tracing: Fix sign fields in ftrace_define_fields_##call()

Add is_signed_type() call to trace_define_field() in ftrace macros.

The code previously just passed in 0 (false), disregarding whether
or not the field was actually a signed type.
Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com>
LKML-Reference: <4B273D3A.6020007@cn.fujitsu.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>

include/trace/ftrace.h

@@ -414,7 +414,8 @@ ftrace_raw_output_##call(struct trace_iterator *iter, int flags)	\
 	BUILD_BUG_ON(len > MAX_FILTER_STR_VAL);				\
 	ret = trace_define_field(event_call, #type "[" #len "]", #item,	\
 				 offsetof(typeof(field), item),		\
-				 sizeof(field.item), 0, FILTER_OTHER);	\
+				 sizeof(field.item),			\
+				 is_signed_type(type), FILTER_OTHER);	\
 	if (ret)							\
 		return ret;
 
@@ -422,8 +423,8 @@ ftrace_raw_output_##call(struct trace_iterator *iter, int flags)	\
 #define __dynamic_array(type, item, len)				       \
 	ret = trace_define_field(event_call, "__data_loc " #type "[]", #item,  \
 				 offsetof(typeof(field), __data_loc_##item),   \
-				 sizeof(field.__data_loc_##item), 0,	       \
-				 FILTER_OTHER);
+				 sizeof(field.__data_loc_##item),	       \
+				 is_signed_type(type), FILTER_OTHER);
 
 #undef __string
 #define __string(item, src) __dynamic_array(char, item, -1)

kernel/trace/trace_export.c

@@ -158,7 +158,8 @@ ftrace_format_##name(struct ftrace_event_call *unused,			\
 	BUILD_BUG_ON(len > MAX_FILTER_STR_VAL);				\
 	ret = trace_define_field(event_call, #type "[" #len "]", #item,	\
 				 offsetof(typeof(field), item),		\
-				 sizeof(field.item), 0, FILTER_OTHER);	\
+				 sizeof(field.item),			\
+				 is_signed_type(type), FILTER_OTHER);	\
 	if (ret)							\
 		return ret;
 
@@ -168,8 +169,8 @@ ftrace_format_##name(struct ftrace_event_call *unused,			\
 	ret = trace_define_field(event_call, #type "[" #len "]", #item,	\
 				 offsetof(typeof(field),		\
 					  container.item),		\
-				 sizeof(field.container.item), 0,	\
-				 FILTER_OTHER);				\
+				 sizeof(field.container.item),		\
+				 is_signed_type(type), FILTER_OTHER);	\
 	if (ret)							\
 		return ret;