"Fix build failures observed so far" - take three.

Author: angus19

nat46/modules/nat46-netdev.c

@@ -120,8 +120,10 @@ static void nat46_netdev_setup(struct net_device *dev)
 	dev->mtu = 16384; /* iptables does reassembly. Rather than using ETH_DATA_LEN, let's try to get as much mileage as we can with the Linux stack */
 #if LINUX_VERSION_CODE < KERNEL_VERSION(6,12,0)
 	dev->features = NETIF_F_NETNS_LOCAL;
-#else
+#elif LINUX_VERSION_CODE < KERNEL_VERSION(6,15,0)
 	dev->netns_local = true;
+#else
+	dev->netns_immutable = true;
 #endif
 	dev->flags = IFF_NOARP | IFF_POINTOPOINT;
 }