# git rev-parse -q --verify e310396bb8d7db977a0e10ef7b5040e98b89c34c^{commit}
e310396bb8d7db977a0e10ef7b5040e98b89c34c
already have revision, skipping fetch
# git checkout -q -f -B kisskb e310396bb8d7db977a0e10ef7b5040e98b89c34c
# git clean -qxdf
# < git log -1
# commit e310396bb8d7db977a0e10ef7b5040e98b89c34c
# Merge: c1ef57a3a3f5 a00574036c26
# Author: Linus Torvalds <torvalds@linux-foundation.org>
# Date:   Thu Feb 6 07:12:11 2020 +0000
# 
#     Merge tag 'trace-v5.6-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace
#     
#     Pull tracing updates from Steven Rostedt:
#     
#      - Added new "bootconfig".
#     
#        This looks for a file appended to initrd to add boot config options,
#        and has been discussed thoroughly at Linux Plumbers.
#     
#        Very useful for adding kprobes at bootup.
#     
#        Only enabled if "bootconfig" is on the real kernel command line.
#     
#      - Created dynamic event creation.
#     
#        Merges common code between creating synthetic events and kprobe
#        events.
#     
#      - Rename perf "ring_buffer" structure to "perf_buffer"
#     
#      - Rename ftrace "ring_buffer" structure to "trace_buffer"
#     
#        Had to rename existing "trace_buffer" to "array_buffer"
#     
#      - Allow trace_printk() to work withing (some) tracing code.
#     
#      - Sort of tracing configs to be a little better organized
#     
#      - Fixed bug where ftrace_graph hash was not being protected properly
#     
#      - Various other small fixes and clean ups
#     
#     * tag 'trace-v5.6-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace: (88 commits)
#       bootconfig: Show the number of nodes on boot message
#       tools/bootconfig: Show the number of bootconfig nodes
#       bootconfig: Add more parse error messages
#       bootconfig: Use bootconfig instead of boot config
#       ftrace: Protect ftrace_graph_hash with ftrace_sync
#       ftrace: Add comment to why rcu_dereference_sched() is open coded
#       tracing: Annotate ftrace_graph_notrace_hash pointer with __rcu
#       tracing: Annotate ftrace_graph_hash pointer with __rcu
#       bootconfig: Only load bootconfig if "bootconfig" is on the kernel cmdline
#       tracing: Use seq_buf for building dynevent_cmd string
#       tracing: Remove useless code in dynevent_arg_pair_add()
#       tracing: Remove check_arg() callbacks from dynevent args
#       tracing: Consolidate some synth_event_trace code
#       tracing: Fix now invalid var_ref_vals assumption in trace action
#       tracing: Change trace_boot to use synth_event interface
#       tracing: Move tracing selftests to bottom of menu
#       tracing: Move mmio tracer config up with the other tracers
#       tracing: Move tracing test module configs together
#       tracing: Move all function tracing configs together
#       tracing: Documentation for in-kernel synthetic event API
#       ...
# < /opt/cross/kisskb/korg/gcc-8.1.0-nolibc/aarch64-linux/bin/aarch64-linux-gcc --version
# < /opt/cross/kisskb/korg/gcc-8.1.0-nolibc/aarch64-linux/bin/aarch64-linux-ld --version
# < git log --format=%s --max-count=1 e310396bb8d7db977a0e10ef7b5040e98b89c34c
# < make -s -j 48 ARCH=arm64 O=/kisskb/build/linus_arm64-defconfig_arm64-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/aarch64-linux/bin/aarch64-linux-  defconfig
# make -s -j 48 ARCH=arm64 O=/kisskb/build/linus_arm64-defconfig_arm64-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.1.0-nolibc/aarch64-linux/bin/aarch64-linux-  
Completed OK
# rm -rf /kisskb/build/linus_arm64-defconfig_arm64-gcc8
# Build took: 0:05:28.344926