trace_pid_next
return trace_pid_next(pid_list, v, pos);
return trace_pid_next(pid_list, v, pos);
void *trace_pid_next(struct trace_pid_list *pid_list, void *v, loff_t *pos);
return trace_pid_next(pid_list, v, pos);
pid = (unsigned long)trace_pid_next(pid_list, (void *)pid, &l))