Commit 2701121b authored by Denis Kirjanov's avatar Denis Kirjanov Committed by Steven Rostedt
Browse files

tracing: Introduce TRACE_EVENT_FN_COND macro 

TRACE_EVENT_FN can't be used in some circumstances
like invoking trace functions from offlined CPU due
to RCU usage.

This patch adds the TRACE_EVENT_FN_COND macro
to make such trace points conditional.

Link: http://lkml.kernel.org/r/1450124286-4822-1-git-send-email-kda@linux-powerpc.org



Signed-off-by: default avatarDenis Kirjanov <kda@linux-powerpc.org>
Signed-off-by: default avatarSteven Rostedt <rostedt@goodmis.org>
parent ff078d8f

include/linux/tracepoint.h

+4 −0
Original line number Diff line number Diff line
@@ -493,6 +493,10 @@ extern void syscall_unregfunc(void); 
#define TRACE_EVENT_FN(name, proto, args, struct,		\

		assign, print, reg, unreg)			\

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

#define TRACE_EVENT_FN_COND(name, proto, args, cond, struct,		\

		assign, print, reg, unreg)			\

	DECLARE_TRACE_CONDITION(name, PARAMS(proto),	\

			PARAMS(args), PARAMS(cond))

#define TRACE_EVENT_CONDITION(name, proto, args, cond,		\

			      struct, assign, print)		\

	DECLARE_TRACE_CONDITION(name, PARAMS(proto),		\

include/trace/define_trace.h

+6 −0
Original line number Diff line number Diff line
@@ -40,6 +40,11 @@ 
		assign, print, reg, unreg)			\

	DEFINE_TRACE_FN(name, reg, unreg)



#undef TRACE_EVENT_FN_COND

#define TRACE_EVENT_FN_COND(name, proto, args, cond, tstruct,		\

		assign, print, reg, unreg)			\

	DEFINE_TRACE_FN(name, reg, unreg)



#undef DEFINE_EVENT

#define DEFINE_EVENT(template, name, proto, args) \

	DEFINE_TRACE(name)
@@ -93,6 +98,7 @@ 


#undef TRACE_EVENT

#undef TRACE_EVENT_FN

#undef TRACE_EVENT_FN_COND

#undef TRACE_EVENT_CONDITION

#undef DECLARE_EVENT_CLASS

#undef DEFINE_EVENT

include/trace/trace_events.h

+6 −0
Original line number Diff line number Diff line
@@ -123,6 +123,12 @@ TRACE_MAKE_SYSTEM_STR(); 
	TRACE_EVENT(name, PARAMS(proto), PARAMS(args),			\

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



#undef TRACE_EVENT_FN_COND

#define TRACE_EVENT_FN_COND(name, proto, args, cond, tstruct,	\

		assign, print, reg, unreg)				\

	TRACE_EVENT_CONDITION(name, PARAMS(proto), PARAMS(args), PARAMS(cond),		\

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



#undef TRACE_EVENT_FLAGS

#define TRACE_EVENT_FLAGS(name, value)					\

	__TRACE_EVENT_FLAGS(name, value)

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