[PATCHv2 0/10] ftrace/filter: Trace events filtering related fixies

[Jiri Olsa <jolsa@redhat.com>]

hi,

on the way to perf/ftrace filtering changes, I made some changes
to the current events filtering code. It could be divided into 3
parts roughly:

- remove unnecessary dynamic allocations (patches 1 - 4)
- unify the predicate tree walking (patches 5 - 9)
- added startup test for event filtering (patch 10)

attached patches:
- 01/10 tracing/filter: Use static allocation for filter predicates
- 02/10 tracing/filter: Separate predicate init and filter addition
- 03/10 tracing/filter: Remove field_name from filter_pred struct
- 04/10 tracing/filter: Simplify tracepoint event lookup
- 05/10 tracing/filter: Unify predicate tree walking, change check_pred_tree function to use it
- 06/10 tracing/filter: Change count_leafs function to use walk_pred_tree
- 07/10 tracing/filter: Change fold_pred_tree function to use walk_pred_tree
- 08/10 tracing/filter: Change fold_pred function to use walk_pred_tree
- 09/10 tracing/filter: Change filter_match_preds function to use walk_pred_tree
- 10/10 tracing/filter: Add startup tests for events filter

v2 changes:
- 02/10 - changed patch change log
- 06/10 - putting functionality out of WARN_ON
- 09/10 - using WARN_ON_ONCE instead of BUG_ON
        - putting functionality out of WARN_ON
- 10/10 - moved/renamed test.h into kernel/trace/trace_events_filter_test.h

wbr,
jirka
---
 kernel/trace/Makefile                   |    2 +
 kernel/trace/trace.h                    |   14 +-
 kernel/trace/trace_events_filter.c      |  786 ++++++++++++++++++-------------
 kernel/trace/trace_events_filter_test.h |   50 ++
 4 files changed, 510 insertions(+), 342 deletions(-)