trace_event__tp_format
return IS_ERR(trace_event__tp_format("kmem", "kmalloc_node")) ?
return IS_ERR(trace_event__tp_format("sched", "sched_stat_wait")) ?
waking_event = trace_event__tp_format("sched", "sched_waking");
sc->tp_format = trace_event__tp_format("syscalls", tp_name);
sc->tp_format = trace_event__tp_format("syscalls", tp_name);
tp_format = trace_event__tp_format(evsel->tp_sys, evsel->tp_name);
trace_event__tp_format(const char *sys, const char *name);