Update Linux to v5.4.2

Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/include/net/geneve.h b/include/net/geneve.h
index a7600ed..bced0b1 100644
--- a/include/net/geneve.h
+++ b/include/net/geneve.h
@@ -4,6 +4,8 @@
 
 #include <net/udp_tunnel.h>
 
+#define GENEVE_UDP_PORT		6081
+
 /* Geneve Header:
  *  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
  *  |Ver|  Opt Len  |O|C|    Rsvd.  |          Protocol Type        |
@@ -60,6 +62,12 @@
 	struct geneve_opt options[];
 };
 
+static inline bool netif_is_geneve(const struct net_device *dev)
+{
+	return dev->rtnl_link_ops &&
+	       !strcmp(dev->rtnl_link_ops->kind, "geneve");
+}
+
 #ifdef CONFIG_INET
 struct net_device *geneve_dev_create_fb(struct net *net, const char *name,
 					u8 name_assign_type, u16 dst_port);