1 files changed, 18 insertions, 28 deletions

diff --git a/include/linux/tracepoint.h b/include/linux/tracepoint.h
index 0341f2e2698a..63a3f7a80580 100644
--- a/include/linux/tracepoint.h
+++ b/include/linux/tracepoint.h
@@ -23,6 +23,8 @@ struct tracepoint;
 struct tracepoint {
         const char *name;               /* Tracepoint name */
         int state;                      /* State. */
+        void (*regfunc)(void);
+        void (*unregfunc)(void);
         void **funcs;
 } __attribute__((aligned(32)));         /*
                                          * Aligned on 32 bytes because it is
@@ -60,10 +62,8 @@ struct tracepoint {
  * Make sure the alignment of the structure in the __tracepoints section will
  * not add unwanted padding between the beginning of the section and the
  * structure. Force alignment to the same alignment as the section start.
- * An optional set of (un)registration functions can be passed to perform any
- * additional (un)registration work.
  */
-#define DECLARE_TRACE_WITH_CALLBACK(name, proto, args, reg, unreg)      \
+#define DECLARE_TRACE(name, proto, args)                                \
         extern struct tracepoint __tracepoint_##name;                   \
         static inline void trace_##name(proto)                          \
         {                                                               \
@@ -73,36 +73,23 @@ struct tracepoint {
         }                                                               \
         static inline int register_trace_##name(void (*probe)(proto))   \
         {                                                               \
-                int ret;                                                \
-                void (*func)(void) = reg;                               \
-                                                                        \
-                ret = tracepoint_probe_register(#name, (void *)probe);  \
-                if (func && !ret)                                       \
-                        func();                                         \
-                return ret;                                             \
+                return tracepoint_probe_register(#name, (void *)probe); \
         }                                                               \
         static inline int unregister_trace_##name(void (*probe)(proto)) \
         {                                                               \
-                int ret;                                                \
-                void (*func)(void) = unreg;                             \
-                                                                        \
-                ret = tracepoint_probe_unregister(#name, (void *)probe);\
-                if (func && !ret)                                       \
-                        func();                                         \
-                return ret;                                             \
+                return tracepoint_probe_unregister(#name, (void *)probe);\
         }
 
 
-#define DECLARE_TRACE(name, proto, args)                                 \
-        DECLARE_TRACE_WITH_CALLBACK(name, TP_PROTO(proto), TP_ARGS(args),\
-                                        NULL, NULL);
-
-#define DEFINE_TRACE(name)                                              \
+#define DEFINE_TRACE_FN(name, reg, unreg)                               \
         static const char __tpstrtab_##name[]                           \
         __attribute__((section("__tracepoints_strings"))) = #name;      \
         struct tracepoint __tracepoint_##name                           \
         __attribute__((section("__tracepoints"), aligned(32))) =        \
-                { __tpstrtab_##name, 0, NULL }
+                { __tpstrtab_##name, 0, reg, unreg, NULL }
+
+#define DEFINE_TRACE(name)                                              \
+        DEFINE_TRACE_FN(name, NULL, NULL);
 
 #define EXPORT_TRACEPOINT_SYMBOL_GPL(name)                              \
         EXPORT_SYMBOL_GPL(__tracepoint_##name)
@@ -113,7 +100,7 @@ extern void tracepoint_update_probe_range(struct tracepoint *begin,
         struct tracepoint *end);
 
 #else /* !CONFIG_TRACEPOINTS */
-#define DECLARE_TRACE_WITH_CALLBACK(name, proto, args, reg, unreg)      \
+#define DECLARE_TRACE(name, proto, args)                                \
         static inline void _do_trace_##name(struct tracepoint *tp, proto) \
         { }                                                             \
         static inline void trace_##name(proto)                          \
@@ -127,10 +114,7 @@ extern void tracepoint_update_probe_range(struct tracepoint *begin,
                 return -ENOSYS;                                         \
         }
 
-#define DECLARE_TRACE(name, proto, args)                                 \
-        DECLARE_TRACE_WITH_CALLBACK(name, TP_PROTO(proto), TP_ARGS(args),\
-                                        NULL, NULL);
-
+#define DEFINE_TRACE_FN(name, reg, unreg)
 #define DEFINE_TRACE(name)
 #define EXPORT_TRACEPOINT_SYMBOL_GPL(name)
 #define EXPORT_TRACEPOINT_SYMBOL(name)
@@ -291,9 +275,15 @@ static inline void tracepoint_synchronize_unregister(void)
  * can also by used by generic instrumentation like SystemTap), and
  * it is also used to expose a structured trace record in
  * /sys/kernel/debug/tracing/events/.
+ *
+ * A set of (un)registration functions can be passed to the variant
+ * TRACE_EVENT_FN to perform any (un)registration work.
  */
 
 #define TRACE_EVENT(name, proto, args, struct, assign, print)   \
         DECLARE_TRACE(name, PARAMS(proto), PARAMS(args))
+#define TRACE_EVENT_FN(name, proto, args, struct,               \
+                assign, print, reg, unreg)                      \
+        DECLARE_TRACE(name, PARAMS(proto), PARAMS(args))
 
 #endif /* ifdef TRACE_EVENT (see note above) */