[patch 11/16] Tracepoint Use Unregister Return Value

[Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>]

[-- Attachment #1: tracepoint-use-unregister-return-value.patch --]
[-- Type: text/plain, Size: 1531 bytes --]

Unregistering a tracepoint can fail. Return the error value.

Impact: bugfix.

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
CC: 'Ingo Molnar' <mingo@elte.hu>
CC: Lai Jiangshan <laijs@cn.fujitsu.com>
---
 include/linux/tracepoint.h |   10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

Index: linux-2.6-lttng/include/linux/tracepoint.h
===================================================================
--- linux-2.6-lttng.orig/include/linux/tracepoint.h	2008-09-19 22:40:43.000000000 -0400
+++ linux-2.6-lttng/include/linux/tracepoint.h	2008-09-19 23:03:20.000000000 -0400
@@ -73,9 +73,9 @@ struct tracepoint {
 		return tracepoint_probe_register(#name ":" #proto,	\
 			(void *)probe);					\
 	}								\
-	static inline void unregister_trace_##name(void (*probe)(proto))\
+	static inline int unregister_trace_##name(void (*probe)(proto))	\
 	{								\
-		tracepoint_probe_unregister(#name ":" #proto,		\
+		return tracepoint_probe_unregister(#name ":" #proto,	\
 			(void *)probe);					\
 	}
 
@@ -92,8 +92,10 @@ extern void tracepoint_update_probe_rang
 	{								\
 		return -ENOSYS;						\
 	}								\
-	static inline void unregister_trace_##name(void (*probe)(proto))\
-	{ }
+	static inline int unregister_trace_##name(void (*probe)(proto))	\
+	{								\
+		return -ENOSYS;						\
+	}
 
 static inline void tracepoint_update_probe_range(struct tracepoint *begin,
 	struct tracepoint *end)

-- 
Mathieu Desnoyers
OpenPGP key fingerprint: 8CD5 52C3 8E3C 4140 715F  BA06 3F25 A8FE 3BAE 9A68