[PATCH 0/5] tracing/core: various fixes

[Frederic Weisbecker]

Hi Ingo, Steven,

I've gathered various tracing fixes that were posted recently.

Note: the commit b11c53e12f94a46b50bccc7a1a953d7ca1d54a31
	(ftrace: Add task_comm support for trace_event)
      looks good to me. This v3 solves the two following unhandled
      dependencies in v1:

ENABLE_EVENT_TRACING -> CONTEXT_SWITCH_TRACER
EVENT_TRACING -> CONTEXT_SWITCH_TRACER

The latter is tricky because CONTEXT_SWITCH_TRACER depends
on CONFIG_FTRACE (the tracers menu) from which EVENT_TRACING
is excluded. A build error can then occur if something selects
CONFIG_TRACING elsewhere.

The fix written by Zhaolei follows the {ENABLE_}EVENT_TRACING
view: we now have CONTEXT_SWITCH_TRACER and ENABLE_CONTEXT_SWITCH_TRACER.

The former is used by EVENT_TRACING to record cmdlines.
The latter selects CONTEXT_SWITCH_TRACER plus CONFIG_TRACING.
To sum up, ENABLE_CONTEXT_SWITCH_TRACER acts only as a "relay".

It looks good to me, tell me and Zhaolei if you have doubts
about it.

Thanks.

The following changes since commit 5537937696c55530447c20aa27daccb8d0d29b33:
  Ming Lei (1):
        ftrace: fix check for return value of register_module_notifier in event_trace_init

are available in the git repository at:

  git://git.kernel.org/pub/scm/linux/kernel/git/frederic/random-tracing.git
	tracing/core

Lai Jiangshan (1):
      tracing: add trace_event_read_lock()

Li Zefan (1):
      tracing/events: change the type of __str_loc_item to unsigned short

Pekka Enberg (1):
      kmemtrace: fix kernel parameter documentation

Zhaolei (2):
      ftrace: Add task_comm support for trace_event
      ftrace: clean up of using ftrace_event_enable_disable()

 Documentation/kernel-parameters.txt |   10 --------
 include/trace/ftrace.h              |    2 +-
 kernel/trace/Kconfig                |    9 +++++-
 kernel/trace/trace.c                |    8 ++++++
 kernel/trace/trace_events.c         |   42 +++++++++++++---------------------
 kernel/trace/trace_output.c         |   25 +++++++++++++++-----
 kernel/trace/trace_output.h         |    2 +
 7 files changed, 52 insertions(+), 46 deletions(-)
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