[GIT PULL] tracing: Changes for 5.6

[Steven Rostedt]

Linus,

Tracing updates:

 - Added new "bootconfig".
   Looks for a file appended to initrd to add boot config options.
   This has been discussed thoroughly at Linux Plumbers.
   Very useful for adding kprobes at bootup.

 - 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

 - Various other small fixes and clean ups


Please pull the latest trace-v5.6 tree, which can be found at:


  git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace.git
trace-v5.6

Tag SHA1: e8b1f8525eeac87b9db3051f347e3defd8e2fb8b
Head SHA1: 2b90927c77c973771cc658d639724d5b247a83eb


Alex Shi (5):
      ftrace: Remove abandoned macros
      ftrace: Remove NR_TO_INIT macro
      ring-buffer: Remove abandoned macro RB_MISSED_FLAGS
      tracing: Remove unused TRACE_SEQ_BUF_USED
      trace/kprobe: Remove unused MAX_KPROBE_CMDLINE_SIZE

Colin Ian King (1):
      tools: bootconfig: Fix spelling mistake "faile" -> "failed"

Dan Carpenter (2):
      tracing/boot: Fix an IS_ERR() vs NULL bug
      tracing: Remove unneeded NULL check

Fabian Frederick (1):
      ring-bufer: kernel-doc warning fixes

Hou Pengyang (1):
      tracing: Fix comments about trace/ftrace.h

Josef Bacik (1):
      tracing: Set kernel_stack's caller size properly

Luis Henriques (1):
      tracing: Fix tracing_stat return values in error handling paths

Masami Hiramatsu (28):
      bootconfig: Add Extra Boot Config support
      bootconfig: Load boot config from the tail of initrd
      tools: bootconfig: Add bootconfig command
      tools: bootconfig: Add bootconfig test script
      proc: bootconfig: Add /proc/bootconfig to show boot config list
      init/main.c: Alloc initcall_command_line in do_initcall() and free it
      bootconfig: init: Allow admin to use bootconfig for kernel command line
      bootconfig: init: Allow admin to use bootconfig for init command line
      Documentation: bootconfig: Add a doc for extended boot config
      tracing: Apply soft-disabled and filter to tracepoints printk
      tracing: kprobes: Output kprobe event to printk buffer
      tracing: kprobes: Register to dynevent earlier stage
      tracing: Accept different type for synthetic event fields
      tracing: Add NULL trace-array check in print_synth_event()
      tracing/boot: Add boot-time tracing
      tracing/boot: Add per-event settings
      tracing/boot Add kprobe event support
      tracing/boot: Add synthetic event support
      tracing/boot: Add instance node support
      tracing/boot: Add cpu_mask option support
      tracing/boot: Add function tracer filter options
      Documentation: tracing: Add boot-time tracing document
      tracing: trigger: Replace unneeded RCU-list traversals
      bootconfig: Fix Kconfig help message for BOOT_CONFIG
      Documentation: bootconfig: Fix typos in bootconfig documentation
      Documentation: tracing: Fix typos in boot-time tracing documentation
      tracing/boot: Include required headers and sort it alphabetically
      tracing/boot: Move external function declarations to kernel/trace/trace.h

Mathieu Desnoyers (1):
      tracing: Fix sched switch start/stop refcount racy updates

Mauro Carvalho Chehab (1):
      docs: tracing: Fix a broken label

Steven Rostedt (VMware) (13):
      perf: Make struct ring_buffer less ambiguous
      tracing: Rename trace_buffer to array_buffer
      tracing: Make struct ring_buffer less ambiguous
      ring-buffer: Fix kernel doc for rb_update_event()
      tracing: Allow trace_printk() to nest in other tracing code
      tracing: Fix uninitialized buffer var on early exit to trace_vbprintk()
      tracing: Fix very unlikely race of registering two stat tracers
      tracing: Decrement trace_array when bootconfig creates an instance
      tracing: Use pr_err() instead of WARN() for memory failures
      tracing: Move all function tracing configs together
      tracing: Move tracing test module configs together
      tracing: Move mmio tracer config up with the other tracers
      tracing: Move tracing selftests to bottom of menu

Tom Zanussi (21):
      tracing: Simplify assignment parsing for hist triggers
      tracing: Add hist trigger error messages for sort specification
      tracing: Add 'hist:' to hist trigger error log error string
      tracing: Add new testcases for hist trigger parsing errors
      tracing: Add trace_array_find/_get() to find instance trace arrays
      tracing: Add trace_get/put_event_file()
      tracing: Add synth_event_delete()
      tracing: Add dynamic event command creation interface
      tracing: Add synthetic event command generation functions
      tracing: Add synth_event_trace() and related functions
      tracing: Add synth event generation test module
      tracing: Add kprobe event command generation functions
      tracing: Change trace_boot to use kprobe_event interface
      tracing: Add kprobe event command generation test module
      tracing: Documentation for in-kernel synthetic event API
      tracing: Change trace_boot to use synth_event interface
      tracing: Fix now invalid var_ref_vals assumption in trace action
      tracing: Consolidate some synth_event_trace code
      tracing: Remove check_arg() callbacks from dynevent args
      tracing: Remove useless code in dynevent_arg_pair_add()
      tracing: Use seq_buf for building dynevent_cmd string

Vasily Averin (3):
      ftrace: fpid_next() should increase position index
      tracing: eval_map_next() should always increase position index
      trigger_next should increase position index

----
 Documentation/admin-guide/bootconfig.rst           |  188 ++++
 Documentation/admin-guide/index.rst                |    1 +
 Documentation/trace/boottime-trace.rst             |  184 ++++
 Documentation/trace/events.rst                     |  515 ++++++++++
 Documentation/trace/index.rst                      |    1 +
 Documentation/trace/kprobetrace.rst                |    1 +
 MAINTAINERS                                        |    9 +
 drivers/oprofile/cpu_buffer.c                      |    2 +-
 fs/proc/Makefile                                   |    1 +
 fs/proc/bootconfig.c                               |   89 ++
 include/linux/bootconfig.h                         |  224 ++++
 include/linux/perf_event.h                         |    6 +-
 include/linux/ring_buffer.h                        |  110 +-
 include/linux/trace_events.h                       |  131 ++-
 include/trace/trace_events.h                       |   11 +-
 init/Kconfig                                       |   14 +
 init/main.c                                        |  213 +++-
 kernel/events/core.c                               |   42 +-
 kernel/events/internal.h                           |   34 +-
 kernel/events/ring_buffer.c                        |   54 +-
 kernel/trace/Kconfig                               |  360 ++++---
 kernel/trace/Makefile                              |    3 +
 kernel/trace/blktrace.c                            |    8 +-
 kernel/trace/ftrace.c                              |   22 +-
 kernel/trace/kprobe_event_gen_test.c               |  225 ++++
 kernel/trace/ring_buffer.c                         |  135 +--
 kernel/trace/ring_buffer_benchmark.c               |    2 +-
 kernel/trace/synth_event_gen_test.c                |  523 ++++++++++
 kernel/trace/trace.c                               |  453 +++++----
 kernel/trace/trace.h                               |   69 +-
 kernel/trace/trace_boot.c                          |  334 ++++++
 kernel/trace/trace_branch.c                        |    6 +-
 kernel/trace/trace_dynevent.c                      |  212 ++++
 kernel/trace/trace_dynevent.h                      |   32 +
 kernel/trace/trace_entries.h                       |    2 +-
 kernel/trace/trace_events.c                        |  106 +-
 kernel/trace/trace_events_hist.c                   | 1071 ++++++++++++++++++--
 kernel/trace/trace_events_trigger.c                |   27 +-
 kernel/trace/trace_functions.c                     |    8 +-
 kernel/trace/trace_functions_graph.c               |   14 +-
 kernel/trace/trace_hwlat.c                         |    2 +-
 kernel/trace/trace_irqsoff.c                       |    8 +-
 kernel/trace/trace_kdb.c                           |    8 +-
 kernel/trace/trace_kprobe.c                        |  238 ++++-
 kernel/trace/trace_mmiotrace.c                     |   12 +-
 kernel/trace/trace_output.c                        |    2 +-
 kernel/trace/trace_sched_switch.c                  |    4 +-
 kernel/trace/trace_sched_wakeup.c                  |   20 +-
 kernel/trace/trace_selftest.c                      |   26 +-
 kernel/trace/trace_seq.c                           |    3 -
 kernel/trace/trace_stat.c                          |   31 +-
 kernel/trace/trace_syscalls.c                      |    8 +-
 kernel/trace/trace_uprobe.c                        |    2 +-
 lib/Kconfig                                        |    3 +
 lib/Makefile                                       |    2 +
 lib/bootconfig.c                                   |  803 +++++++++++++++
 tools/Makefile                                     |   11 +-
 tools/bootconfig/.gitignore                        |    1 +
 tools/bootconfig/Makefile                          |   23 +
 tools/bootconfig/include/linux/bootconfig.h        |    7 +
 tools/bootconfig/include/linux/bug.h               |   12 +
 tools/bootconfig/include/linux/ctype.h             |    7 +
 tools/bootconfig/include/linux/errno.h             |    7 +
 tools/bootconfig/include/linux/kernel.h            |   18 +
 tools/bootconfig/include/linux/printk.h            |   17 +
 tools/bootconfig/include/linux/string.h            |   32 +
 tools/bootconfig/main.c                            |  353 +++++++
 .../samples/bad-array-space-comment.bconf          |    5 +
 tools/bootconfig/samples/bad-array.bconf           |    2 +
 tools/bootconfig/samples/bad-dotword.bconf         |    4 +
 tools/bootconfig/samples/bad-empty.bconf           |    1 +
 tools/bootconfig/samples/bad-keyerror.bconf        |    2 +
 tools/bootconfig/samples/bad-longkey.bconf         |    1 +
 tools/bootconfig/samples/bad-manywords.bconf       |    1 +
 tools/bootconfig/samples/bad-no-keyword.bconf      |    2 +
 tools/bootconfig/samples/bad-nonprintable.bconf    |    2 +
 tools/bootconfig/samples/bad-spaceword.bconf       |    2 +
 tools/bootconfig/samples/bad-tree.bconf            |    5 +
 tools/bootconfig/samples/bad-value.bconf           |    3 +
 tools/bootconfig/samples/escaped.bconf             |    3 +
 .../samples/good-array-space-comment.bconf         |    4 +
 .../samples/good-comment-after-value.bconf         |    1 +
 tools/bootconfig/samples/good-printables.bconf     |    2 +
 tools/bootconfig/samples/good-simple.bconf         |   11 +
 tools/bootconfig/samples/good-single.bconf         |    4 +
 .../samples/good-space-after-value.bconf           |    1 +
 tools/bootconfig/samples/good-tree.bconf           |   12 +
 tools/bootconfig/test-bootconfig.sh                |  105 ++
 .../test.d/trigger/trigger-hist-syntax-errors.tc   |   32 +
 89 files changed, 6464 insertions(+), 843 deletions(-)
 create mode 100644 Documentation/admin-guide/bootconfig.rst
 create mode 100644 Documentation/trace/boottime-trace.rst
 create mode 100644 fs/proc/bootconfig.c
 create mode 100644 include/linux/bootconfig.h
 create mode 100644 kernel/trace/kprobe_event_gen_test.c
 create mode 100644 kernel/trace/synth_event_gen_test.c
 create mode 100644 kernel/trace/trace_boot.c
 create mode 100644 lib/bootconfig.c
 create mode 100644 tools/bootconfig/.gitignore
 create mode 100644 tools/bootconfig/Makefile
 create mode 100644 tools/bootconfig/include/linux/bootconfig.h
 create mode 100644 tools/bootconfig/include/linux/bug.h
 create mode 100644 tools/bootconfig/include/linux/ctype.h
 create mode 100644 tools/bootconfig/include/linux/errno.h
 create mode 100644 tools/bootconfig/include/linux/kernel.h
 create mode 100644 tools/bootconfig/include/linux/printk.h
 create mode 100644 tools/bootconfig/include/linux/string.h
 create mode 100644 tools/bootconfig/main.c
 create mode 100644 tools/bootconfig/samples/bad-array-space-comment.bconf
 create mode 100644 tools/bootconfig/samples/bad-array.bconf
 create mode 100644 tools/bootconfig/samples/bad-dotword.bconf
 create mode 100644 tools/bootconfig/samples/bad-empty.bconf
 create mode 100644 tools/bootconfig/samples/bad-keyerror.bconf
 create mode 100644 tools/bootconfig/samples/bad-longkey.bconf
 create mode 100644 tools/bootconfig/samples/bad-manywords.bconf
 create mode 100644 tools/bootconfig/samples/bad-no-keyword.bconf
 create mode 100644 tools/bootconfig/samples/bad-nonprintable.bconf
 create mode 100644 tools/bootconfig/samples/bad-spaceword.bconf
 create mode 100644 tools/bootconfig/samples/bad-tree.bconf
 create mode 100644 tools/bootconfig/samples/bad-value.bconf
 create mode 100644 tools/bootconfig/samples/escaped.bconf
 create mode 100644 tools/bootconfig/samples/good-array-space-comment.bconf
 create mode 100644 tools/bootconfig/samples/good-comment-after-value.bconf
 create mode 100644 tools/bootconfig/samples/good-printables.bconf
 create mode 100644 tools/bootconfig/samples/good-simple.bconf
 create mode 100644 tools/bootconfig/samples/good-single.bconf
 create mode 100644 tools/bootconfig/samples/good-space-after-value.bconf
 create mode 100644 tools/bootconfig/samples/good-tree.bconf
 create mode 100755 tools/bootconfig/test-bootconfig.sh
 create mode 100644 tools/testing/selftests/ftrace/test.d/trigger/trigger-hist-syntax-errors.tc
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