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Commit 1ed0c597 authored by Frederic Weisbecker's avatar Frederic Weisbecker
Browse files

tracing: New macro to set up initial event flags value 



This introduces the new TRACE_EVENT_FLAGS() macro in order
to set up initial event flags value.

This macro must simply follow the definition of a trace event
and take the event name and the flag value as parameters:

TRACE_EVENT(my_event, .....
....
);

TRACE_EVENT_FLAGS(my_event, 1)

This will set up 1 as the initial my_event->flags value.

Signed-off-by: default avatarFrederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Li Zefan <lizf@cn.fujitsu.com>
Cc: Jason Baron <jbaron@redhat.com>
parent 61c32659

include/linux/tracepoint.h

+4 −0
Original line number Diff line number Diff line
@@ -234,6 +234,8 @@ do_trace: \ 
				PARAMS(void *__data, proto),		\

				PARAMS(__data, args))



#define TRACE_EVENT_FLAGS(event, flag)



#endif /* DECLARE_TRACE */



#ifndef TRACE_EVENT
@@ -354,4 +356,6 @@ do_trace: \ 
		assign, print, reg, unreg)			\

	DECLARE_TRACE(name, PARAMS(proto), PARAMS(args))



#define TRACE_EVENT_FLAGS(event, flag)



#endif /* ifdef TRACE_EVENT (see note above) */

include/trace/ftrace.h

+12 −0
Original line number Diff line number Diff line
@@ -82,6 +82,15 @@ 
	TRACE_EVENT(name, PARAMS(proto), PARAMS(args),			\

		PARAMS(tstruct), PARAMS(assign), PARAMS(print))		\



#undef TRACE_EVENT_FLAGS

#define TRACE_EVENT_FLAGS(name, value)					\

	static int __init trace_init_flags_##name(void)			\

	{								\

		event_##name.flags = value;				\

		return 0;						\

	}								\

	early_initcall(trace_init_flags_##name);



#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)
@@ -129,6 +138,9 @@ 
#define DEFINE_EVENT_PRINT(template, name, proto, args, print)	\

	DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))



#undef TRACE_EVENT_FLAGS

#define TRACE_EVENT_FLAGS(event, flag)



#include TRACE_INCLUDE(TRACE_INCLUDE_FILE)



/*