fix golint

cmd/kube-proxy/app/server.go

@@ -236,10 +236,7 @@ func (o *Options) Complete() error {
 		return err
 	}
 
-	if err := utilfeature.DefaultMutableFeatureGate.SetFromMap(o.config.FeatureGates); err != nil {
-		return err
-	}
-	return nil
+	return utilfeature.DefaultMutableFeatureGate.SetFromMap(o.config.FeatureGates)
 }
 
 // Creates a new filesystem watcher and adds watches for the config file.

pkg/proxy/endpoints.go

@@ -282,7 +282,7 @@ func (ect *EndpointChangeTracker) endpointsToEndpointsMap(endpoints *v1.Endpoint
 // The changes map is cleared after applying them.
 // In addition it returns (via argument) and resets the lastChangeTriggerTimes for all endpoints
 // that were changed and will result in syncing the proxy rules.
-func (endpointsMap EndpointsMap) apply(changes *EndpointChangeTracker, staleEndpoints *[]ServiceEndpoint,
+func (em EndpointsMap) apply(changes *EndpointChangeTracker, staleEndpoints *[]ServiceEndpoint,
 	staleServiceNames *[]ServicePortName, lastChangeTriggerTimes *[]time.Time) {
 	if changes == nil {
 		return
@@ -290,8 +290,8 @@ func (endpointsMap EndpointsMap) apply(changes *EndpointChangeTracker, staleEndp
 	changes.lock.Lock()
 	defer changes.lock.Unlock()
 	for _, change := range changes.items {
-		endpointsMap.Unmerge(change.previous)
-		endpointsMap.Merge(change.current)
+		em.Unmerge(change.previous)
+		em.Merge(change.current)
 		detectStaleConnections(change.previous, change.current, staleEndpoints, staleServiceNames)
 	}
 	changes.items = make(map[types.NamespacedName]*endpointsChange)

pkg/proxy/service.go

@@ -284,15 +284,15 @@ func (sct *ServiceChangeTracker) serviceToServiceMap(service *v1.Service) Servic
 
 // apply the changes to ServiceMap and update the stale udp cluster IP set. The UDPStaleClusterIP argument is passed in to store the
 // udp protocol service cluster ip when service is deleted from the ServiceMap.
-func (serviceMap *ServiceMap) apply(changes *ServiceChangeTracker, UDPStaleClusterIP sets.String) {
+func (sm *ServiceMap) apply(changes *ServiceChangeTracker, UDPStaleClusterIP sets.String) {
 	changes.lock.Lock()
 	defer changes.lock.Unlock()
 	for _, change := range changes.items {
-		serviceMap.merge(change.current)
+		sm.merge(change.current)
 		// filter out the Update event of current changes from previous changes before calling unmerge() so that can
 		// skip deleting the Update events.
 		change.previous.filter(change.current)
-		serviceMap.unmerge(change.previous, UDPStaleClusterIP)
+		sm.unmerge(change.previous, UDPStaleClusterIP)
 	}
 	// clear changes after applying them to ServiceMap.
 	changes.items = make(map[types.NamespacedName]*serviceChange)

pkg/proxy/util/network.go

@@ -33,12 +33,12 @@ type NetworkInterfacer interface {
 type RealNetwork struct{}
 
 // Addrs wraps net.Interface.Addrs(), it's a part of NetworkInterfacer interface.
-func (_ RealNetwork) Addrs(intf *net.Interface) ([]net.Addr, error) {
+func (RealNetwork) Addrs(intf *net.Interface) ([]net.Addr, error) {
 	return intf.Addrs()
 }
 
 // Interfaces wraps net.Interfaces(), it's a part of NetworkInterfacer interface.
-func (_ RealNetwork) Interfaces() ([]net.Interface, error) {
+func (RealNetwork) Interfaces() ([]net.Interface, error) {
 	return net.Interfaces()
 }