tracing: New macro to set up initial event flags value (1ed0c597) · Commits · 戴 / test

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:

Frederic 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>

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)

		/*

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