tracepoints: samples, fix teardown

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 <[email protected]> Signed-off-by: Ingo Molnar <[email protected]>
Scorpiion · Nov 16, 2008 · 2504ea5 · 2504ea5
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commit 2504ea5
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diff --git a/samples/tracepoints/tracepoint-probe-sample.c b/samples/tracepoints/tracepoint-probe-sample.c
@@ -46,6 +46,7 @@ void __exit tp_sample_trace_exit(void)
 {
 	unregister_trace_subsys_eventb(probe_subsys_eventb);
 	unregister_trace_subsys_event(probe_subsys_event);
+	tracepoint_synchronize_unregister();
 }
 
 module_exit(tp_sample_trace_exit);

diff --git a/samples/tracepoints/tracepoint-probe-sample2.c b/samples/tracepoints/tracepoint-probe-sample2.c
@@ -33,6 +33,7 @@ module_init(tp_sample_trace_init);
 void __exit tp_sample_trace_exit(void)
 {
 	unregister_trace_subsys_event(probe_subsys_event);
+	tracepoint_synchronize_unregister();
 }
 
 module_exit(tp_sample_trace_exit);