//
	// Checking for statusDone here would not be a complete fix, as the PID
	// could still be waited on and reused prior to blockUntilWaitable.
	switch p.pidStatus() {
	case statusReleased:
		return nil, syscall.EINVAL
	}

	// If we can block until Wait4 will succeed immediately, do so.
	ready, err := p.blockUntilWaitable()
	if err != nil {
		return nil, err
	}
	if ready {
		// Mark the process done now, before the call to Wait4,

	// because the PID recycle issue doesn't exist (IOW, pidfd, unlike PID,
	// is guaranteed to refer to one particular process). Thus, there is no
	// need for the workaround (blockUntilWaitable + sigMu) from pidWait.
	//
	// We _do_ need to be careful about reuse of the pidfd FD number when
	// closing the pidfd. See handle for more details.
	handle, status := p.handleTransientAcquire()
	switch status {