[PATCH 07/12] tools lib traceevent: Unregister handler when sched_switch plugin unloaded

[Namhyung Kim <namhyung@kernel.org>]

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

Acked-by: Steven Rostedt <rostedt@goodmis.org>
Reviewed-by: Jiri Olsa <jolsa@redhat.com>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
---
 tools/lib/traceevent/plugin_sched_switch.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/tools/lib/traceevent/plugin_sched_switch.c b/tools/lib/traceevent/plugin_sched_switch.c
index fea3724aa24f..f1ce60065258 100644
--- a/tools/lib/traceevent/plugin_sched_switch.c
+++ b/tools/lib/traceevent/plugin_sched_switch.c
@@ -146,3 +146,15 @@ int PEVENT_PLUGIN_LOADER(struct pevent *pevent)
 				      sched_wakeup_handler, NULL);
 	return 0;
 }
+
+void PEVENT_PLUGIN_UNLOADER(struct pevent *pevent)
+{
+	pevent_unregister_event_handler(pevent, -1, "sched", "sched_switch",
+					sched_switch_handler, NULL);
+
+	pevent_unregister_event_handler(pevent, -1, "sched", "sched_wakeup",
+					sched_wakeup_handler, NULL);
+
+	pevent_unregister_event_handler(pevent, -1, "sched", "sched_wakeup_new",
+					sched_wakeup_handler, NULL);
+}
-- 
1.7.11.7