[PATCH v2 0/4] perf: add option to limit callchain stack scan to increase speed

[Waiman Long <Waiman.Long@hp.com>]

v1->v2:
 - Include a compilation fix patch and a code streamlining patch 
   into the patch set.
 - Use the __stringify() macro in stringify.h instead of adding a
   duplicate macro.
 - Add the --max-stack option to perf-top as well.
 
This perf patch set contains the following changes:

Patch 1 - Fix a perf tool compilation error that happens on SLES 11
          sp3 system.
Patch 2 - Streamline the append_chain() function to make it run a bit
          faster.
Patch 3 - Add a --max-stack option to perf-report to speed up its
          processing at the expense of less backtrace information
          available.
Patch 4 - Add a similar --max-stack option to perf-top.

Waiman Long (4):
  perf: Fix potential compilation error with some compilers
  perf: streamline append_chain() function
  perf-report: add --max-stack option to limit callchain stack scan
  perf-top: add --max-stack option to limit callchain stack scan

 tools/perf/Documentation/perf-report.txt           |    8 +++++++
 tools/perf/Documentation/perf-top.txt              |    8 +++++++
 tools/perf/builtin-report.c                        |   22 +++++++++++++++----
 tools/perf/builtin-top.c                           |    9 ++++++-
 tools/perf/util/callchain.c                        |    9 +++----
 tools/perf/util/machine.c                          |   14 ++++++++----
 tools/perf/util/machine.h                          |    3 +-
 .../perf/util/scripting-engines/trace-event-perl.c |    6 ++++-
 tools/perf/util/session.c                          |    3 +-
 tools/perf/util/top.h                              |    1 +
 10 files changed, 63 insertions(+), 20 deletions(-)