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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2014-05-03 15:30:44 (GMT) |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2014-05-03 15:30:44 (GMT) |
| commit | 00622e61eda46c7f8833afbee6bd34449a9a4e7e (patch) | |
| tree | e5bf2716392944f6bca76647f85cd591a3e639a5 | |
| parent | 6c6ca9c2a5b97ab37ffd1b091d15eb5cd3f1bf23 (diff) | |
| parent | 561a4fe851ccab9dd0d14989ab566f9392d9f8b5 (diff) | |
| download | linux-00622e61eda46c7f8833afbee6bd34449a9a4e7e.tar.xz | |
Merge tag 'trace-fixes-v3.15-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace
Pull tracing fix from Steven Rostedt:
"This is a small fix where the trigger code used the wrong
rcu_dereference(). It required rcu_dereference_sched() instead of the
normal rcu_dereference(). It produces a nasty RCU lockdep splat due
to the incorrect rcu notation"
Acked-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
* tag 'trace-fixes-v3.15-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace:
tracing: Use rcu_dereference_sched() for trace event triggers
| -rw-r--r-- | kernel/trace/trace_events_trigger.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/trace/trace_events_trigger.c b/kernel/trace/trace_events_trigger.c index 925f537..4747b47 100644 --- a/kernel/trace/trace_events_trigger.c +++ b/kernel/trace/trace_events_trigger.c @@ -77,7 +77,7 @@ event_triggers_call(struct ftrace_event_file *file, void *rec) data->ops->func(data); continue; } - filter = rcu_dereference(data->filter); + filter = rcu_dereference_sched(data->filter); if (filter && !filter_match_preds(filter, rec)) continue; if (data->cmd_ops->post_trigger) { |