register_tracer
if (register_tracer(&blk_tracer) != 0) {
register_tracer(&nop_trace);
int register_tracer(struct tracer *type);
return register_tracer(&branch_trace);
return register_tracer(&function_trace);
return register_tracer(&graph_trace);
ret = register_tracer(&hwlat_tracer);
register_tracer(&irqsoff_tracer);
register_tracer(&preemptoff_tracer);
register_tracer(&preemptirqsoff_tracer);
return register_tracer(&mmio_tracer);
return register_tracer(&timerlat_tracer);
ret = register_tracer(&osnoise_tracer);
ret = register_tracer(&wakeup_tracer);
ret = register_tracer(&wakeup_rt_tracer);
ret = register_tracer(&wakeup_dl_tracer);