pid_has_task
if (metadata.pid && pid_has_task(event->pid, PIDTYPE_TGID))
if (likely(pid_has_task(pid, PIDTYPE_PID))) {
(!wo->wo_pid || !pid_has_task(wo->wo_pid, wo->wo_type)))
if (!pid_has_task(pid, PIDTYPE_PID))
if (!(flags & PIDFD_THREAD) && !pid_has_task(pid, PIDTYPE_TGID))
if (pid_has_task(pid, tmp))
return pid_has_task(pid, PIDTYPE_TGID) ? pid : NULL;