tracepoints: use unregister return value

Impact: bugfix.

Unregistering a tracepoint can fail. Return the error value.

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

diff --git a/include/linux/tracepoint.h b/include/linux/tracepoint.h
index 69648c5..c60a791 100644 (file)
--- a/include/linux/tracepoint.h
+++ b/include/linux/tracepoint.h
@@ -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_range(struct tracepoint *begin,
        {                                                               \
                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)