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>

1 files changed, 6 insertions, 4 deletions

diff --git a/include/linux/tracepoint.h b/include/linux/tracepoint.h
index 69648c54a326..c60a791f8874 100644
--- 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)