ftrace_find_event
trace_event = ftrace_find_event(iter->ent->type);
trace_event = ftrace_find_event(iter->ent->type);
event = ftrace_find_event(entry->type);
event = ftrace_find_event(entry->type);
event = ftrace_find_event(entry->type);
event = ftrace_find_event(entry->type);
probed_event = ftrace_find_event(type);
event = ftrace_find_event(ent->type);
if (ftrace_find_event(event->type))
extern struct trace_event *ftrace_find_event(int type);