[PATCH 04/10] tracing: __dynamic_array() also defines fields

[Lai Jiangshan <laijs@cn.fujitsu.com>]

dynamic array is also added to struct ftrace_event_call->fields.

FTRACE_ENTRY(bprint) and FTRACE_ENTRY(print) use this __dynamic_array().

Preparing patch for new way of printing format files which uses
defined fields to print formats. So it requires all fields
are added to struct ftrace_event_call->fields.

Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com>
---
diff --git a/kernel/trace/trace_export.c b/kernel/trace/trace_export.c
index 458e5bf..511bc36 100644
--- a/kernel/trace/trace_export.c
+++ b/kernel/trace/trace_export.c
@@ -174,7 +174,12 @@ ftrace_format_##name(struct ftrace_event_call *unused,			\
 		return ret;
 
 #undef __dynamic_array
-#define __dynamic_array(type, item)
+#define __dynamic_array(type, item)					\
+	ret = trace_define_field(event_call, #type, #item,		\
+				 offsetof(typeof(field), item),		\
+				 0, is_signed_type(type), FILTER_OTHER);\
+	if (ret)							\
+		return ret;
 
 #undef FTRACE_ENTRY
 #define FTRACE_ENTRY(name, struct_name, id, tstruct, print)		\