--- zzzz-none-000/linux-4.4.271/net/packet/internal.h	2021-06-03 06:22:09.000000000 +0000
+++ hawkeye-5590-750/linux-4.4.271/net/packet/internal.h	2023-04-19 10:22:30.000000000 +0000
@@ -1,6 +1,8 @@
 #ifndef __PACKET_INTERNAL_H__
 #define __PACKET_INTERNAL_H__
 
+#include <linux/refcount.h>
+
 struct packet_mclist {
 	struct packet_mclist	*next;
 	int			ifindex;
@@ -86,7 +88,7 @@
 	struct list_head	list;
 	struct sock		*arr[PACKET_FANOUT_MAX];
 	spinlock_t		lock;
-	atomic_t		sk_ref;
+	refcount_t		sk_ref;
 	struct packet_type	prot_hook ____cacheline_aligned_in_smp;
 };
 
@@ -128,6 +130,7 @@
 	struct net_device __rcu	*cached_dev;
 	int			(*xmit)(struct sk_buff *skb);
 	struct packet_type	prot_hook ____cacheline_aligned_in_smp;
+	unsigned int		pkt_type;
 };
 
 static struct packet_sock *pkt_sk(struct sock *sk)