linux-kernel - [PATCH 04/12] tools lib traceevent: Unregister handler when hrtimer plugin unloaded

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Date:	Thu, 16 Jan 2014 11:31:10 +0900
From:	Namhyung Kim <namhyung@...nel.org>
To:	Steven Rostedt <rostedt@...dmis.org>,
	Arnaldo Carvalho de Melo <acme@...stprotocols.net>
Cc:	Frederic Weisbecker <fweisbec@...il.com>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Ingo Molnar <mingo@...nel.org>,
	Namhyung Kim <namhyung.kim@....com>,
	LKML <linux-kernel@...r.kernel.org>, Jiri Olsa <jolsa@...hat.com>
Subject: [PATCH 04/12] tools lib traceevent: Unregister handler when hrtimer plugin unloaded

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

Acked-by: Steven Rostedt <rostedt@...dmis.org>
Reviewed-by: Jiri Olsa <jolsa@...hat.com>
Signed-off-by: Namhyung Kim <namhyung@...nel.org>
---
 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);
+}
-- 
1.7.11.7

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