--- zzzz-none-000/linux-4.4.271/include/net/ipv6.h	2021-06-03 06:22:09.000000000 +0000
+++ hawkeye-5590-750/linux-4.4.271/include/net/ipv6.h	2023-04-19 10:22:30.000000000 +0000
@@ -107,7 +107,7 @@
 	__u8	reserved;
 	__be16	frag_off;
 	__be32	identification;
-};
+} __attribute__((packed, aligned(2)));
 
 #define	IP6_MF		0x0001
 #define	IP6_OFFSET	0xFFF8
@@ -411,8 +411,8 @@
 	}
 #endif
 #endif
-	addr[0] = wh;
-	addr[1] = wl;
+	net_hdr_word(&addr[0]) = wh;
+	net_hdr_word(&addr[1]) = wl;
 }
 
 static inline void ipv6_addr_set(struct in6_addr *addr, 
@@ -471,6 +471,8 @@
 	const __be32 *a1 = addr1->s6_addr32;
 	const __be32 *a2 = addr2->s6_addr32;
 	unsigned int pdw, pbi;
+	/* Used for last <32-bit fraction of prefix */
+	u32 pbia1, pbia2;
 
 	/* check complete u32 in prefix */
 	pdw = prefixlen >> 5;
@@ -479,7 +481,9 @@
 
 	/* check incomplete u32 in prefix */
 	pbi = prefixlen & 0x1f;
-	if (pbi && ((a1[pdw] ^ a2[pdw]) & htonl((0xffffffff) << (32 - pbi))))
+	pbia1 = net_hdr_word(&a1[pdw]);
+	pbia2 = net_hdr_word(&a2[pdw]);
+	if (pbi && ((pbia1 ^ pbia2) & htonl((0xffffffff) << (32 - pbi))))
 		return false;
 
 	return true;
@@ -608,13 +612,13 @@
  */
 static inline int __ipv6_addr_diff32(const void *token1, const void *token2, int addrlen)
 {
-	const __be32 *a1 = token1, *a2 = token2;
+	const struct in6_addr *a1 = token1, *a2 = token2;
 	int i;
 
 	addrlen >>= 2;
 
 	for (i = 0; i < addrlen; i++) {
-		__be32 xb = a1[i] ^ a2[i];
+		__be32 xb = a1->s6_addr32[i] ^ a2->s6_addr32[i];
 		if (xb)
 			return i * 32 + 31 - __fls(ntohl(xb));
 	}
@@ -783,17 +787,18 @@
 static inline void ip6_flow_hdr(struct ipv6hdr *hdr, unsigned int tclass,
 				__be32 flowlabel)
 {
-	*(__be32 *)hdr = htonl(0x60000000 | (tclass << 20)) | flowlabel;
+	net_hdr_word((__be32 *)hdr) =
+		htonl(0x60000000 | (tclass << 20)) | flowlabel;
 }
 
 static inline __be32 ip6_flowinfo(const struct ipv6hdr *hdr)
 {
-	return *(__be32 *)hdr & IPV6_FLOWINFO_MASK;
+	return net_hdr_word((__be32 *)hdr) & IPV6_FLOWINFO_MASK;
 }
 
 static inline __be32 ip6_flowlabel(const struct ipv6hdr *hdr)
 {
-	return *(__be32 *)hdr & IPV6_FLOWLABEL_MASK;
+	return net_hdr_word((__be32 *)hdr) & IPV6_FLOWLABEL_MASK;
 }
 
 static inline u8 ip6_tclass(__be32 flowinfo)
@@ -821,6 +826,7 @@
 
 int ip6_find_1stfragopt(struct sk_buff *skb, u8 **nexthdr);
 
+void ip6_input_init(void);
 int ip6_append_data(struct sock *sk,
 		    int getfrag(void *from, char *to, int offset, int len,
 				int odd, struct sk_buff *skb),