# git rev-parse -q --verify 79ef0c00142519bc34e1341447f3797436cc48bf^{commit}
# git fetch -q -n -f git://fs.ozlabs.ibm.com/kernel/linus master
# git rev-parse -q --verify 79ef0c00142519bc34e1341447f3797436cc48bf^{commit}
79ef0c00142519bc34e1341447f3797436cc48bf
# git checkout -q -f -B kisskb 79ef0c00142519bc34e1341447f3797436cc48bf
# git clean -qxdf
# < git log -1
# commit 79ef0c00142519bc34e1341447f3797436cc48bf
# Merge: d54f486035fd feea69ec121f
# Author: Linus Torvalds <torvalds@linux-foundation.org>
# Date:   Mon Nov 1 20:05:19 2021 -0700
# 
#     Merge tag 'trace-v5.16' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace
#     
#     Pull tracing updates from Steven Rostedt:
#     
#      - kprobes: Restructured stack unwinder to show properly on x86 when a
#        stack dump happens from a kretprobe callback.
#     
#      - Fix to bootconfig parsing
#     
#      - Have tracefs allow owner and group permissions by default (only
#        denying others). There's been pressure to allow non root to tracefs
#        in a controlled fashion, and using groups is probably the safest.
#     
#      - Bootconfig memory managament updates.
#     
#      - Bootconfig clean up to have the tools directory be less dependent on
#        changes in the kernel tree.
#     
#      - Allow perf to be traced by function tracer.
#     
#      - Rewrite of function graph tracer to be a callback from the function
#        tracer instead of having its own trampoline (this change will happen
#        on an arch by arch basis, and currently only x86_64 implements it).
#     
#      - Allow multiple direct trampolines (bpf hooks to functions) be batched
#        together in one synchronization.
#     
#      - Allow histogram triggers to add variables that can perform
#        calculations against the event's fields.
#     
#      - Use the linker to determine architecture callbacks from the ftrace
#        trampoline to allow for proper parameter prototypes and prevent
#        warnings from the compiler.
#     
#      - Extend histogram triggers to key off of variables.
#     
#      - Have trace recursion use bit magic to determine preempt context over
#        if branches.
#     
#      - Have trace recursion disable preemption as all use cases do anyway.
#     
#      - Added testing for verification of tracing utilities.
#     
#      - Various small clean ups and fixes.
#     
#     * tag 'trace-v5.16' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace: (101 commits)
#       tracing/histogram: Fix semicolon.cocci warnings
#       tracing/histogram: Fix documentation inline emphasis warning
#       tracing: Increase PERF_MAX_TRACE_SIZE to handle Sentinel1 and docker together
#       tracing: Show size of requested perf buffer
#       bootconfig: Initialize ret in xbc_parse_tree()
#       ftrace: do CPU checking after preemption disabled
#       ftrace: disable preemption when recursion locked
#       tracing/histogram: Document expression arithmetic and constants
#       tracing/histogram: Optimize division by a power of 2
#       tracing/histogram: Covert expr to const if both operands are constants
#       tracing/histogram: Simplify handling of .sym-offset in expressions
#       tracing: Fix operator precedence for hist triggers expression
#       tracing: Add division and multiplication support for hist triggers
#       tracing: Add support for creating hist trigger variables from literal
#       selftests/ftrace: Stop tracing while reading the trace file by default
#       MAINTAINERS: Update KPROBES and TRACING entries
#       test_kprobes: Move it from kernel/ to lib/
#       docs, kprobes: Remove invalid URL and add new reference
#       samples/kretprobes: Fix return value if register_kretprobe() failed
#       lib/bootconfig: Fix the xbc_get_info kerneldoc
#       ...
# < /opt/cross/kisskb/korg/gcc-11.1.0-nolibc/x86_64-linux/bin/x86_64-linux-gcc --version
# < /opt/cross/kisskb/korg/gcc-11.1.0-nolibc/x86_64-linux/bin/x86_64-linux-ld --version
# < git log --format=%s --max-count=1 79ef0c00142519bc34e1341447f3797436cc48bf
# < make -s -j 80 ARCH=x86 O=/kisskb/build/linus_x86_64_defconfig_x86_64-gcc11 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-11.1.0-nolibc/x86_64-linux/bin/x86_64-linux-  x86_64_defconfig
# < make -s -j 80 ARCH=x86 O=/kisskb/build/linus_x86_64_defconfig_x86_64-gcc11 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-11.1.0-nolibc/x86_64-linux/bin/x86_64-linux-  help
# make -s -j 80 ARCH=x86 O=/kisskb/build/linus_x86_64_defconfig_x86_64-gcc11 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-11.1.0-nolibc/x86_64-linux/bin/x86_64-linux-  olddefconfig
# make -s -j 80 ARCH=x86 O=/kisskb/build/linus_x86_64_defconfig_x86_64-gcc11 CROSS_COMPILE=/opt/cross/kisskb/korg/gcc-11.1.0-nolibc/x86_64-linux/bin/x86_64-linux-  
Completed OK
# rm -rf /kisskb/build/linus_x86_64_defconfig_x86_64-gcc11
# Build took: 0:03:32.883280