podTolerations := spec.Tolerations

	var newTolerations []v1.Toleration
	updated := false
	for i := range podTolerations {
		if toleration.MatchToleration(&podTolerations[i]) {
			if helper.Semantic.DeepEqual(toleration, podTolerations[i]) {
				return false
			}
			newTolerations = append(newTolerations, *toleration)
			updated = true
			continue
		}

		newTolerations = append(newTolerations, podTolerations[i])
	}

	podTolerations := pod.Spec.Tolerations

	var newTolerations []core.Toleration
	updated := false
	for i := range podTolerations {
		if toleration.MatchToleration(&podTolerations[i]) {
			if Semantic.DeepEqual(toleration, podTolerations[i]) {
				return false
			}
			newTolerations = append(newTolerations, *toleration)
			updated = true
			continue
		}

		newTolerations = append(newTolerations, podTolerations[i])
	}

			}
			newNodeSelector[key] = runtimeClassValue
		}
	}

	newTolerations := tolerations.MergeTolerations(pod.Spec.Tolerations, nodeScheduling.Tolerations)

	pod.Spec.NodeSelector = newNodeSelector
	pod.Spec.Tolerations = newTolerations

	return nil
}

func validateOverhead(a admission.Attributes, pod *api.Pod, runtimeClass *nodev1.RuntimeClass) (err error) {

		oldTolerations = oldPod.Spec.Tolerations
	}
	newTolerations := []v1.Toleration{}
	if newPod != nil {
		podName = newPod.Name
		podNamespace = newPod.Namespace
		nodeName = newPod.Spec.NodeName
		newTolerations = newPod.Spec.Tolerations
	}

	if oldPod != nil && newPod != nil && helper.Semantic.DeepEqual(oldTolerations, newTolerations) && oldPod.Spec.NodeName == newPod.Spec.NodeName {
		return
	}

func validateOnlyAddedTolerations(newTolerations []core.Toleration, oldTolerations []core.Toleration, fldPath *field.Path) field.ErrorList {
	allErrs := field.ErrorList{}
	for _, old := range oldTolerations {
		found := false
		oldTolerationClone := old.DeepCopy()
		for _, newToleration := range newTolerations {