tracing: Move raw_init from events to class

The raw_init function pointer in the event is used to initialize
various kinds of events. The type of initialization needed is usually
classed to the kind of event it is.

Two events with the same class will always have the same initialization
function, so it makes sense to move this to the class structure.

Perhaps even making a special system structure would work since
the initialization is the same for all events within a system.
But since there's no system structure (yet), this will just move it
to the class.

   text	   data	    bss	    dec	    hex	filename
4913961	1088356	 861512	6863829	 68bbd5	vmlinux.orig
4900375	1053380	 861512	6815267	 67fe23	vmlinux.fields
4900382	1048964	 861512	6810858	 67ecea	vmlinux.init

The text grew very slightly, but this is a constant growth that happened
with the changing of the C files that call the init code.
The bigger savings is the data which will be saved the more events share
a class.

Acked-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Acked-by: Masami Hiramatsu <mhiramat@redhat.com>
Acked-by: Frederic Weisbecker <fweisbec@gmail.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>

1 files changed, 4 insertions, 5 deletions

diff --git a/include/trace/ftrace.h b/include/trace/ftrace.h
index c7e3bcd5d52f..e7eb33420b06 100644
--- a/include/trace/ftrace.h
+++ b/include/trace/ftrace.h
@@ -431,8 +431,9 @@ static inline notrace int ftrace_get_offsets_##call(			\
  * static struct ftrace_event_class __used event_class_<template> = {
  *	.system			= "<system>",
  *	.define_fields		= ftrace_define_fields_<call>,
- *	.fields			= LIST_HEAD_INIT(event_class_##call.fields), \
- *	.probe			= ftrace_raw_event_##call,		\
+ *	.fields			= LIST_HEAD_INIT(event_class_##call.fields),
+ *	.raw_init		= trace_event_raw_init,
+ *	.probe			= ftrace_raw_event_##call,
  * };
  *
  * static struct ftrace_event_call __used
@@ -440,7 +441,6 @@ static inline notrace int ftrace_get_offsets_##call(			\
  * __attribute__((section("_ftrace_events"))) event_<call> = {
  *	.name			= "<call>",
  *	.class			= event_class_<template>,
- *	.raw_init		= trace_event_raw_init,
  *	.event			= &ftrace_event_type_<call>,
  *	.print_fmt		= print_fmt_<call>,
  * };
@@ -566,6 +566,7 @@ static struct ftrace_event_class __used event_class_##call = {		\
 	.system			= __stringify(TRACE_SYSTEM),		\
 	.define_fields		= ftrace_define_fields_##call,		\
 	.fields			= LIST_HEAD_INIT(event_class_##call.fields),\
+	.raw_init		= trace_event_raw_init,			\
 	.probe			= ftrace_raw_event_##call,		\
 	_TRACE_PERF_INIT(call)						\
 };
@@ -579,7 +580,6 @@ __attribute__((section("_ftrace_events"))) event_##call = {		\
 	.name			= #call,				\
 	.class			= &event_class_##template,		\
 	.event			= &ftrace_event_type_##call,		\
-	.raw_init		= trace_event_raw_init,			\
 	.print_fmt		= print_fmt_##template,			\
 };
 
@@ -594,7 +594,6 @@ __attribute__((section("_ftrace_events"))) event_##call = {		\
 	.name			= #call,				\
 	.class			= &event_class_##template,		\
 	.event			= &ftrace_event_type_##call,		\
-	.raw_init		= trace_event_raw_init,			\
 	.print_fmt		= print_fmt_##call,			\
 }