Merge branch 'tip/perf/core' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-2.6-trace into perf/core

4 files changed, 52 insertions, 10 deletions

diff --git a/include/linux/ftrace_event.h b/include/linux/ftrace_event.h
index 725bf6bd39f..47e3997f7b5 100644
--- a/include/linux/ftrace_event.h
+++ b/include/linux/ftrace_event.h
@@ -225,6 +225,10 @@ enum {
 	FILTER_PTR_STRING,
 };
 
+#define EVENT_STORAGE_SIZE 128
+extern struct mutex event_storage_mutex;
+extern char event_storage[EVENT_STORAGE_SIZE];
+
 extern int trace_event_raw_init(struct ftrace_event_call *call);
 extern int trace_define_field(struct ftrace_event_call *call, const char *type,
 			      const char *name, int offset, int size,
diff --git a/include/linux/tracepoint.h b/include/linux/tracepoint.h
index 5a6074fcd81..d3e4f87e95c 100644
--- a/include/linux/tracepoint.h
+++ b/include/linux/tracepoint.h
@@ -106,6 +106,7 @@ static inline void tracepoint_update_probe_range(struct tracepoint *begin,
 
 #define TP_PROTO(args...)	args
 #define TP_ARGS(args...)	args
+#define TP_CONDITION(args...)	args
 
 #ifdef CONFIG_TRACEPOINTS
 
@@ -119,12 +120,14 @@ static inline void tracepoint_update_probe_range(struct tracepoint *begin,
  * as "(void *, void)". The DECLARE_TRACE_NOARGS() will pass in just
  * "void *data", where as the DECLARE_TRACE() will pass in "void *data, proto".
  */
-#define __DO_TRACE(tp, proto, args)					\
+#define __DO_TRACE(tp, proto, args, cond)				\
 	do {								\
 		struct tracepoint_func *it_func_ptr;			\
 		void *it_func;						\
 		void *__data;						\
 									\
+		if (!(cond))						\
+			return;						\
 		rcu_read_lock_sched_notrace();				\
 		it_func_ptr = rcu_dereference_sched((tp)->funcs);	\
 		if (it_func_ptr) {					\
@@ -142,7 +145,7 @@ static inline void tracepoint_update_probe_range(struct tracepoint *begin,
  * not add unwanted padding between the beginning of the section and the
  * structure. Force alignment to the same alignment as the section start.
  */
-#define __DECLARE_TRACE(name, proto, args, data_proto, data_args)	\
+#define __DECLARE_TRACE(name, proto, args, cond, data_proto, data_args)	\
 	extern struct tracepoint __tracepoint_##name;			\
 	static inline void trace_##name(proto)				\
 	{								\
@@ -151,7 +154,8 @@ static inline void tracepoint_update_probe_range(struct tracepoint *begin,
 do_trace:								\
 			__DO_TRACE(&__tracepoint_##name,		\
 				TP_PROTO(data_proto),			\
-				TP_ARGS(data_args));			\
+				TP_ARGS(data_args),			\
+				TP_CONDITION(cond));			\
 	}								\
 	static inline int						\
 	register_trace_##name(void (*probe)(data_proto), void *data)	\
@@ -186,7 +190,7 @@ do_trace:								\
 	EXPORT_SYMBOL(__tracepoint_##name)
 
 #else /* !CONFIG_TRACEPOINTS */
-#define __DECLARE_TRACE(name, proto, args, data_proto, data_args)	\
+#define __DECLARE_TRACE(name, proto, args, cond, data_proto, data_args)	\
 	static inline void trace_##name(proto)				\
 	{ }								\
 	static inline int						\
@@ -227,13 +231,18 @@ do_trace:								\
  * "void *__data, proto" as the callback prototype.
  */
 #define DECLARE_TRACE_NOARGS(name)					\
-		__DECLARE_TRACE(name, void, , void *__data, __data)
+		__DECLARE_TRACE(name, void, , 1, void *__data, __data)
 
 #define DECLARE_TRACE(name, proto, args)				\
-		__DECLARE_TRACE(name, PARAMS(proto), PARAMS(args),	\
+		__DECLARE_TRACE(name, PARAMS(proto), PARAMS(args), 1,	\
 				PARAMS(void *__data, proto),		\
 				PARAMS(__data, args))
 
+#define DECLARE_TRACE_CONDITION(name, proto, args, cond)		\
+	__DECLARE_TRACE(name, PARAMS(proto), PARAMS(args), PARAMS(cond), \
+			PARAMS(void *__data, proto),			\
+			PARAMS(__data, args))
+
 #define TRACE_EVENT_FLAGS(event, flag)
 
 #endif /* DECLARE_TRACE */
@@ -349,12 +358,20 @@ do_trace:								\
 	DECLARE_TRACE(name, PARAMS(proto), PARAMS(args))
 #define DEFINE_EVENT_PRINT(template, name, proto, args, print)	\
 	DECLARE_TRACE(name, PARAMS(proto), PARAMS(args))
+#define DEFINE_EVENT_CONDITION(template, name, proto,		\
+			       args, cond)			\
+	DECLARE_TRACE_CONDITION(name, PARAMS(proto),		\
+				PARAMS(args), PARAMS(cond))
 
 #define TRACE_EVENT(name, proto, args, struct, assign, print)	\
 	DECLARE_TRACE(name, PARAMS(proto), PARAMS(args))
 #define TRACE_EVENT_FN(name, proto, args, struct,		\
 		assign, print, reg, unreg)			\
 	DECLARE_TRACE(name, PARAMS(proto), PARAMS(args))
+#define TRACE_EVENT_CONDITION(name, proto, args, cond,		\
+			      struct, assign, print)		\
+	DECLARE_TRACE_CONDITION(name, PARAMS(proto),		\
+				PARAMS(args), PARAMS(cond))
 
 #define TRACE_EVENT_FLAGS(event, flag)
 
diff --git a/include/trace/define_trace.h b/include/trace/define_trace.h
index 1dfab540151..b0b4eb24d59 100644
--- a/include/trace/define_trace.h
+++ b/include/trace/define_trace.h
@@ -26,6 +26,15 @@
 #define TRACE_EVENT(name, proto, args, tstruct, assign, print)	\
 	DEFINE_TRACE(name)
 
+#undef TRACE_EVENT_CONDITION
+#define TRACE_EVENT_CONDITION(name, proto, args, cond, tstruct, assign, print) \
+	TRACE_EVENT(name,						\
+		PARAMS(proto),						\
+		PARAMS(args),						\
+		PARAMS(tstruct),					\
+		PARAMS(assign),						\
+		PARAMS(print))
+
 #undef TRACE_EVENT_FN
 #define TRACE_EVENT_FN(name, proto, args, tstruct,		\
 		assign, print, reg, unreg)			\
@@ -39,6 +48,10 @@
 #define DEFINE_EVENT_PRINT(template, name, proto, args, print)	\
 	DEFINE_TRACE(name)
 
+#undef DEFINE_EVENT_CONDITION
+#define DEFINE_EVENT_CONDITION(template, name, proto, args, cond) \
+	DEFINE_EVENT(template, name, PARAMS(proto), PARAMS(args))
+
 #undef DECLARE_TRACE
 #define DECLARE_TRACE(name, proto, args)	\
 	DEFINE_TRACE(name)
@@ -75,9 +88,11 @@
 
 #undef TRACE_EVENT
 #undef TRACE_EVENT_FN
+#undef TRACE_EVENT_CONDITION
 #undef DECLARE_EVENT_CLASS
 #undef DEFINE_EVENT
 #undef DEFINE_EVENT_PRINT
+#undef DEFINE_EVENT_CONDITION
 #undef TRACE_HEADER_MULTI_READ
 #undef DECLARE_TRACE
 
diff --git a/include/trace/ftrace.h b/include/trace/ftrace.h
index e718a917d89..e16610c208c 100644
--- a/include/trace/ftrace.h
+++ b/include/trace/ftrace.h
@@ -296,13 +296,19 @@ static struct trace_event_functions ftrace_event_type_funcs_##call = {	\
 
 #undef __array
 #define __array(type, item, len)					\
-	BUILD_BUG_ON(len > MAX_FILTER_STR_VAL);				\
-	ret = trace_define_field(event_call, #type "[" #len "]", #item,	\
+	do {								\
+		mutex_lock(&event_storage_mutex);			\
+		BUILD_BUG_ON(len > MAX_FILTER_STR_VAL);			\
+		snprintf(event_storage, sizeof(event_storage),		\
+			 "%s[%d]", #type, len);				\
+		ret = trace_define_field(event_call, event_storage, #item, \
 				 offsetof(typeof(field), item),		\
 				 sizeof(field.item),			\
 				 is_signed_type(type), FILTER_OTHER);	\
-	if (ret)							\
-		return ret;
+		mutex_unlock(&event_storage_mutex);			\
+		if (ret)						\
+			return ret;					\
+	} while (0);
 
 #undef __dynamic_array
 #define __dynamic_array(type, item, len)				       \