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tracepoints: samples, fix teardown

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Impact: fix a bug in sample tracepoints

Need a tracepoint_synchronize_unregister() before the end of exit() to
make sure every probe callers have exited the non preemptible section
and thus are not executing the probe code anymore.

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Mathieu Desnoyers 2008-11-14 17:47:41 -05:00 committed by Ingo Molnar
parent a0bca6a59e
commit 2504ea5edf
2 changed files with 2 additions and 0 deletions
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1
samples/tracepoints/tracepoint-probe-sample.c
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@ -46,6 +46,7 @@ void __exit tp_sample_trace_exit(void)
{ {
unregister_trace_subsys_eventb(probe_subsys_eventb); unregister_trace_subsys_eventb(probe_subsys_eventb);
unregister_trace_subsys_event(probe_subsys_event); unregister_trace_subsys_event(probe_subsys_event);
tracepoint_synchronize_unregister();
} }
module_exit(tp_sample_trace_exit); module_exit(tp_sample_trace_exit);

1
samples/tracepoints/tracepoint-probe-sample2.c
View File

@ -33,6 +33,7 @@ module_init(tp_sample_trace_init);
void __exit tp_sample_trace_exit(void) void __exit tp_sample_trace_exit(void)
{ {
unregister_trace_subsys_event(probe_subsys_event); unregister_trace_subsys_event(probe_subsys_event);
tracepoint_synchronize_unregister();
} }
module_exit(tp_sample_trace_exit); module_exit(tp_sample_trace_exit);