[PATCH 04/19] tools lib traceevent: Unregister handler when hrtimer plugin is unloaded

From: Arnaldo Carvalho de Melo
Date: Fri Jan 17 2014 - 10:01:47 EST

From: Namhyung Kim <namhyung@xxxxxxxxxx>

The timer handlers should be unregistered when the plugin is unloaded
otherwise they'll try to access invalid memory.

Signed-off-by: Namhyung Kim <namhyung@xxxxxxxxxx>
Reviewed-by: Jiri Olsa <jolsa@xxxxxxxxxx>
Acked-by: Steven Rostedt <rostedt@xxxxxxxxxxx>
Cc: Frederic Weisbecker <fweisbec@xxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxxxxx>
Cc: Jiri Olsa <jolsa@xxxxxxxxxx>
Cc: Namhyung Kim <namhyung.kim@xxxxxxx>
Cc: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx>
Cc: Steven Rostedt <rostedt@xxxxxxxxxxx>
Link: http://lkml.kernel.org/r/1389839478-5887-5-git-send-email-namhyung@xxxxxxxxxx
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
tools/lib/traceevent/plugin_hrtimer.c | 10 ++++++++++
1 file changed, 10 insertions(+)

diff --git a/tools/lib/traceevent/plugin_hrtimer.c b/tools/lib/traceevent/plugin_hrtimer.c
index 0b0ebf30aa44..12bf14cc1152 100644
--- a/tools/lib/traceevent/plugin_hrtimer.c
+++ b/tools/lib/traceevent/plugin_hrtimer.c
@@ -76,3 +76,13 @@ int PEVENT_PLUGIN_LOADER(struct pevent *pevent)
timer_start_handler, NULL);
return 0;
+void PEVENT_PLUGIN_UNLOADER(struct pevent *pevent)
+ pevent_unregister_event_handler(pevent, -1,
+ "timer", "hrtimer_expire_entry",
+ timer_expire_handler, NULL);
+ pevent_unregister_event_handler(pevent, -1, "timer", "hrtimer_start",
+ timer_start_handler, NULL);

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