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| author | Tom Zanussi <tzanussi@gmail.com> | 2009-04-17 00:27:08 -0500 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-04-17 18:28:27 +0200 |
| commit | ac1adc55fc71c7515caa2eb0e63e49b3d1c6a47c (patch) | |
| tree | 7a97cf9512572c53d0802725f8e0ad6a2d4b2204 /include/trace | |
| parent | 46de405f25f1d9fa73b657ffbb752aa0cc87a91d (diff) | |
| download | linux-ac1adc55fc71c7515caa2eb0e63e49b3d1c6a47c.tar.bz2 | |
tracing/filters: add filter_mutex to protect filter predicates
This patch adds a filter_mutex to prevent the filter predicates from
being accessed concurrently by various external functions.
It's based on a previous patch by Li Zefan:
"[PATCH 7/7] tracing/filters: make filter preds RCU safe"
v2 changes:
- fixed wrong value returned in a add_subsystem_pred() failure case
noticed by Li Zefan.
[ Impact: fix trace filter corruption/crashes on parallel access ]
Signed-off-by: Tom Zanussi <tzanussi@gmail.com>
Reviewed-by: Li Zefan <lizf@cn.fujitsu.com>
Tested-by: Li Zefan <lizf@cn.fujitsu.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: paulmck@linux.vnet.ibm.com
LKML-Reference: <1239946028.6639.13.camel@tropicana>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'include/trace')
0 files changed, 0 insertions, 0 deletions