# git rev-parse -q --verify 99ddf2254febae9eab7fb0bcc02c5322243f5c49^{commit}
99ddf2254febae9eab7fb0bcc02c5322243f5c49
already have revision, skipping fetch
# git checkout -q -f -B kisskb 99ddf2254febae9eab7fb0bcc02c5322243f5c49
# git clean -qxdf
# < git log -1
# commit 99ddf2254febae9eab7fb0bcc02c5322243f5c49
# Merge: 76f598ba7d8e 3357c6e42964
# Author: Linus Torvalds <torvalds@linux-foundation.org>
# Date:   Wed Apr 5 09:11:08 2023 -0700
# 
#     Merge tag 'trace-v6.3-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace
#     
#     Pull tracing fixes from Steven Rostedt:
#     
#      - Fix timerlat notification, as it was not triggering the notify to
#        users when a new max latency was hit.
#     
#      - Do not trigger max latency if the tracing is off.
#     
#        When tracing is off, the ring buffer is not updated, it does not make
#        sense to notify when there's a new max latency detected by the
#        tracer, as why that latency happened is not available. The tracing
#        logic still runs when the ring buffer is disabled, but it should not
#        be triggering notifications.
#     
#      - Fix race on freeing the synthetic event "last_cmd" variable by adding
#        a mutex around it.
#     
#      - Fix race between reader and writer of the ring buffer by adding
#        memory barriers. When the writer is still on the reader page it must
#        have its content visible on the buffer before it moves the commit
#        index that the reader uses to know how much content is on the page.
#     
#      - Make get_lock_parent_ip() always inlined, as it uses _THIS_IP_ and
#        _RET_IP_, which gets broken if it is not inlined.
#     
#      - Make __field(int, arr[5]) in a TRACE_EVENT() macro fail to build.
#     
#        The field formats of trace events are calculated by using
#        sizeof(type) and other means by what is passed into the structure
#        macros like __field(). The __field() macro is only meant for atom
#        types like int, long, short, pointer, etc. It is not meant for
#        arrays.
#     
#        The code will currently compile with arrays, but then the format
#        produced will be inaccurate, and user space parsing tools will break.
#     
#        Two bugs have already been fixed, now add code that will make the
#        kernel fail to build if another trace event includes this buggy field
#        format.
#     
#      - Fix boot up snapshot code:
#     
#        Boot snapshots were triggering when not even asked for on the kernel
#        command line. This was caused by two bugs:
#     
#         1) It would trigger a snapshot on any instance if one was created
#            from the kernel command line.
#     
#         2) The error handling would only affect the top level instance.
#            So the fact that a snapshot was done on a instance that didn't
#            allocate a buffer triggered a warning written into the top level
#            buffer, and worse yet, disabled the top level buffer.
#     
#      - Fix memory leak that was caused when an error was logged in a trace
#        buffer instance, and then the buffer instance was removed.
#     
#        The allocated error log messages still needed to be freed.
#     
#     * tag 'trace-v6.3-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace:
#       tracing: Free error logs of tracing instances
#       tracing: Fix ftrace_boot_snapshot command line logic
#       tracing: Have tracing_snapshot_instance_cond() write errors to the appropriate instance
#       tracing: Error if a trace event has an array for a __field()
#       tracing/osnoise: Fix notify new tracing_max_latency
#       tracing/timerlat: Notify new max thread latency
#       ftrace: Mark get_lock_parent_ip() __always_inline
#       ring-buffer: Fix race while reader and writer are on the same page
#       tracing/synthetic: Fix races on freeing last_cmd
# < /opt/cross/kisskb/korg/gcc-8.5.0-nolibc/mips-linux/bin/mips-linux-gcc --version
# < /opt/cross/kisskb/korg/gcc-8.5.0-nolibc/mips-linux/bin/mips-linux-ld --version
# < git log --format=%s --max-count=1 99ddf2254febae9eab7fb0bcc02c5322243f5c49
# < make -s -j 160 ARCH=mips O=/kisskb/build/linus_64r6_defconfig_mips-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.5.0-nolibc/mips-linux/bin/mips-linux-  64r6_defconfig
./.config.64r6_defconfig:98:warning: override: CPU_BIG_ENDIAN changes choice state
.config:97:warning: override: CPU_BIG_ENDIAN changes choice state
# < make -s -j 160 ARCH=mips O=/kisskb/build/linus_64r6_defconfig_mips-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.5.0-nolibc/mips-linux/bin/mips-linux-  help
# make -s -j 160 ARCH=mips O=/kisskb/build/linus_64r6_defconfig_mips-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.5.0-nolibc/mips-linux/bin/mips-linux-  olddefconfig
# make -s -j 160 ARCH=mips O=/kisskb/build/linus_64r6_defconfig_mips-gcc8 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-8.5.0-nolibc/mips-linux/bin/mips-linux-  
Completed OK
# rm -rf /kisskb/build/linus_64r6_defconfig_mips-gcc8
# Build took: 0:01:13.910325