Add --quiet option
#     
#       Cleanups:
#        - Fixup function names wrt what is in libperf and what is in
#          tools/perf
#     
#       Build:
#        - Allow building without libbpf in older systems
#     
#       New kernel features:
#        - Initial support for data/code page size sample type, more to come
#     
#       perf annotate:
#        - Support MIPS instruction extended support
#     
#       perf stack unwinding:
#        - Fix separate debug info files when using elfutils' libdw's unwinder
#     
#       perf vendor events:
#        - Update Intel's Skylake client events to v50
#        - Add JSON metrics for ARM's imx8mm DDR Perf
#        - Support printing metric groups for system PMUs
#     
#       perf build id:
#        - Prep work for supporting having the build id provided by the kernel
#          in PERF_RECORD_MMAP2 metadata events
#     
#       perf stat:
#        - Support regex pattern in --for-each-cgroup
#     
#       pipe mode:
#        - Allow to use stdio functions for pipe mode
#        - Support 'perf report's' --header-only for pipe mode
#        - Support pipe mode display in 'perf evlist'
#     
#       Documentation:
#        - Update information about CAP_PERFMON"
#     
#     * tag 'perf-tools-2020-12-19' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux: (134 commits)
#       perf mem: Factor out a function to generate sort order
#       perf sort: Add sort option for data page size
#       perf script: Support data page size
#       tools headers UAPI: Update asm-generic/unistd.h
#       tools headers cpufeatures: Sync with the kernel sources
#       tools headers UAPI: Sync linux/prctl.h with the kernel sources
#       tools headers UAPI: Sync linux/fscrypt.h with the kernel sources
#       tools headers UAPI: Sync linux/const.h with the kernel headers
#       tools arch x86: Sync the msr-index.h copy with the kernel sources
#       perf trace beauty: Update copy of linux/socket.h with the kernel sources
#       tools headers: Update linux/ctype.h with the kernel sources
#       tools headers: Add conditional __has_builtin()
#       tools headers: Get tools's linux/compiler.h closer to the kernel's
#       tools headers UAPI: Sync linux/stat.h with the kernel sources
#       tools headers: Syncronize linux/build_bug.h with the kernel sources
#       perf tools: Reformat record's control fd man text
#       perf config: Fix example command in manpage to conform to syntax specified in the SYNOPSIS section.
#       perf test: Make sample-parsing test aware of PERF_SAMPLE_{CODE,DATA}_PAGE_SIZE
#       perf tools: Add support to read build id from compressed elf
#       perf debug: Add debug_set_file function
#       ...
# < /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 48342fc07272eec454fc5b400ed3ce3739c7e950
# < make -s -j 32 ARCH=arm O=/kisskb/build/linus_viper_defconfig_arm-gcc4.9 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-4.9.4-nolibc/arm-linux-gnueabi/bin/arm-linux-gnueabi-  viper_defconfig
# < make -s -j 32 ARCH=arm O=/kisskb/build/linus_viper_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 32 ARCH=arm O=/kisskb/build/linus_viper_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 32 ARCH=arm O=/kisskb/build/linus_viper_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_viper_defconfig_arm-gcc4.9
# Build took: 0:01:02.245660