# git rev-parse -q --verify 1bc191051dca28fa6d20fd1dc34a1903e7d4fb62^{commit}
1bc191051dca28fa6d20fd1dc34a1903e7d4fb62
already have revision, skipping fetch
# git checkout -q -f -B kisskb 1bc191051dca28fa6d20fd1dc34a1903e7d4fb62
# git clean -qxdf
# < git log -1
# commit 1bc191051dca28fa6d20fd1dc34a1903e7d4fb62
# Merge: 20f463fb3868 795301d3c289
# Author: Linus Torvalds <torvalds@linux-foundation.org>
# Date:   Wed Mar 23 11:40:25 2022 -0700
# 
#     Merge tag 'trace-v5.18' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace
#     
#     Pull tracing updates from Steven Rostedt:
#     
#      - New user_events interface. User space can register an event with the
#        kernel describing the format of the event. Then it will receive a
#        byte in a page mapping that it can check against. A privileged task
#        can then enable that event like any other event, which will change
#        the mapped byte to true, telling the user space application to start
#        writing the event to the tracing buffer.
#     
#      - Add new "ftrace_boot_snapshot" kernel command line parameter. When
#        set, the tracing buffer will be saved in the snapshot buffer at boot
#        up when the kernel hands things over to user space. This will keep
#        the traces that happened at boot up available even if user space boot
#        up has tracing as well.
#     
#      - Have TRACE_EVENT_ENUM() also update trace event field type
#        descriptions. Thus if a static array defines its size with an enum,
#        the user space trace event parsers can still know how to parse that
#        array.
#     
#      - Add new TRACE_CUSTOM_EVENT() macro. This acts the same as the
#        TRACE_EVENT() macro, but will attach to an existing tracepoint. This
#        will make one tracepoint be able to trace different content and not
#        be stuck at only what the original TRACE_EVENT() macro exports.
#     
#      - Fixes to tracing error logging.
#     
#      - Better saving of cmdlines to PIDs when tracing (use the wakeup events
#        for mapping).
#     
#     * tag 'trace-v5.18' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace: (30 commits)
#       tracing: Have type enum modifications copy the strings
#       user_events: Add trace event call as root for low permission cases
#       tracing/user_events: Use alloc_pages instead of kzalloc() for register pages
#       tracing: Add snapshot at end of kernel boot up
#       tracing: Have TRACE_DEFINE_ENUM affect trace event types as well
#       tracing: Fix strncpy warning in trace_events_synth.c
#       user_events: Prevent dyn_event delete racing with ioctl add/delete
#       tracing: Add TRACE_CUSTOM_EVENT() macro
#       tracing: Move the defines to create TRACE_EVENTS into their own files
#       tracing: Add sample code for custom trace events
#       tracing: Allow custom events to be added to the tracefs directory
#       tracing: Fix last_cmd_set() string management in histogram code
#       user_events: Fix potential uninitialized pointer while parsing field
#       tracing: Fix allocation of last_cmd in last_cmd_set()
#       user_events: Add documentation file
#       user_events: Add sample code for typical usage
#       user_events: Add self-test for validator boundaries
#       user_events: Add self-test for perf_event integration
#       user_events: Add self-test for dynamic_events integration
#       user_events: Add self-test for ftrace integration
#       ...
# < /opt/cross/kisskb/korg/gcc-11.1.0-nolibc/s390-linux/bin/s390-linux-gcc --version
# < /opt/cross/kisskb/korg/gcc-11.1.0-nolibc/s390-linux/bin/s390-linux-ld --version
# < git log --format=%s --max-count=1 1bc191051dca28fa6d20fd1dc34a1903e7d4fb62
# < make -s -j 10 ARCH=s390 O=/kisskb/build/linus_s390-defconfig_s390x-gcc11 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-11.1.0-nolibc/s390-linux/bin/s390-linux-  defconfig
# Added to kconfig CONFIG_DEBUG_INFO_BTF=n
# Added to kconfig 
# < make -s -j 10 ARCH=s390 O=/kisskb/build/linus_s390-defconfig_s390x-gcc11 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-11.1.0-nolibc/s390-linux/bin/s390-linux-  help
# make -s -j 10 ARCH=s390 O=/kisskb/build/linus_s390-defconfig_s390x-gcc11 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-11.1.0-nolibc/s390-linux/bin/s390-linux-  olddefconfig
# make -s -j 10 ARCH=s390 O=/kisskb/build/linus_s390-defconfig_s390x-gcc11 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-11.1.0-nolibc/s390-linux/bin/s390-linux-  
Completed OK
# rm -rf /kisskb/build/linus_s390-defconfig_s390x-gcc11
# Build took: 0:07:00.192236