};
extern int trace_define_common_fields(struct ftrace_event_call *call);
-extern int trace_define_field(struct ftrace_event_call *call, char *type,
- char *name, int offset, int size, int is_signed,
- int filter_type);
+extern int trace_define_field(struct ftrace_event_call *call, const char *type,
+ const char *name, int offset, int size,
+ int is_signed, int filter_type);
extern int trace_add_event_call(struct ftrace_event_call *call);
extern void trace_remove_event_call(struct ftrace_event_call *call);