diff --git a/go.mod b/go.mod
index 18118f42e3e..0fed09b9696 100644
--- a/go.mod
+++ b/go.mod
@@ -125,7 +125,7 @@ require (
 	k8s.io/controller-manager v0.0.0
 	k8s.io/cri-api v0.0.0
 	k8s.io/csi-translation-lib v0.0.0
-	k8s.io/gengo v0.0.0-20201113003025-83324d819ded
+	k8s.io/gengo v0.0.0-20201214224949-b6c5ce23f027
 	k8s.io/heapster v1.2.0-beta.1
 	k8s.io/klog/v2 v2.4.0
 	k8s.io/kube-aggregator v0.0.0
@@ -505,7 +505,7 @@ replace (
 	k8s.io/controller-manager => ./staging/src/k8s.io/controller-manager
 	k8s.io/cri-api => ./staging/src/k8s.io/cri-api
 	k8s.io/csi-translation-lib => ./staging/src/k8s.io/csi-translation-lib
-	k8s.io/gengo => k8s.io/gengo v0.0.0-20201113003025-83324d819ded
+	k8s.io/gengo => k8s.io/gengo v0.0.0-20201214224949-b6c5ce23f027
 	k8s.io/heapster => k8s.io/heapster v1.2.0-beta.1
 	k8s.io/klog/v2 => k8s.io/klog/v2 v2.4.0
 	k8s.io/kube-aggregator => ./staging/src/k8s.io/kube-aggregator
diff --git a/go.sum b/go.sum
index 32588af3339..e60ba04ee36 100644
--- a/go.sum
+++ b/go.sum
@@ -589,8 +589,8 @@ gotest.tools v2.2.0+incompatible/go.mod h1:DsYFclhRJ6vuDpmuTbkuFWG+y2sxOXAzmJt81
 gotest.tools/v3 v3.0.2 h1:kG1BFyqVHuQoVQiR1bWGnfz/fmHvvuiSPIV7rvl360E=
 gotest.tools/v3 v3.0.2/go.mod h1:3SzNCllyD9/Y+b5r9JIKQ474KzkZyqLqEfYqMsX94Bk=
 honnef.co/go/tools v0.0.1-2020.1.3/go.mod h1:X/FiERA/W4tHapMX5mGpAtMSVEeEUOyHaw9vFzvIQ3k=
-k8s.io/gengo v0.0.0-20201113003025-83324d819ded h1:JApXBKYyB7l9xx+DK7/+mFjC7A9Bt5A93FPvFD0HIFE=
-k8s.io/gengo v0.0.0-20201113003025-83324d819ded/go.mod h1:FiNAH4ZV3gBg2Kwh89tzAEV2be7d5xI0vBa/VySYy3E=
+k8s.io/gengo v0.0.0-20201214224949-b6c5ce23f027 h1:Uusb3oh8XcdzDF/ndlI4ToKTYVlkCSJP39SRY2mfRAw=
+k8s.io/gengo v0.0.0-20201214224949-b6c5ce23f027/go.mod h1:FiNAH4ZV3gBg2Kwh89tzAEV2be7d5xI0vBa/VySYy3E=
 k8s.io/heapster v1.2.0-beta.1 h1:lUsE/AHOMHpi3MLlBEkaU8Esxm5QhdyCrv1o7ot0s84=
 k8s.io/heapster v1.2.0-beta.1/go.mod h1:h1uhptVXMwC8xtZBYsPXKVi8fpdlYkTs6k949KozGrM=
 k8s.io/klog/v2 v2.4.0 h1:7+X0fUguPyrKEC4WjH8iGDg3laWgMo5tMnRTIGTTxGQ=
diff --git a/pkg/apis/apps/v1/zz_generated.defaults.go b/pkg/apis/apps/v1/zz_generated.defaults.go
index 58a99f3f6b6..80dba3b7946 100644
--- a/pkg/apis/apps/v1/zz_generated.defaults.go
+++ b/pkg/apis/apps/v1/zz_generated.defaults.go
@@ -21,8 +21,6 @@ limitations under the License.
 package v1
 
 import (
-	"reflect"
-
 	v1 "k8s.io/api/apps/v1"
 	runtime "k8s.io/apimachinery/pkg/runtime"
 	corev1 "k8s.io/kubernetes/pkg/apis/core/v1"
@@ -109,7 +107,7 @@ func SetObjectDefaults_DaemonSet(in *v1.DaemonSet) {
 		corev1.SetDefaults_Container(a)
 		for j := range a.Ports {
 			b := &a.Ports[j]
-			if reflect.ValueOf(b.Protocol).IsZero() {
+			if b.Protocol == "" {
 				b.Protocol = "TCP"
 			}
 		}
@@ -159,7 +157,7 @@ func SetObjectDefaults_DaemonSet(in *v1.DaemonSet) {
 		corev1.SetDefaults_Container(a)
 		for j := range a.Ports {
 			b := &a.Ports[j]
-			if reflect.ValueOf(b.Protocol).IsZero() {
+			if b.Protocol == "" {
 				b.Protocol = "TCP"
 			}
 		}
@@ -209,7 +207,7 @@ func SetObjectDefaults_DaemonSet(in *v1.DaemonSet) {
 		corev1.SetDefaults_EphemeralContainer(a)
 		for j := range a.EphemeralContainerCommon.Ports {
 			b := &a.EphemeralContainerCommon.Ports[j]
-			if reflect.ValueOf(b.Protocol).IsZero() {
+			if b.Protocol == "" {
 				b.Protocol = "TCP"
 			}
 		}
@@ -330,7 +328,7 @@ func SetObjectDefaults_Deployment(in *v1.Deployment) {
 		corev1.SetDefaults_Container(a)
 		for j := range a.Ports {
 			b := &a.Ports[j]
-			if reflect.ValueOf(b.Protocol).IsZero() {
+			if b.Protocol == "" {
 				b.Protocol = "TCP"
 			}
 		}
@@ -380,7 +378,7 @@ func SetObjectDefaults_Deployment(in *v1.Deployment) {
 		corev1.SetDefaults_Container(a)
 		for j := range a.Ports {
 			b := &a.Ports[j]
-			if reflect.ValueOf(b.Protocol).IsZero() {
+			if b.Protocol == "" {
 				b.Protocol = "TCP"
 			}
 		}
@@ -430,7 +428,7 @@ func SetObjectDefaults_Deployment(in *v1.Deployment) {
 		corev1.SetDefaults_EphemeralContainer(a)
 		for j := range a.EphemeralContainerCommon.Ports {
 			b := &a.EphemeralContainerCommon.Ports[j]
-			if reflect.ValueOf(b.Protocol).IsZero() {
+			if b.Protocol == "" {
 				b.Protocol = "TCP"
 			}
 		}
@@ -551,7 +549,7 @@ func SetObjectDefaults_ReplicaSet(in *v1.ReplicaSet) {
 		corev1.SetDefaults_Container(a)
 		for j := range a.Ports {
 			b := &a.Ports[j]
-			if reflect.ValueOf(b.Protocol).IsZero() {
+			if b.Protocol == "" {
 				b.Protocol = "TCP"
 			}
 		}
@@ -601,7 +599,7 @@ func SetObjectDefaults_ReplicaSet(in *v1.ReplicaSet) {
 		corev1.SetDefaults_Container(a)
 		for j := range a.Ports {
 			b := &a.Ports[j]
-			if reflect.ValueOf(b.Protocol).IsZero() {
+			if b.Protocol == "" {
 				b.Protocol = "TCP"
 			}
 		}
@@ -651,7 +649,7 @@ func SetObjectDefaults_ReplicaSet(in *v1.ReplicaSet) {
 		corev1.SetDefaults_EphemeralContainer(a)
 		for j := range a.EphemeralContainerCommon.Ports {
 			b := &a.EphemeralContainerCommon.Ports[j]
-			if reflect.ValueOf(b.Protocol).IsZero() {
+			if b.Protocol == "" {
 				b.Protocol = "TCP"
 			}
 		}
@@ -772,7 +770,7 @@ func SetObjectDefaults_StatefulSet(in *v1.StatefulSet) {
 		corev1.SetDefaults_Container(a)
 		for j := range a.Ports {
 			b := &a.Ports[j]
-			if reflect.ValueOf(b.Protocol).IsZero() {
+			if b.Protocol == "" {
 				b.Protocol = "TCP"
 			}
 		}
@@ -822,7 +820,7 @@ func SetObjectDefaults_StatefulSet(in *v1.StatefulSet) {
 		corev1.SetDefaults_Container(a)
 		for j := range a.Ports {
 			b := &a.Ports[j]
-			if reflect.ValueOf(b.Protocol).IsZero() {
+			if b.Protocol == "" {
 				b.Protocol = "TCP"
 			}
 		}
@@ -872,7 +870,7 @@ func SetObjectDefaults_StatefulSet(in *v1.StatefulSet) {
 		corev1.SetDefaults_EphemeralContainer(a)
 		for j := range a.EphemeralContainerCommon.Ports {
 			b := &a.EphemeralContainerCommon.Ports[j]
-			if reflect.ValueOf(b.Protocol).IsZero() {
+			if b.Protocol == "" {
 				b.Protocol = "TCP"
 			}
 		}
diff --git a/pkg/apis/apps/v1beta1/zz_generated.defaults.go b/pkg/apis/apps/v1beta1/zz_generated.defaults.go
index f248064ce3e..01e84f4e4f8 100644
--- a/pkg/apis/apps/v1beta1/zz_generated.defaults.go
+++ b/pkg/apis/apps/v1beta1/zz_generated.defaults.go
@@ -21,8 +21,6 @@ limitations under the License.
 package v1beta1
 
 import (
-	"reflect"
-
 	v1beta1 "k8s.io/api/apps/v1beta1"
 	runtime "k8s.io/apimachinery/pkg/runtime"
 	v1 "k8s.io/kubernetes/pkg/apis/core/v1"
@@ -105,7 +103,7 @@ func SetObjectDefaults_Deployment(in *v1beta1.Deployment) {
 		v1.SetDefaults_Container(a)
 		for j := range a.Ports {
 			b := &a.Ports[j]
-			if reflect.ValueOf(b.Protocol).IsZero() {
+			if b.Protocol == "" {
 				b.Protocol = "TCP"
 			}
 		}
@@ -155,7 +153,7 @@ func SetObjectDefaults_Deployment(in *v1beta1.Deployment) {
 		v1.SetDefaults_Container(a)
 		for j := range a.Ports {
 			b := &a.Ports[j]
-			if reflect.ValueOf(b.Protocol).IsZero() {
+			if b.Protocol == "" {
 				b.Protocol = "TCP"
 			}
 		}
@@ -205,7 +203,7 @@ func SetObjectDefaults_Deployment(in *v1beta1.Deployment) {
 		v1.SetDefaults_EphemeralContainer(a)
 		for j := range a.EphemeralContainerCommon.Ports {
 			b := &a.EphemeralContainerCommon.Ports[j]
-			if reflect.ValueOf(b.Protocol).IsZero() {
+			if b.Protocol == "" {
 				b.Protocol = "TCP"
 			}
 		}
@@ -326,7 +324,7 @@ func SetObjectDefaults_StatefulSet(in *v1beta1.StatefulSet) {
 		v1.SetDefaults_Container(a)
 		for j := range a.Ports {
 			b := &a.Ports[j]
-			if reflect.ValueOf(b.Protocol).IsZero() {
+			if b.Protocol == "" {
 				b.Protocol = "TCP"
 			}
 		}
@@ -376,7 +374,7 @@ func SetObjectDefaults_StatefulSet(in *v1beta1.StatefulSet) {
 		v1.SetDefaults_Container(a)
 		for j := range a.Ports {
 			b := &a.Ports[j]
-			if reflect.ValueOf(b.Protocol).IsZero() {
+			if b.Protocol == "" {
 				b.Protocol = "TCP"
 			}
 		}
@@ -426,7 +424,7 @@ func SetObjectDefaults_StatefulSet(in *v1beta1.StatefulSet) {
 		v1.SetDefaults_EphemeralContainer(a)
 		for j := range a.EphemeralContainerCommon.Ports {
 			b := &a.EphemeralContainerCommon.Ports[j]
-			if reflect.ValueOf(b.Protocol).IsZero() {
+			if b.Protocol == "" {
 				b.Protocol = "TCP"
 			}
 		}
diff --git a/pkg/apis/apps/v1beta2/zz_generated.defaults.go b/pkg/apis/apps/v1beta2/zz_generated.defaults.go
index ffabe5f60e7..76d66940c79 100644
--- a/pkg/apis/apps/v1beta2/zz_generated.defaults.go
+++ b/pkg/apis/apps/v1beta2/zz_generated.defaults.go
@@ -21,8 +21,6 @@ limitations under the License.
 package v1beta2
 
 import (
-	"reflect"
-
 	v1beta2 "k8s.io/api/apps/v1beta2"
 	runtime "k8s.io/apimachinery/pkg/runtime"
 	v1 "k8s.io/kubernetes/pkg/apis/core/v1"
@@ -109,7 +107,7 @@ func SetObjectDefaults_DaemonSet(in *v1beta2.DaemonSet) {
 		v1.SetDefaults_Container(a)
 		for j := range a.Ports {
 			b := &a.Ports[j]
-			if reflect.ValueOf(b.Protocol).IsZero() {
+			if b.Protocol == "" {
 				b.Protocol = "TCP"
 			}
 		}
@@ -159,7 +157,7 @@ func SetObjectDefaults_DaemonSet(in *v1beta2.DaemonSet) {
 		v1.SetDefaults_Container(a)
 		for j := range a.Ports {
 			b := &a.Ports[j]
-			if reflect.ValueOf(b.Protocol).IsZero() {
+			if b.Protocol == "" {
 				b.Protocol = "TCP"
 			}
 		}
@@ -209,7 +207,7 @@ func SetObjectDefaults_DaemonSet(in *v1beta2.DaemonSet) {
 		v1.SetDefaults_EphemeralContainer(a)
 		for j := range a.EphemeralContainerCommon.Ports {
 			b := &a.EphemeralContainerCommon.Ports[j]
-			if reflect.ValueOf(b.Protocol).IsZero() {
+			if b.Protocol == "" {
 				b.Protocol = "TCP"
 			}
 		}
@@ -330,7 +328,7 @@ func SetObjectDefaults_Deployment(in *v1beta2.Deployment) {
 		v1.SetDefaults_Container(a)
 		for j := range a.Ports {
 			b := &a.Ports[j]
-			if reflect.ValueOf(b.Protocol).IsZero() {
+			if b.Protocol == "" {
 				b.Protocol = "TCP"
 			}
 		}
@@ -380,7 +378,7 @@ func SetObjectDefaults_Deployment(in *v1beta2.Deployment) {
 		v1.SetDefaults_Container(a)
 		for j := range a.Ports {
 			b := &a.Ports[j]
-			if reflect.ValueOf(b.Protocol).IsZero() {
+			if b.Protocol == "" {
 				b.Protocol = "TCP"
 			}
 		}
@@ -430,7 +428,7 @@ func SetObjectDefaults_Deployment(in *v1beta2.Deployment) {
 		v1.SetDefaults_EphemeralContainer(a)
 		for j := range a.EphemeralContainerCommon.Ports {
 			b := &a.EphemeralContainerCommon.Ports[j]
-			if reflect.ValueOf(b.Protocol).IsZero() {
+			if b.Protocol == "" {
 				b.Protocol = "TCP"
 			}
 		}
@@ -551,7 +549,7 @@ func SetObjectDefaults_ReplicaSet(in *v1beta2.ReplicaSet) {
 		v1.SetDefaults_Container(a)
 		for j := range a.Ports {
 			b := &a.Ports[j]
-			if reflect.ValueOf(b.Protocol).IsZero() {
+			if b.Protocol == "" {
 				b.Protocol = "TCP"
 			}
 		}
@@ -601,7 +599,7 @@ func SetObjectDefaults_ReplicaSet(in *v1beta2.ReplicaSet) {
 		v1.SetDefaults_Container(a)
 		for j := range a.Ports {
 			b := &a.Ports[j]
-			if reflect.ValueOf(b.Protocol).IsZero() {
+			if b.Protocol == "" {
 				b.Protocol = "TCP"
 			}
 		}
@@ -651,7 +649,7 @@ func SetObjectDefaults_ReplicaSet(in *v1beta2.ReplicaSet) {
 		v1.SetDefaults_EphemeralContainer(a)
 		for j := range a.EphemeralContainerCommon.Ports {
 			b := &a.EphemeralContainerCommon.Ports[j]
-			if reflect.ValueOf(b.Protocol).IsZero() {
+			if b.Protocol == "" {
 				b.Protocol = "TCP"
 			}
 		}
@@ -772,7 +770,7 @@ func SetObjectDefaults_StatefulSet(in *v1beta2.StatefulSet) {
 		v1.SetDefaults_Container(a)
 		for j := range a.Ports {
 			b := &a.Ports[j]
-			if reflect.ValueOf(b.Protocol).IsZero() {
+			if b.Protocol == "" {
 				b.Protocol = "TCP"
 			}
 		}
@@ -822,7 +820,7 @@ func SetObjectDefaults_StatefulSet(in *v1beta2.StatefulSet) {
 		v1.SetDefaults_Container(a)
 		for j := range a.Ports {
 			b := &a.Ports[j]
-			if reflect.ValueOf(b.Protocol).IsZero() {
+			if b.Protocol == "" {
 				b.Protocol = "TCP"
 			}
 		}
@@ -872,7 +870,7 @@ func SetObjectDefaults_StatefulSet(in *v1beta2.StatefulSet) {
 		v1.SetDefaults_EphemeralContainer(a)
 		for j := range a.EphemeralContainerCommon.Ports {
 			b := &a.EphemeralContainerCommon.Ports[j]
-			if reflect.ValueOf(b.Protocol).IsZero() {
+			if b.Protocol == "" {
 				b.Protocol = "TCP"
 			}
 		}
diff --git a/pkg/apis/batch/v1/zz_generated.defaults.go b/pkg/apis/batch/v1/zz_generated.defaults.go
index ffeba646f2a..969ea16f223 100644
--- a/pkg/apis/batch/v1/zz_generated.defaults.go
+++ b/pkg/apis/batch/v1/zz_generated.defaults.go
@@ -21,8 +21,6 @@ limitations under the License.
 package v1
 
 import (
-	"reflect"
-
 	v1 "k8s.io/api/batch/v1"
 	runtime "k8s.io/apimachinery/pkg/runtime"
 	corev1 "k8s.io/kubernetes/pkg/apis/core/v1"
@@ -103,7 +101,7 @@ func SetObjectDefaults_Job(in *v1.Job) {
 		corev1.SetDefaults_Container(a)
 		for j := range a.Ports {
 			b := &a.Ports[j]
-			if reflect.ValueOf(b.Protocol).IsZero() {
+			if b.Protocol == "" {
 				b.Protocol = "TCP"
 			}
 		}
@@ -153,7 +151,7 @@ func SetObjectDefaults_Job(in *v1.Job) {
 		corev1.SetDefaults_Container(a)
 		for j := range a.Ports {
 			b := &a.Ports[j]
-			if reflect.ValueOf(b.Protocol).IsZero() {
+			if b.Protocol == "" {
 				b.Protocol = "TCP"
 			}
 		}
@@ -203,7 +201,7 @@ func SetObjectDefaults_Job(in *v1.Job) {
 		corev1.SetDefaults_EphemeralContainer(a)
 		for j := range a.EphemeralContainerCommon.Ports {
 			b := &a.EphemeralContainerCommon.Ports[j]
-			if reflect.ValueOf(b.Protocol).IsZero() {
+			if b.Protocol == "" {
 				b.Protocol = "TCP"
 			}
 		}
diff --git a/pkg/apis/batch/v1beta1/zz_generated.defaults.go b/pkg/apis/batch/v1beta1/zz_generated.defaults.go
index 2b11eb14698..94f57743cd1 100644
--- a/pkg/apis/batch/v1beta1/zz_generated.defaults.go
+++ b/pkg/apis/batch/v1beta1/zz_generated.defaults.go
@@ -21,8 +21,6 @@ limitations under the License.
 package v1beta1
 
 import (
-	"reflect"
-
 	v1beta1 "k8s.io/api/batch/v1beta1"
 	runtime "k8s.io/apimachinery/pkg/runtime"
 	v1 "k8s.io/kubernetes/pkg/apis/core/v1"
@@ -104,7 +102,7 @@ func SetObjectDefaults_CronJob(in *v1beta1.CronJob) {
 		v1.SetDefaults_Container(a)
 		for j := range a.Ports {
 			b := &a.Ports[j]
-			if reflect.ValueOf(b.Protocol).IsZero() {
+			if b.Protocol == "" {
 				b.Protocol = "TCP"
 			}
 		}
@@ -154,7 +152,7 @@ func SetObjectDefaults_CronJob(in *v1beta1.CronJob) {
 		v1.SetDefaults_Container(a)
 		for j := range a.Ports {
 			b := &a.Ports[j]
-			if reflect.ValueOf(b.Protocol).IsZero() {
+			if b.Protocol == "" {
 				b.Protocol = "TCP"
 			}
 		}
@@ -204,7 +202,7 @@ func SetObjectDefaults_CronJob(in *v1beta1.CronJob) {
 		v1.SetDefaults_EphemeralContainer(a)
 		for j := range a.EphemeralContainerCommon.Ports {
 			b := &a.EphemeralContainerCommon.Ports[j]
-			if reflect.ValueOf(b.Protocol).IsZero() {
+			if b.Protocol == "" {
 				b.Protocol = "TCP"
 			}
 		}
@@ -324,7 +322,7 @@ func SetObjectDefaults_JobTemplate(in *v1beta1.JobTemplate) {
 		v1.SetDefaults_Container(a)
 		for j := range a.Ports {
 			b := &a.Ports[j]
-			if reflect.ValueOf(b.Protocol).IsZero() {
+			if b.Protocol == "" {
 				b.Protocol = "TCP"
 			}
 		}
@@ -374,7 +372,7 @@ func SetObjectDefaults_JobTemplate(in *v1beta1.JobTemplate) {
 		v1.SetDefaults_Container(a)
 		for j := range a.Ports {
 			b := &a.Ports[j]
-			if reflect.ValueOf(b.Protocol).IsZero() {
+			if b.Protocol == "" {
 				b.Protocol = "TCP"
 			}
 		}
@@ -424,7 +422,7 @@ func SetObjectDefaults_JobTemplate(in *v1beta1.JobTemplate) {
 		v1.SetDefaults_EphemeralContainer(a)
 		for j := range a.EphemeralContainerCommon.Ports {
 			b := &a.EphemeralContainerCommon.Ports[j]
-			if reflect.ValueOf(b.Protocol).IsZero() {
+			if b.Protocol == "" {
 				b.Protocol = "TCP"
 			}
 		}
diff --git a/pkg/apis/batch/v2alpha1/zz_generated.defaults.go b/pkg/apis/batch/v2alpha1/zz_generated.defaults.go
index eb96b04cb57..3c43daae355 100644
--- a/pkg/apis/batch/v2alpha1/zz_generated.defaults.go
+++ b/pkg/apis/batch/v2alpha1/zz_generated.defaults.go
@@ -21,8 +21,6 @@ limitations under the License.
 package v2alpha1
 
 import (
-	"reflect"
-
 	v2alpha1 "k8s.io/api/batch/v2alpha1"
 	runtime "k8s.io/apimachinery/pkg/runtime"
 	v1 "k8s.io/kubernetes/pkg/apis/core/v1"
@@ -104,7 +102,7 @@ func SetObjectDefaults_CronJob(in *v2alpha1.CronJob) {
 		v1.SetDefaults_Container(a)
 		for j := range a.Ports {
 			b := &a.Ports[j]
-			if reflect.ValueOf(b.Protocol).IsZero() {
+			if b.Protocol == "" {
 				b.Protocol = "TCP"
 			}
 		}
@@ -154,7 +152,7 @@ func SetObjectDefaults_CronJob(in *v2alpha1.CronJob) {
 		v1.SetDefaults_Container(a)
 		for j := range a.Ports {
 			b := &a.Ports[j]
-			if reflect.ValueOf(b.Protocol).IsZero() {
+			if b.Protocol == "" {
 				b.Protocol = "TCP"
 			}
 		}
@@ -204,7 +202,7 @@ func SetObjectDefaults_CronJob(in *v2alpha1.CronJob) {
 		v1.SetDefaults_EphemeralContainer(a)
 		for j := range a.EphemeralContainerCommon.Ports {
 			b := &a.EphemeralContainerCommon.Ports[j]
-			if reflect.ValueOf(b.Protocol).IsZero() {
+			if b.Protocol == "" {
 				b.Protocol = "TCP"
 			}
 		}
@@ -324,7 +322,7 @@ func SetObjectDefaults_JobTemplate(in *v2alpha1.JobTemplate) {
 		v1.SetDefaults_Container(a)
 		for j := range a.Ports {
 			b := &a.Ports[j]
-			if reflect.ValueOf(b.Protocol).IsZero() {
+			if b.Protocol == "" {
 				b.Protocol = "TCP"
 			}
 		}
@@ -374,7 +372,7 @@ func SetObjectDefaults_JobTemplate(in *v2alpha1.JobTemplate) {
 		v1.SetDefaults_Container(a)
 		for j := range a.Ports {
 			b := &a.Ports[j]
-			if reflect.ValueOf(b.Protocol).IsZero() {
+			if b.Protocol == "" {
 				b.Protocol = "TCP"
 			}
 		}
@@ -424,7 +422,7 @@ func SetObjectDefaults_JobTemplate(in *v2alpha1.JobTemplate) {
 		v1.SetDefaults_EphemeralContainer(a)
 		for j := range a.EphemeralContainerCommon.Ports {
 			b := &a.EphemeralContainerCommon.Ports[j]
-			if reflect.ValueOf(b.Protocol).IsZero() {
+			if b.Protocol == "" {
 				b.Protocol = "TCP"
 			}
 		}
diff --git a/pkg/apis/core/v1/zz_generated.defaults.go b/pkg/apis/core/v1/zz_generated.defaults.go
index 89f45a026b6..2863cc3ab8f 100644
--- a/pkg/apis/core/v1/zz_generated.defaults.go
+++ b/pkg/apis/core/v1/zz_generated.defaults.go
@@ -21,8 +21,6 @@ limitations under the License.
 package v1
 
 import (
-	"reflect"
-
 	v1 "k8s.io/api/core/v1"
 	runtime "k8s.io/apimachinery/pkg/runtime"
 )
@@ -93,7 +91,7 @@ func SetObjectDefaults_EphemeralContainers(in *v1.EphemeralContainers) {
 		SetDefaults_EphemeralContainer(a)
 		for j := range a.EphemeralContainerCommon.Ports {
 			b := &a.EphemeralContainerCommon.Ports[j]
-			if reflect.ValueOf(b.Protocol).IsZero() {
+			if b.Protocol == "" {
 				b.Protocol = "TCP"
 			}
 		}
@@ -291,7 +289,7 @@ func SetObjectDefaults_Pod(in *v1.Pod) {
 		SetDefaults_Container(a)
 		for j := range a.Ports {
 			b := &a.Ports[j]
-			if reflect.ValueOf(b.Protocol).IsZero() {
+			if b.Protocol == "" {
 				b.Protocol = "TCP"
 			}
 		}
@@ -341,7 +339,7 @@ func SetObjectDefaults_Pod(in *v1.Pod) {
 		SetDefaults_Container(a)
 		for j := range a.Ports {
 			b := &a.Ports[j]
-			if reflect.ValueOf(b.Protocol).IsZero() {
+			if b.Protocol == "" {
 				b.Protocol = "TCP"
 			}
 		}
@@ -391,7 +389,7 @@ func SetObjectDefaults_Pod(in *v1.Pod) {
 		SetDefaults_EphemeralContainer(a)
 		for j := range a.EphemeralContainerCommon.Ports {
 			b := &a.EphemeralContainerCommon.Ports[j]
-			if reflect.ValueOf(b.Protocol).IsZero() {
+			if b.Protocol == "" {
 				b.Protocol = "TCP"
 			}
 		}
@@ -511,7 +509,7 @@ func SetObjectDefaults_PodTemplate(in *v1.PodTemplate) {
 		SetDefaults_Container(a)
 		for j := range a.Ports {
 			b := &a.Ports[j]
-			if reflect.ValueOf(b.Protocol).IsZero() {
+			if b.Protocol == "" {
 				b.Protocol = "TCP"
 			}
 		}
@@ -561,7 +559,7 @@ func SetObjectDefaults_PodTemplate(in *v1.PodTemplate) {
 		SetDefaults_Container(a)
 		for j := range a.Ports {
 			b := &a.Ports[j]
-			if reflect.ValueOf(b.Protocol).IsZero() {
+			if b.Protocol == "" {
 				b.Protocol = "TCP"
 			}
 		}
@@ -611,7 +609,7 @@ func SetObjectDefaults_PodTemplate(in *v1.PodTemplate) {
 		SetDefaults_EphemeralContainer(a)
 		for j := range a.EphemeralContainerCommon.Ports {
 			b := &a.EphemeralContainerCommon.Ports[j]
-			if reflect.ValueOf(b.Protocol).IsZero() {
+			if b.Protocol == "" {
 				b.Protocol = "TCP"
 			}
 		}
@@ -733,7 +731,7 @@ func SetObjectDefaults_ReplicationController(in *v1.ReplicationController) {
 			SetDefaults_Container(a)
 			for j := range a.Ports {
 				b := &a.Ports[j]
-				if reflect.ValueOf(b.Protocol).IsZero() {
+				if b.Protocol == "" {
 					b.Protocol = "TCP"
 				}
 			}
@@ -783,7 +781,7 @@ func SetObjectDefaults_ReplicationController(in *v1.ReplicationController) {
 			SetDefaults_Container(a)
 			for j := range a.Ports {
 				b := &a.Ports[j]
-				if reflect.ValueOf(b.Protocol).IsZero() {
+				if b.Protocol == "" {
 					b.Protocol = "TCP"
 				}
 			}
@@ -833,7 +831,7 @@ func SetObjectDefaults_ReplicationController(in *v1.ReplicationController) {
 			SetDefaults_EphemeralContainer(a)
 			for j := range a.EphemeralContainerCommon.Ports {
 				b := &a.EphemeralContainerCommon.Ports[j]
-				if reflect.ValueOf(b.Protocol).IsZero() {
+				if b.Protocol == "" {
 					b.Protocol = "TCP"
 				}
 			}
diff --git a/pkg/apis/extensions/v1beta1/zz_generated.defaults.go b/pkg/apis/extensions/v1beta1/zz_generated.defaults.go
index 317003e1dbe..2d28b577976 100644
--- a/pkg/apis/extensions/v1beta1/zz_generated.defaults.go
+++ b/pkg/apis/extensions/v1beta1/zz_generated.defaults.go
@@ -21,8 +21,6 @@ limitations under the License.
 package v1beta1
 
 import (
-	"reflect"
-
 	v1beta1 "k8s.io/api/extensions/v1beta1"
 	runtime "k8s.io/apimachinery/pkg/runtime"
 	v1 "k8s.io/kubernetes/pkg/apis/core/v1"
@@ -113,7 +111,7 @@ func SetObjectDefaults_DaemonSet(in *v1beta1.DaemonSet) {
 		v1.SetDefaults_Container(a)
 		for j := range a.Ports {
 			b := &a.Ports[j]
-			if reflect.ValueOf(b.Protocol).IsZero() {
+			if b.Protocol == "" {
 				b.Protocol = "TCP"
 			}
 		}
@@ -163,7 +161,7 @@ func SetObjectDefaults_DaemonSet(in *v1beta1.DaemonSet) {
 		v1.SetDefaults_Container(a)
 		for j := range a.Ports {
 			b := &a.Ports[j]
-			if reflect.ValueOf(b.Protocol).IsZero() {
+			if b.Protocol == "" {
 				b.Protocol = "TCP"
 			}
 		}
@@ -213,7 +211,7 @@ func SetObjectDefaults_DaemonSet(in *v1beta1.DaemonSet) {
 		v1.SetDefaults_EphemeralContainer(a)
 		for j := range a.EphemeralContainerCommon.Ports {
 			b := &a.EphemeralContainerCommon.Ports[j]
-			if reflect.ValueOf(b.Protocol).IsZero() {
+			if b.Protocol == "" {
 				b.Protocol = "TCP"
 			}
 		}
@@ -334,7 +332,7 @@ func SetObjectDefaults_Deployment(in *v1beta1.Deployment) {
 		v1.SetDefaults_Container(a)
 		for j := range a.Ports {
 			b := &a.Ports[j]
-			if reflect.ValueOf(b.Protocol).IsZero() {
+			if b.Protocol == "" {
 				b.Protocol = "TCP"
 			}
 		}
@@ -384,7 +382,7 @@ func SetObjectDefaults_Deployment(in *v1beta1.Deployment) {
 		v1.SetDefaults_Container(a)
 		for j := range a.Ports {
 			b := &a.Ports[j]
-			if reflect.ValueOf(b.Protocol).IsZero() {
+			if b.Protocol == "" {
 				b.Protocol = "TCP"
 			}
 		}
@@ -434,7 +432,7 @@ func SetObjectDefaults_Deployment(in *v1beta1.Deployment) {
 		v1.SetDefaults_EphemeralContainer(a)
 		for j := range a.EphemeralContainerCommon.Ports {
 			b := &a.EphemeralContainerCommon.Ports[j]
-			if reflect.ValueOf(b.Protocol).IsZero() {
+			if b.Protocol == "" {
 				b.Protocol = "TCP"
 			}
 		}
@@ -596,7 +594,7 @@ func SetObjectDefaults_ReplicaSet(in *v1beta1.ReplicaSet) {
 		v1.SetDefaults_Container(a)
 		for j := range a.Ports {
 			b := &a.Ports[j]
-			if reflect.ValueOf(b.Protocol).IsZero() {
+			if b.Protocol == "" {
 				b.Protocol = "TCP"
 			}
 		}
@@ -646,7 +644,7 @@ func SetObjectDefaults_ReplicaSet(in *v1beta1.ReplicaSet) {
 		v1.SetDefaults_Container(a)
 		for j := range a.Ports {
 			b := &a.Ports[j]
-			if reflect.ValueOf(b.Protocol).IsZero() {
+			if b.Protocol == "" {
 				b.Protocol = "TCP"
 			}
 		}
@@ -696,7 +694,7 @@ func SetObjectDefaults_ReplicaSet(in *v1beta1.ReplicaSet) {
 		v1.SetDefaults_EphemeralContainer(a)
 		for j := range a.EphemeralContainerCommon.Ports {
 			b := &a.EphemeralContainerCommon.Ports[j]
-			if reflect.ValueOf(b.Protocol).IsZero() {
+			if b.Protocol == "" {
 				b.Protocol = "TCP"
 			}
 		}
diff --git a/staging/src/k8s.io/apiextensions-apiserver/go.sum b/staging/src/k8s.io/apiextensions-apiserver/go.sum
index 5e20c4eaea6..69ea8707046 100644
--- a/staging/src/k8s.io/apiextensions-apiserver/go.sum
+++ b/staging/src/k8s.io/apiextensions-apiserver/go.sum
@@ -677,8 +677,8 @@ honnef.co/go/tools v0.0.0-20190523083050-ea95bdfd59fc/go.mod h1:rf3lG4BRIbNafJWh
 honnef.co/go/tools v0.0.1-2019.2.3/go.mod h1:a3bituU0lyd329TUQxRnasdCoJDkEUEAqEt0JzvZhAg=
 honnef.co/go/tools v0.0.1-2020.1.3/go.mod h1:X/FiERA/W4tHapMX5mGpAtMSVEeEUOyHaw9vFzvIQ3k=
 k8s.io/gengo v0.0.0-20200413195148-3a45101e95ac/go.mod h1:ezvh/TsK7cY6rbqRK0oQQ8IAqLxYwwyPxAX1Pzy0ii0=
-k8s.io/gengo v0.0.0-20201113003025-83324d819ded h1:JApXBKYyB7l9xx+DK7/+mFjC7A9Bt5A93FPvFD0HIFE=
-k8s.io/gengo v0.0.0-20201113003025-83324d819ded/go.mod h1:FiNAH4ZV3gBg2Kwh89tzAEV2be7d5xI0vBa/VySYy3E=
+k8s.io/gengo v0.0.0-20201214224949-b6c5ce23f027 h1:Uusb3oh8XcdzDF/ndlI4ToKTYVlkCSJP39SRY2mfRAw=
+k8s.io/gengo v0.0.0-20201214224949-b6c5ce23f027/go.mod h1:FiNAH4ZV3gBg2Kwh89tzAEV2be7d5xI0vBa/VySYy3E=
 k8s.io/klog/v2 v2.0.0/go.mod h1:PBfzABfn139FHAV07az/IF9Wp1bkk3vpT2XSJ76fSDE=
 k8s.io/klog/v2 v2.2.0/go.mod h1:Od+F08eJP+W3HUb4pSrPpgp9DGU4GzlpG/TmITuYh/Y=
 k8s.io/klog/v2 v2.4.0 h1:7+X0fUguPyrKEC4WjH8iGDg3laWgMo5tMnRTIGTTxGQ=
diff --git a/staging/src/k8s.io/code-generator/go.mod b/staging/src/k8s.io/code-generator/go.mod
index 404d8f3c26b..52aa67052e8 100644
--- a/staging/src/k8s.io/code-generator/go.mod
+++ b/staging/src/k8s.io/code-generator/go.mod
@@ -17,7 +17,7 @@ require (
 	golang.org/x/text v0.3.4 // indirect
 	golang.org/x/tools v0.0.0-20200616133436-c1934b75d054 // indirect
 	golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1 // indirect
-	k8s.io/gengo v0.0.0-20201113003025-83324d819ded
+	k8s.io/gengo v0.0.0-20201214224949-b6c5ce23f027
 	k8s.io/klog/v2 v2.4.0
 	k8s.io/kube-openapi v0.0.0-20201113171705-d219536bb9fd
 )
diff --git a/staging/src/k8s.io/code-generator/go.sum b/staging/src/k8s.io/code-generator/go.sum
index af35786dcd7..638fb5c9300 100644
--- a/staging/src/k8s.io/code-generator/go.sum
+++ b/staging/src/k8s.io/code-generator/go.sum
@@ -131,8 +131,8 @@ gopkg.in/yaml.v2 v2.2.8/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c h1:dUUwHk2QECo/6vqA44rthZ8ie2QXMNeKRTHCNY2nXvo=
 gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
 k8s.io/gengo v0.0.0-20200413195148-3a45101e95ac/go.mod h1:ezvh/TsK7cY6rbqRK0oQQ8IAqLxYwwyPxAX1Pzy0ii0=
-k8s.io/gengo v0.0.0-20201113003025-83324d819ded h1:JApXBKYyB7l9xx+DK7/+mFjC7A9Bt5A93FPvFD0HIFE=
-k8s.io/gengo v0.0.0-20201113003025-83324d819ded/go.mod h1:FiNAH4ZV3gBg2Kwh89tzAEV2be7d5xI0vBa/VySYy3E=
+k8s.io/gengo v0.0.0-20201214224949-b6c5ce23f027 h1:Uusb3oh8XcdzDF/ndlI4ToKTYVlkCSJP39SRY2mfRAw=
+k8s.io/gengo v0.0.0-20201214224949-b6c5ce23f027/go.mod h1:FiNAH4ZV3gBg2Kwh89tzAEV2be7d5xI0vBa/VySYy3E=
 k8s.io/klog/v2 v2.0.0/go.mod h1:PBfzABfn139FHAV07az/IF9Wp1bkk3vpT2XSJ76fSDE=
 k8s.io/klog/v2 v2.2.0/go.mod h1:Od+F08eJP+W3HUb4pSrPpgp9DGU4GzlpG/TmITuYh/Y=
 k8s.io/klog/v2 v2.4.0 h1:7+X0fUguPyrKEC4WjH8iGDg3laWgMo5tMnRTIGTTxGQ=
diff --git a/staging/src/k8s.io/kube-aggregator/go.sum b/staging/src/k8s.io/kube-aggregator/go.sum
index 8aa1ffdbab9..3d5634e27b3 100644
--- a/staging/src/k8s.io/kube-aggregator/go.sum
+++ b/staging/src/k8s.io/kube-aggregator/go.sum
@@ -677,8 +677,8 @@ honnef.co/go/tools v0.0.0-20190523083050-ea95bdfd59fc/go.mod h1:rf3lG4BRIbNafJWh
 honnef.co/go/tools v0.0.1-2019.2.3/go.mod h1:a3bituU0lyd329TUQxRnasdCoJDkEUEAqEt0JzvZhAg=
 honnef.co/go/tools v0.0.1-2020.1.3/go.mod h1:X/FiERA/W4tHapMX5mGpAtMSVEeEUOyHaw9vFzvIQ3k=
 k8s.io/gengo v0.0.0-20200413195148-3a45101e95ac/go.mod h1:ezvh/TsK7cY6rbqRK0oQQ8IAqLxYwwyPxAX1Pzy0ii0=
-k8s.io/gengo v0.0.0-20201113003025-83324d819ded h1:JApXBKYyB7l9xx+DK7/+mFjC7A9Bt5A93FPvFD0HIFE=
-k8s.io/gengo v0.0.0-20201113003025-83324d819ded/go.mod h1:FiNAH4ZV3gBg2Kwh89tzAEV2be7d5xI0vBa/VySYy3E=
+k8s.io/gengo v0.0.0-20201214224949-b6c5ce23f027 h1:Uusb3oh8XcdzDF/ndlI4ToKTYVlkCSJP39SRY2mfRAw=
+k8s.io/gengo v0.0.0-20201214224949-b6c5ce23f027/go.mod h1:FiNAH4ZV3gBg2Kwh89tzAEV2be7d5xI0vBa/VySYy3E=
 k8s.io/klog/v2 v2.0.0/go.mod h1:PBfzABfn139FHAV07az/IF9Wp1bkk3vpT2XSJ76fSDE=
 k8s.io/klog/v2 v2.2.0/go.mod h1:Od+F08eJP+W3HUb4pSrPpgp9DGU4GzlpG/TmITuYh/Y=
 k8s.io/klog/v2 v2.4.0 h1:7+X0fUguPyrKEC4WjH8iGDg3laWgMo5tMnRTIGTTxGQ=
diff --git a/staging/src/k8s.io/kubectl/go.sum b/staging/src/k8s.io/kubectl/go.sum
index 0e2bee7a756..65671195da3 100644
--- a/staging/src/k8s.io/kubectl/go.sum
+++ b/staging/src/k8s.io/kubectl/go.sum
@@ -635,7 +635,7 @@ honnef.co/go/tools v0.0.0-20190523083050-ea95bdfd59fc/go.mod h1:rf3lG4BRIbNafJWh
 honnef.co/go/tools v0.0.1-2019.2.3/go.mod h1:a3bituU0lyd329TUQxRnasdCoJDkEUEAqEt0JzvZhAg=
 honnef.co/go/tools v0.0.1-2020.1.3/go.mod h1:X/FiERA/W4tHapMX5mGpAtMSVEeEUOyHaw9vFzvIQ3k=
 k8s.io/gengo v0.0.0-20200413195148-3a45101e95ac/go.mod h1:ezvh/TsK7cY6rbqRK0oQQ8IAqLxYwwyPxAX1Pzy0ii0=
-k8s.io/gengo v0.0.0-20201113003025-83324d819ded/go.mod h1:FiNAH4ZV3gBg2Kwh89tzAEV2be7d5xI0vBa/VySYy3E=
+k8s.io/gengo v0.0.0-20201214224949-b6c5ce23f027/go.mod h1:FiNAH4ZV3gBg2Kwh89tzAEV2be7d5xI0vBa/VySYy3E=
 k8s.io/klog/v2 v2.0.0/go.mod h1:PBfzABfn139FHAV07az/IF9Wp1bkk3vpT2XSJ76fSDE=
 k8s.io/klog/v2 v2.2.0/go.mod h1:Od+F08eJP+W3HUb4pSrPpgp9DGU4GzlpG/TmITuYh/Y=
 k8s.io/klog/v2 v2.4.0 h1:7+X0fUguPyrKEC4WjH8iGDg3laWgMo5tMnRTIGTTxGQ=
diff --git a/staging/src/k8s.io/metrics/go.sum b/staging/src/k8s.io/metrics/go.sum
index daea75c36c8..15f35a6912c 100644
--- a/staging/src/k8s.io/metrics/go.sum
+++ b/staging/src/k8s.io/metrics/go.sum
@@ -427,8 +427,8 @@ honnef.co/go/tools v0.0.0-20190523083050-ea95bdfd59fc/go.mod h1:rf3lG4BRIbNafJWh
 honnef.co/go/tools v0.0.1-2019.2.3/go.mod h1:a3bituU0lyd329TUQxRnasdCoJDkEUEAqEt0JzvZhAg=
 honnef.co/go/tools v0.0.1-2020.1.3/go.mod h1:X/FiERA/W4tHapMX5mGpAtMSVEeEUOyHaw9vFzvIQ3k=
 k8s.io/gengo v0.0.0-20200413195148-3a45101e95ac/go.mod h1:ezvh/TsK7cY6rbqRK0oQQ8IAqLxYwwyPxAX1Pzy0ii0=
-k8s.io/gengo v0.0.0-20201113003025-83324d819ded h1:JApXBKYyB7l9xx+DK7/+mFjC7A9Bt5A93FPvFD0HIFE=
-k8s.io/gengo v0.0.0-20201113003025-83324d819ded/go.mod h1:FiNAH4ZV3gBg2Kwh89tzAEV2be7d5xI0vBa/VySYy3E=
+k8s.io/gengo v0.0.0-20201214224949-b6c5ce23f027 h1:Uusb3oh8XcdzDF/ndlI4ToKTYVlkCSJP39SRY2mfRAw=
+k8s.io/gengo v0.0.0-20201214224949-b6c5ce23f027/go.mod h1:FiNAH4ZV3gBg2Kwh89tzAEV2be7d5xI0vBa/VySYy3E=
 k8s.io/klog/v2 v2.0.0/go.mod h1:PBfzABfn139FHAV07az/IF9Wp1bkk3vpT2XSJ76fSDE=
 k8s.io/klog/v2 v2.2.0/go.mod h1:Od+F08eJP+W3HUb4pSrPpgp9DGU4GzlpG/TmITuYh/Y=
 k8s.io/klog/v2 v2.4.0 h1:7+X0fUguPyrKEC4WjH8iGDg3laWgMo5tMnRTIGTTxGQ=
diff --git a/staging/src/k8s.io/sample-apiserver/go.sum b/staging/src/k8s.io/sample-apiserver/go.sum
index b7273ee9772..68f359a628b 100644
--- a/staging/src/k8s.io/sample-apiserver/go.sum
+++ b/staging/src/k8s.io/sample-apiserver/go.sum
@@ -674,8 +674,8 @@ honnef.co/go/tools v0.0.0-20190523083050-ea95bdfd59fc/go.mod h1:rf3lG4BRIbNafJWh
 honnef.co/go/tools v0.0.1-2019.2.3/go.mod h1:a3bituU0lyd329TUQxRnasdCoJDkEUEAqEt0JzvZhAg=
 honnef.co/go/tools v0.0.1-2020.1.3/go.mod h1:X/FiERA/W4tHapMX5mGpAtMSVEeEUOyHaw9vFzvIQ3k=
 k8s.io/gengo v0.0.0-20200413195148-3a45101e95ac/go.mod h1:ezvh/TsK7cY6rbqRK0oQQ8IAqLxYwwyPxAX1Pzy0ii0=
-k8s.io/gengo v0.0.0-20201113003025-83324d819ded h1:JApXBKYyB7l9xx+DK7/+mFjC7A9Bt5A93FPvFD0HIFE=
-k8s.io/gengo v0.0.0-20201113003025-83324d819ded/go.mod h1:FiNAH4ZV3gBg2Kwh89tzAEV2be7d5xI0vBa/VySYy3E=
+k8s.io/gengo v0.0.0-20201214224949-b6c5ce23f027 h1:Uusb3oh8XcdzDF/ndlI4ToKTYVlkCSJP39SRY2mfRAw=
+k8s.io/gengo v0.0.0-20201214224949-b6c5ce23f027/go.mod h1:FiNAH4ZV3gBg2Kwh89tzAEV2be7d5xI0vBa/VySYy3E=
 k8s.io/klog/v2 v2.0.0/go.mod h1:PBfzABfn139FHAV07az/IF9Wp1bkk3vpT2XSJ76fSDE=
 k8s.io/klog/v2 v2.2.0/go.mod h1:Od+F08eJP+W3HUb4pSrPpgp9DGU4GzlpG/TmITuYh/Y=
 k8s.io/klog/v2 v2.4.0 h1:7+X0fUguPyrKEC4WjH8iGDg3laWgMo5tMnRTIGTTxGQ=
diff --git a/staging/src/k8s.io/sample-controller/go.sum b/staging/src/k8s.io/sample-controller/go.sum
index b152b9c8d7c..29438c5ecaf 100644
--- a/staging/src/k8s.io/sample-controller/go.sum
+++ b/staging/src/k8s.io/sample-controller/go.sum
@@ -433,8 +433,8 @@ honnef.co/go/tools v0.0.0-20190523083050-ea95bdfd59fc/go.mod h1:rf3lG4BRIbNafJWh
 honnef.co/go/tools v0.0.1-2019.2.3/go.mod h1:a3bituU0lyd329TUQxRnasdCoJDkEUEAqEt0JzvZhAg=
 honnef.co/go/tools v0.0.1-2020.1.3/go.mod h1:X/FiERA/W4tHapMX5mGpAtMSVEeEUOyHaw9vFzvIQ3k=
 k8s.io/gengo v0.0.0-20200413195148-3a45101e95ac/go.mod h1:ezvh/TsK7cY6rbqRK0oQQ8IAqLxYwwyPxAX1Pzy0ii0=
-k8s.io/gengo v0.0.0-20201113003025-83324d819ded h1:JApXBKYyB7l9xx+DK7/+mFjC7A9Bt5A93FPvFD0HIFE=
-k8s.io/gengo v0.0.0-20201113003025-83324d819ded/go.mod h1:FiNAH4ZV3gBg2Kwh89tzAEV2be7d5xI0vBa/VySYy3E=
+k8s.io/gengo v0.0.0-20201214224949-b6c5ce23f027 h1:Uusb3oh8XcdzDF/ndlI4ToKTYVlkCSJP39SRY2mfRAw=
+k8s.io/gengo v0.0.0-20201214224949-b6c5ce23f027/go.mod h1:FiNAH4ZV3gBg2Kwh89tzAEV2be7d5xI0vBa/VySYy3E=
 k8s.io/klog/v2 v2.0.0/go.mod h1:PBfzABfn139FHAV07az/IF9Wp1bkk3vpT2XSJ76fSDE=
 k8s.io/klog/v2 v2.2.0/go.mod h1:Od+F08eJP+W3HUb4pSrPpgp9DGU4GzlpG/TmITuYh/Y=
 k8s.io/klog/v2 v2.4.0 h1:7+X0fUguPyrKEC4WjH8iGDg3laWgMo5tMnRTIGTTxGQ=
diff --git a/vendor/k8s.io/gengo/examples/defaulter-gen/generators/defaulter.go b/vendor/k8s.io/gengo/examples/defaulter-gen/generators/defaulter.go
index cdb6f7c7e43..72782b166e5 100644
--- a/vendor/k8s.io/gengo/examples/defaulter-gen/generators/defaulter.go
+++ b/vendor/k8s.io/gengo/examples/defaulter-gen/generators/defaulter.go
@@ -23,6 +23,7 @@ import (
 	"io"
 	"path/filepath"
 	"reflect"
+	"strconv"
 	"strings"
 
 	"k8s.io/gengo/args"
@@ -50,7 +51,7 @@ var typeZeroValue = map[string]interface{}{
 	"int16":       0.,
 	"int32":       0.,
 	"int64":       0.,
-	"byte":        0,
+	"byte":        0.,
 	"float64":     0.,
 	"float32":     0.,
 	"bool":        false,
@@ -839,6 +840,12 @@ type callNode struct {
 	// For example 1 corresponds to setting a default value and taking its pointer while
 	// 2 corresponds to setting a default value and taking its pointer's pointer
 	// 0 implies that no pointers are used
+	// This is used in situations where a field is a pointer to a primitive value rather than a primitive value itself.
+	//
+	//     type A {
+	//       +default="foo"
+	//       Field *string
+	//     }
 	defaultDepth int
 
 	// defaultType is the type of the default value.
@@ -899,80 +906,90 @@ func (n *callNode) writeCalls(varName string, isVarPointer bool, sw *generator.S
 	}
 }
 
+func getTypeZeroValue(t string) (interface{}, error) {
+	defaultZero, ok := typeZeroValue[t]
+	if !ok {
+		return nil, fmt.Errorf("Cannot find zero value for type %v in typeZeroValue", t)
+	}
+
+	// To generate the code for empty string, they must be quoted
+	if defaultZero == "" {
+		defaultZero = strconv.Quote(defaultZero.(string))
+	}
+	return defaultZero, nil
+}
+
 func (n *callNode) writeDefaulter(varName string, index string, isVarPointer bool, sw *generator.SnippetWriter) {
 	if n.defaultValue == "" {
 		return
 	}
-	varPointer := varName
-	if !isVarPointer {
-		varPointer = "&" + varPointer
-	}
-
 	args := generator.Args{
 		"defaultValue": n.defaultValue,
-		"varPointer":   varPointer,
 		"varName":      varName,
 		"index":        index,
 		"varDepth":     n.defaultDepth,
 		"varType":      n.defaultType,
 	}
 
-	if n.index {
-		sw.Do("if reflect.ValueOf($.var$[$.index$]).IsZero() {\n", generator.Args{"var": varName, "index": index})
-		if n.defaultIsPrimitive {
-			if n.defaultDepth > 0 {
-				sw.Do("var ptrVar$.varDepth$ $.varType$ = $.defaultValue$\n", args)
-				for i := n.defaultDepth; i > 0; i-- {
-					sw.Do("ptrVar$.ptri$ := &ptrVar$.i$\n", generator.Args{"i": fmt.Sprintf("%d", i), "ptri": fmt.Sprintf("%d", (i - 1))})
-				}
-				sw.Do("$.varName$[$.index$] = ptrVar0", args)
-			} else {
-				sw.Do("$.varName$[$.index$] = $.defaultValue$", args)
-			}
-		} else {
-			sw.Do("if err := json.Unmarshal([]byte(`$.defaultValue$`), $.varPointer$[$.index$]); err != nil {\n", args)
-			sw.Do("panic(err)\n", nil)
-			sw.Do("}\n", nil)
-		}
-	} else if n.key {
-		mapDefaultVar := index + "_default"
-		args["mapDefaultVar"] = mapDefaultVar
-		sw.Do("if reflect.ValueOf($.var$[$.index$]).IsZero() {\n", generator.Args{"var": varName, "index": index})
+	variablePlaceholder := ""
 
-		if n.defaultIsPrimitive {
-			if n.defaultDepth > 0 {
-				sw.Do("var ptrVar$.varDepth$ $.varType$ = $.defaultValue$\n", args)
-				for i := n.defaultDepth; i > 0; i-- {
-					sw.Do("ptrVar$.ptri$ := &ptrVar$.i$\n", generator.Args{"i": fmt.Sprintf("%d", i), "ptri": fmt.Sprintf("%d", (i - 1))})
-				}
-				sw.Do("$.varName$[$.index$] = ptrVar0", args)
-			} else {
-				sw.Do("$.varName$[$.index$] = $.defaultValue$", args)
+	if n.index {
+		// Defaulting for array
+		variablePlaceholder = "$.varName$[$.index$]"
+	} else if n.key {
+		// Defaulting for map
+		variablePlaceholder = "$.varName$[$.index$]"
+		mapDefaultVar := args["index"].(string) + "_default"
+		args["mapDefaultVar"] = mapDefaultVar
+	} else {
+		// Defaulting for primitive type
+		variablePlaceholder = "$.varName$"
+	}
+
+	// defaultIsPrimitive is true if the type or underlying type (in an array/map) is primitive
+	// or is a pointer to a primitive type
+	// (Eg: int, map[string]*string, []int)
+	if n.defaultIsPrimitive {
+		// If the default value is a primitive when the assigned type is a pointer
+		// keep using the address-of operator on the primitive value until the types match
+		if n.defaultDepth > 0 {
+			sw.Do(fmt.Sprintf("if %s == nil {\n", variablePlaceholder), args)
+			sw.Do("var ptrVar$.varDepth$ $.varType$ = $.defaultValue$\n", args)
+			// We iterate until a depth of 1 instead of 0 because the following line
+			// `if $.varName$ == &ptrVar1` accounts for 1 level already
+			for i := n.defaultDepth; i > 1; i-- {
+				sw.Do("ptrVar$.ptri$ := &ptrVar$.i$\n", generator.Args{"i": fmt.Sprintf("%d", i), "ptri": fmt.Sprintf("%d", (i - 1))})
 			}
+			sw.Do(fmt.Sprintf("%s = &ptrVar1", variablePlaceholder), args)
 		} else {
-			sw.Do("$.mapDefaultVar$ := $.varName$[$.index$]\n", args)
-			sw.Do("if err := json.Unmarshal([]byte(`$.defaultValue$`), &$.mapDefaultVar$); err != nil {\n", args)
-			sw.Do("panic(err)\n", nil)
-			sw.Do("}\n", nil)
-			sw.Do("$.varName$[$.index$] = $.mapDefaultVar$\n", args)
+			// For primitive types, nil checks cannot be used and the zero value must be determined
+			defaultZero, err := getTypeZeroValue(n.defaultType)
+			if err != nil {
+				klog.Error(err)
+			}
+			args["defaultZero"] = defaultZero
+
+			sw.Do(fmt.Sprintf("if %s == $.defaultZero$ {\n", variablePlaceholder), args)
+			sw.Do(fmt.Sprintf("%s = $.defaultValue$", variablePlaceholder), args)
 		}
 	} else {
-		sw.Do("if reflect.ValueOf($.var$).IsZero() {\n", generator.Args{"var": varName})
-
-		if n.defaultIsPrimitive {
-			if n.defaultDepth > 0 {
-				sw.Do("var ptrVar$.varDepth$ $.varType$ = $.defaultValue$\n", args)
-				for i := n.defaultDepth; i > 0; i-- {
-					sw.Do("ptrVar$.ptri$ := &ptrVar$.i$\n", generator.Args{"i": fmt.Sprintf("%d", i), "ptri": fmt.Sprintf("%d", (i - 1))})
-				}
-				sw.Do("$.varName$ = ptrVar0", args)
-			} else {
-				sw.Do("$.varName$ = $.defaultValue$", args)
-			}
+		sw.Do(fmt.Sprintf("if %s == nil {\n", variablePlaceholder), args)
+		// Map values are not directly addressable and we need a temporary variable to do json unmarshalling
+		// This applies to maps with non-primitive values (eg: map[string]SubStruct)
+		if n.key {
+			sw.Do("$.mapDefaultVar$ := $.varName$[$.index$]\n", args)
+			sw.Do("if err := json.Unmarshal([]byte(`$.defaultValue$`), &$.mapDefaultVar$); err != nil {\n", args)
 		} else {
-			sw.Do("if err := json.Unmarshal([]byte(`$.defaultValue$`), $.varPointer$); err != nil {\n", args)
-			sw.Do("panic(err)\n", nil)
-			sw.Do("}\n", nil)
+			variablePointer := variablePlaceholder
+			if !isVarPointer {
+				variablePointer = "&" + variablePointer
+			}
+			sw.Do(fmt.Sprintf("if err := json.Unmarshal([]byte(`$.defaultValue$`), %s); err != nil {\n", variablePointer), args)
+		}
+		sw.Do("panic(err)\n", nil)
+		sw.Do("}\n", nil)
+		if n.key {
+			sw.Do("$.varName$[$.index$] = $.mapDefaultVar$\n", args)
 		}
 	}
 	sw.Do("}\n", nil)
diff --git a/vendor/k8s.io/gengo/parser/parse.go b/vendor/k8s.io/gengo/parser/parse.go
index 14b5ae13479..635afcf282d 100644
--- a/vendor/k8s.io/gengo/parser/parse.go
+++ b/vendor/k8s.io/gengo/parser/parse.go
@@ -493,6 +493,19 @@ func (b *Builder) FindTypes() (types.Universe, error) {
 	return u, nil
 }
 
+// addCommentsToType takes any accumulated comment lines prior to obj and
+// attaches them to the type t.
+func (b *Builder) addCommentsToType(obj tc.Object, t *types.Type) {
+	c1 := b.priorCommentLines(obj.Pos(), 1)
+	// c1.Text() is safe if c1 is nil
+	t.CommentLines = splitLines(c1.Text())
+	if c1 == nil {
+		t.SecondClosestCommentLines = splitLines(b.priorCommentLines(obj.Pos(), 2).Text())
+	} else {
+		t.SecondClosestCommentLines = splitLines(b.priorCommentLines(c1.List[0].Slash, 2).Text())
+	}
+}
+
 // findTypesIn finalizes the package import and searches through the package
 // for types.
 func (b *Builder) findTypesIn(pkgPath importPathString, u *types.Universe) error {
@@ -536,35 +549,23 @@ func (b *Builder) findTypesIn(pkgPath importPathString, u *types.Universe) error
 		tn, ok := obj.(*tc.TypeName)
 		if ok {
 			t := b.walkType(*u, nil, tn.Type())
-			c1 := b.priorCommentLines(obj.Pos(), 1)
-			// c1.Text() is safe if c1 is nil
-			t.CommentLines = splitLines(c1.Text())
-			if c1 == nil {
-				t.SecondClosestCommentLines = splitLines(b.priorCommentLines(obj.Pos(), 2).Text())
-			} else {
-				t.SecondClosestCommentLines = splitLines(b.priorCommentLines(c1.List[0].Slash, 2).Text())
-			}
+			b.addCommentsToType(obj, t)
 		}
 		tf, ok := obj.(*tc.Func)
 		// We only care about functions, not concrete/abstract methods.
 		if ok && tf.Type() != nil && tf.Type().(*tc.Signature).Recv() == nil {
 			t := b.addFunction(*u, nil, tf)
-			c1 := b.priorCommentLines(obj.Pos(), 1)
-			// c1.Text() is safe if c1 is nil
-			t.CommentLines = splitLines(c1.Text())
-			if c1 == nil {
-				t.SecondClosestCommentLines = splitLines(b.priorCommentLines(obj.Pos(), 2).Text())
-			} else {
-				t.SecondClosestCommentLines = splitLines(b.priorCommentLines(c1.List[0].Slash, 2).Text())
-			}
+			b.addCommentsToType(obj, t)
 		}
 		tv, ok := obj.(*tc.Var)
 		if ok && !tv.IsField() {
-			b.addVariable(*u, nil, tv)
+			t := b.addVariable(*u, nil, tv)
+			b.addCommentsToType(obj, t)
 		}
 		tconst, ok := obj.(*tc.Const)
 		if ok {
-			b.addConstant(*u, nil, tconst)
+			t := b.addConstant(*u, nil, tconst)
+			b.addCommentsToType(obj, t)
 		}
 	}
 
diff --git a/vendor/modules.txt b/vendor/modules.txt
index d789fe16f0d..fdb00e50393 100644
--- a/vendor/modules.txt
+++ b/vendor/modules.txt
@@ -2271,9 +2271,9 @@ k8s.io/cri-api/pkg/apis/testing
 k8s.io/csi-translation-lib
 # k8s.io/csi-translation-lib => ./staging/src/k8s.io/csi-translation-lib
 k8s.io/csi-translation-lib/plugins
-# k8s.io/gengo v0.0.0-20201113003025-83324d819ded => k8s.io/gengo v0.0.0-20201113003025-83324d819ded
+# k8s.io/gengo v0.0.0-20201214224949-b6c5ce23f027 => k8s.io/gengo v0.0.0-20201214224949-b6c5ce23f027
 ## explicit
-# k8s.io/gengo => k8s.io/gengo v0.0.0-20201113003025-83324d819ded
+# k8s.io/gengo => k8s.io/gengo v0.0.0-20201214224949-b6c5ce23f027
 k8s.io/gengo/args
 k8s.io/gengo/examples/deepcopy-gen/generators
 k8s.io/gengo/examples/defaulter-gen/generators