trace_define_field
extern int trace_define_field(struct trace_event_call *call, const char *type,
EXPORT_SYMBOL_GPL(trace_define_field);
ret = trace_define_field(call, type, name, offset, size,
ret = trace_define_field(event_call, fmt, parg->name,
ret = trace_define_field(event_call, #type, name, \
ret = trace_define_field(call, meta->types[i],
ret = trace_define_field(call, "__data_loc char[]",