tracer_init
ret = tracer_init(trace, tr);
int tracer_init(struct tracer *t, struct trace_array *tr);
ret = tracer_init(trace, tr);
ret = tracer_init(trace, tr);
ret = tracer_init(trace, tr);
ret = tracer_init(trace, tr);
ret = tracer_init(trace, tr);
ret = tracer_init(trace, tr);
ret = tracer_init(trace, tr);