tracing: Factorize the events profile accounting

Factorize the events enabling accounting in a common tracing core
helper. This reduces the size of the profile_enable() and
profile_disable() callbacks for each trace events.

Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Acked-by: Steven Rostedt <rostedt@goodmis.org>
Acked-by: Li Zefan <lizf@cn.fujitsu.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Jason Baron <jbaron@redhat.com>
Cc: Masami Hiramatsu <mhiramat@redhat.com>
Cc: Ingo Molnar <mingo@elte.hu>

1 files changed, 8 insertions, 20 deletions

diff --git a/include/trace/ftrace.h b/include/trace/ftrace.h
index 72a3b437b829..a822087857e9 100644
--- a/include/trace/ftrace.h
+++ b/include/trace/ftrace.h
@@ -382,20 +382,14 @@ static inline int ftrace_get_offsets_##call(				\
  *
  * NOTE: The insertion profile callback (ftrace_profile_<call>) is defined later
  *
- * static int ftrace_profile_enable_<call>(struct ftrace_event_call *event_call)
+ * static int ftrace_profile_enable_<call>(void)
  * {
- *      int ret = 0;
- *
- *      if (!atomic_inc_return(&event_call->profile_count))
- *              ret = register_trace_<call>(ftrace_profile_<call>);
- *
- *      return ret;
+ *      return register_trace_<call>(ftrace_profile_<call>);
  * }
  *
- * static void ftrace_profile_disable_<call>(struct ftrace_event_call *event_call)
+ * static void ftrace_profile_disable_<call>(void)
  * {
- *      if (atomic_add_negative(-1, &event->call->profile_count))
- *              unregister_trace_<call>(ftrace_profile_<call>);
+ *      unregister_trace_<call>(ftrace_profile_<call>);
  * }
  *
  */
@@ -405,20 +399,14 @@ static inline int ftrace_get_offsets_##call(				\
                                                                         \
 static void ftrace_profile_##call(proto);                               \
                                                                         \
-static int ftrace_profile_enable_##call(struct ftrace_event_call *event_call) \
+static int ftrace_profile_enable_##call(void)                           \
 {                                                                       \
-        int ret = 0;                                                    \
-                                                                        \
-        if (!atomic_inc_return(&event_call->profile_count))             \
-                ret = register_trace_##call(ftrace_profile_##call);     \
-                                                                        \
-        return ret;                                                     \
+        return register_trace_##call(ftrace_profile_##call);            \
 }                                                                       \
                                                                         \
-static void ftrace_profile_disable_##call(struct ftrace_event_call *event_call)\
+static void ftrace_profile_disable_##call(void)                         \
 {                                                                       \
-        if (atomic_add_negative(-1, &event_call->profile_count))        \
-                unregister_trace_##call(ftrace_profile_##call);         \
+        unregister_trace_##call(ftrace_profile_##call);                 \
 }
 
 #include TRACE_INCLUDE(TRACE_INCLUDE_FILE)