Update Linux to v5.4.2

Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/net/packet/internal.h b/net/packet/internal.h
index 3bb7c5f..82fb2b1 100644
--- a/net/packet/internal.h
+++ b/net/packet/internal.h
@@ -128,9 +128,11 @@
 	unsigned int		tp_hdrlen;
 	unsigned int		tp_reserve;
 	unsigned int		tp_tstamp;
+	struct completion	skb_completion;
 	struct net_device __rcu	*cached_dev;
 	int			(*xmit)(struct sk_buff *skb);
 	struct packet_type	prot_hook ____cacheline_aligned_in_smp;
+	atomic_t		tp_drops ____cacheline_aligned_in_smp;
 };
 
 static struct packet_sock *pkt_sk(struct sock *sk)