diff --git a/include/net/protocol.h b/include/net/protocol.h
index cea2aee92ac53c233a24e7e941981e55e77330ee..60249e51b6691354f70e5ffe00137f39c7371a4e 100644
--- a/include/net/protocol.h
+++ b/include/net/protocol.h
@@ -97,7 +97,7 @@ struct inet_protosw {
 extern const struct net_protocol *inet_protos[MAX_INET_PROTOS];
 
 #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
-extern struct inet6_protocol *inet6_protos[MAX_INET_PROTOS];
+extern const struct inet6_protocol *inet6_protos[MAX_INET_PROTOS];
 #endif
 
 extern int	inet_add_protocol(const struct net_protocol *prot, unsigned char num);
@@ -106,8 +106,8 @@ extern void	inet_register_protosw(struct inet_protosw *p);
 extern void	inet_unregister_protosw(struct inet_protosw *p);
 
 #if defined(CONFIG_IPV6) || defined (CONFIG_IPV6_MODULE)
-extern int	inet6_add_protocol(struct inet6_protocol *prot, unsigned char num);
-extern int	inet6_del_protocol(struct inet6_protocol *prot, unsigned char num);
+extern int	inet6_add_protocol(const struct inet6_protocol *prot, unsigned char num);
+extern int	inet6_del_protocol(const struct inet6_protocol *prot, unsigned char num);
 extern int	inet6_register_protosw(struct inet_protosw *p);
 extern void	inet6_unregister_protosw(struct inet_protosw *p);
 #endif
diff --git a/net/dccp/ipv6.c b/net/dccp/ipv6.c
index 64f011cc44916f99f37f9ab8279f055870d19b3a..364bfc76c29eb78c9ae08ced56aa1436c414a685 100644
--- a/net/dccp/ipv6.c
+++ b/net/dccp/ipv6.c
@@ -1152,7 +1152,7 @@ static struct proto dccp_v6_prot = {
 #endif
 };
 
-static struct inet6_protocol dccp_v6_protocol = {
+static const struct inet6_protocol dccp_v6_protocol = {
 	.handler	= dccp_v6_rcv,
 	.err_handler	= dccp_v6_err,
 	.flags		= INET6_PROTO_NOPOLICY | INET6_PROTO_FINAL,
diff --git a/net/ipv6/af_inet6.c b/net/ipv6/af_inet6.c
index a123a328aeb317e3ab0cfa5c4906f3240105a5eb..e127a32f9540fecfaee5de6332ca1be64ce6541f 100644
--- a/net/ipv6/af_inet6.c
+++ b/net/ipv6/af_inet6.c
@@ -710,7 +710,7 @@ EXPORT_SYMBOL_GPL(ipv6_opt_accepted);
 
 static int ipv6_gso_pull_exthdrs(struct sk_buff *skb, int proto)
 {
-	struct inet6_protocol *ops = NULL;
+	const struct inet6_protocol *ops = NULL;
 
 	for (;;) {
 		struct ipv6_opt_hdr *opth;
@@ -745,7 +745,7 @@ static int ipv6_gso_pull_exthdrs(struct sk_buff *skb, int proto)
 static int ipv6_gso_send_check(struct sk_buff *skb)
 {
 	struct ipv6hdr *ipv6h;
-	struct inet6_protocol *ops;
+	const struct inet6_protocol *ops;
 	int err = -EINVAL;
 
 	if (unlikely(!pskb_may_pull(skb, sizeof(*ipv6h))))
@@ -773,7 +773,7 @@ static struct sk_buff *ipv6_gso_segment(struct sk_buff *skb, int features)
 {
 	struct sk_buff *segs = ERR_PTR(-EINVAL);
 	struct ipv6hdr *ipv6h;
-	struct inet6_protocol *ops;
+	const struct inet6_protocol *ops;
 	int proto;
 	struct frag_hdr *fptr;
 	unsigned int unfrag_ip6hlen;
@@ -840,7 +840,7 @@ struct ipv6_gro_cb {
 static struct sk_buff **ipv6_gro_receive(struct sk_buff **head,
 					 struct sk_buff *skb)
 {
-	struct inet6_protocol *ops;
+	const struct inet6_protocol *ops;
 	struct sk_buff **pp = NULL;
 	struct sk_buff *p;
 	struct ipv6hdr *iph;
@@ -926,7 +926,7 @@ static struct sk_buff **ipv6_gro_receive(struct sk_buff **head,
 
 static int ipv6_gro_complete(struct sk_buff *skb)
 {
-	struct inet6_protocol *ops;
+	const struct inet6_protocol *ops;
 	struct ipv6hdr *iph = ipv6_hdr(skb);
 	int err = -ENOSYS;
 
diff --git a/net/ipv6/ah6.c b/net/ipv6/ah6.c
index 86f42a288c4bb487237ffa6da9944e20d0456efb..c1589e2f1dc9f57d975b94a4a086121ff6bdac92 100644
--- a/net/ipv6/ah6.c
+++ b/net/ipv6/ah6.c
@@ -527,7 +527,7 @@ static const struct xfrm_type ah6_type =
 	.hdr_offset	= xfrm6_find_1stfragopt,
 };
 
-static struct inet6_protocol ah6_protocol = {
+static const struct inet6_protocol ah6_protocol = {
 	.handler	=	xfrm6_rcv,
 	.err_handler	=	ah6_err,
 	.flags		=	INET6_PROTO_NOPOLICY,
diff --git a/net/ipv6/esp6.c b/net/ipv6/esp6.c
index 678bb95b1525716f2120db6abe3332a7c4e5edab..af597c73ebe9b6bc53f5ae0eb4c91a268a66e47d 100644
--- a/net/ipv6/esp6.c
+++ b/net/ipv6/esp6.c
@@ -558,7 +558,7 @@ static const struct xfrm_type esp6_type =
 	.hdr_offset	= xfrm6_find_1stfragopt,
 };
 
-static struct inet6_protocol esp6_protocol = {
+static const struct inet6_protocol esp6_protocol = {
 	.handler 	=	xfrm6_rcv,
 	.err_handler	=	esp6_err,
 	.flags		=	INET6_PROTO_NOPOLICY,
diff --git a/net/ipv6/exthdrs.c b/net/ipv6/exthdrs.c
index 4aae658e55016999c25640c41d2624eb49884903..df159fffe4bca2c373bb1d78bf03959244019bd2 100644
--- a/net/ipv6/exthdrs.c
+++ b/net/ipv6/exthdrs.c
@@ -500,17 +500,17 @@ static int ipv6_rthdr_rcv(struct sk_buff *skb)
 	return -1;
 }
 
-static struct inet6_protocol rthdr_protocol = {
+static const struct inet6_protocol rthdr_protocol = {
 	.handler	=	ipv6_rthdr_rcv,
 	.flags		=	INET6_PROTO_NOPOLICY | INET6_PROTO_GSO_EXTHDR,
 };
 
-static struct inet6_protocol destopt_protocol = {
+static const struct inet6_protocol destopt_protocol = {
 	.handler	=	ipv6_destopt_rcv,
 	.flags		=	INET6_PROTO_NOPOLICY | INET6_PROTO_GSO_EXTHDR,
 };
 
-static struct inet6_protocol nodata_protocol = {
+static const struct inet6_protocol nodata_protocol = {
 	.handler	=	dst_discard,
 	.flags		=	INET6_PROTO_NOPOLICY,
 };
diff --git a/net/ipv6/icmp.c b/net/ipv6/icmp.c
index e2325f6a05fbd4e9a0d154ca5ddcf6386296760e..f23ebbec0631792407f6ea82827a572027050401 100644
--- a/net/ipv6/icmp.c
+++ b/net/ipv6/icmp.c
@@ -86,7 +86,7 @@ static inline struct sock *icmpv6_sk(struct net *net)
 
 static int icmpv6_rcv(struct sk_buff *skb);
 
-static struct inet6_protocol icmpv6_protocol = {
+static const struct inet6_protocol icmpv6_protocol = {
 	.handler	=	icmpv6_rcv,
 	.flags		=	INET6_PROTO_NOPOLICY|INET6_PROTO_FINAL,
 };
@@ -583,7 +583,7 @@ static void icmpv6_echo_reply(struct sk_buff *skb)
 
 static void icmpv6_notify(struct sk_buff *skb, u8 type, u8 code, __be32 info)
 {
-	struct inet6_protocol *ipprot;
+	const struct inet6_protocol *ipprot;
 	int inner_offset;
 	int hash;
 	u8 nexthdr;
diff --git a/net/ipv6/ip6_input.c b/net/ipv6/ip6_input.c
index 2d9cbaa67edb7232f6c992e66b8ece1d6d6bafd7..237e2dba6e944772e27e908188d7531e03744b7d 100644
--- a/net/ipv6/ip6_input.c
+++ b/net/ipv6/ip6_input.c
@@ -159,7 +159,7 @@ int ipv6_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt
 
 static int ip6_input_finish(struct sk_buff *skb)
 {
-	struct inet6_protocol *ipprot;
+	const struct inet6_protocol *ipprot;
 	unsigned int nhoff;
 	int nexthdr, raw;
 	u8 hash;
diff --git a/net/ipv6/ip6mr.c b/net/ipv6/ip6mr.c
index 5c8d73730c75d68dcdb050a5607fa073e1e7e40b..3907510c2ce3e17f21fa9b2d5f151d18edb28f6e 100644
--- a/net/ipv6/ip6mr.c
+++ b/net/ipv6/ip6mr.c
@@ -83,10 +83,6 @@ static int ip6mr_cache_report(struct net *net, struct sk_buff *pkt,
 static int ip6mr_fill_mroute(struct sk_buff *skb, struct mfc6_cache *c, struct rtmsg *rtm);
 static void mroute_clean_tables(struct net *net);
 
-#ifdef CONFIG_IPV6_PIMSM_V2
-static struct inet6_protocol pim6_protocol;
-#endif
-
 static struct timer_list ipmr_expire_timer;
 
 
@@ -410,7 +406,7 @@ static int pim6_rcv(struct sk_buff *skb)
 	return 0;
 }
 
-static struct inet6_protocol pim6_protocol = {
+static const struct inet6_protocol pim6_protocol = {
 	.handler	=	pim6_rcv,
 };
 
diff --git a/net/ipv6/ipcomp6.c b/net/ipv6/ipcomp6.c
index 79c172f1ff012d6b7f577ea20febae037ec96dad..2f2a5ca2c8786599560f7328d64401f837ab5e38 100644
--- a/net/ipv6/ipcomp6.c
+++ b/net/ipv6/ipcomp6.c
@@ -178,7 +178,7 @@ static const struct xfrm_type ipcomp6_type =
 	.hdr_offset	= xfrm6_find_1stfragopt,
 };
 
-static struct inet6_protocol ipcomp6_protocol =
+static const struct inet6_protocol ipcomp6_protocol =
 {
 	.handler	= xfrm6_rcv,
 	.err_handler	= ipcomp6_err,
diff --git a/net/ipv6/protocol.c b/net/ipv6/protocol.c
index 568864f722ca5cb92a704c836463572dceaa4b32..1fa3468f0f323782413c1931258c61aa9130f450 100644
--- a/net/ipv6/protocol.c
+++ b/net/ipv6/protocol.c
@@ -25,11 +25,11 @@
 #include <linux/spinlock.h>
 #include <net/protocol.h>
 
-struct inet6_protocol *inet6_protos[MAX_INET_PROTOS];
+const struct inet6_protocol *inet6_protos[MAX_INET_PROTOS];
 static DEFINE_SPINLOCK(inet6_proto_lock);
 
 
-int inet6_add_protocol(struct inet6_protocol *prot, unsigned char protocol)
+int inet6_add_protocol(const struct inet6_protocol *prot, unsigned char protocol)
 {
 	int ret, hash = protocol & (MAX_INET_PROTOS - 1);
 
@@ -53,7 +53,7 @@ EXPORT_SYMBOL(inet6_add_protocol);
  *	Remove a protocol from the hash tables.
  */
 
-int inet6_del_protocol(struct inet6_protocol *prot, unsigned char protocol)
+int inet6_del_protocol(const struct inet6_protocol *prot, unsigned char protocol)
 {
 	int ret, hash = protocol & (MAX_INET_PROTOS - 1);
 
diff --git a/net/ipv6/reassembly.c b/net/ipv6/reassembly.c
index 2642a41a853518bc6405f6934554bdbaad58c875..da5bd0ed83df251a4a5340f382fc1639c2fa9a72 100644
--- a/net/ipv6/reassembly.c
+++ b/net/ipv6/reassembly.c
@@ -627,7 +627,7 @@ static int ipv6_frag_rcv(struct sk_buff *skb)
 	return -1;
 }
 
-static struct inet6_protocol frag_protocol =
+static const struct inet6_protocol frag_protocol =
 {
 	.handler	=	ipv6_frag_rcv,
 	.flags		=	INET6_PROTO_NOPOLICY,
diff --git a/net/ipv6/tcp_ipv6.c b/net/ipv6/tcp_ipv6.c
index 3aae0f217d611234a9673ea0fcc7671e46ec6aeb..7718a9261efbf8845911b57eda0c1bbaac1f86a7 100644
--- a/net/ipv6/tcp_ipv6.c
+++ b/net/ipv6/tcp_ipv6.c
@@ -2093,7 +2093,7 @@ struct proto tcpv6_prot = {
 #endif
 };
 
-static struct inet6_protocol tcpv6_protocol = {
+static const struct inet6_protocol tcpv6_protocol = {
 	.handler	=	tcp_v6_rcv,
 	.err_handler	=	tcp_v6_err,
 	.gso_send_check	=	tcp_v6_gso_send_check,
diff --git a/net/ipv6/tunnel6.c b/net/ipv6/tunnel6.c
index 633ad789effc12d0000c9ec3bb2c76192bfcee6e..51e2832d13a661ee862b0ec0cd2e200bc2f5c7dd 100644
--- a/net/ipv6/tunnel6.c
+++ b/net/ipv6/tunnel6.c
@@ -133,13 +133,13 @@ static void tunnel6_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
 			break;
 }
 
-static struct inet6_protocol tunnel6_protocol = {
+static const struct inet6_protocol tunnel6_protocol = {
 	.handler	= tunnel6_rcv,
 	.err_handler	= tunnel6_err,
 	.flags          = INET6_PROTO_NOPOLICY|INET6_PROTO_FINAL,
 };
 
-static struct inet6_protocol tunnel46_protocol = {
+static const struct inet6_protocol tunnel46_protocol = {
 	.handler	= tunnel46_rcv,
 	.err_handler	= tunnel6_err,
 	.flags          = INET6_PROTO_NOPOLICY|INET6_PROTO_FINAL,
diff --git a/net/ipv6/udp.c b/net/ipv6/udp.c
index 164040613c2e996760ba756e5db89dd0e4f912a5..b265b7047d3e3b9795c348c92306c3b2b2970255 100644
--- a/net/ipv6/udp.c
+++ b/net/ipv6/udp.c
@@ -1172,7 +1172,7 @@ static struct sk_buff *udp6_ufo_fragment(struct sk_buff *skb, int features)
 	return segs;
 }
 
-static struct inet6_protocol udpv6_protocol = {
+static const struct inet6_protocol udpv6_protocol = {
 	.handler	=	udpv6_rcv,
 	.err_handler	=	udpv6_err,
 	.gso_send_check =	udp6_ufo_send_check,
diff --git a/net/ipv6/udplite.c b/net/ipv6/udplite.c
index 4818c48688f210b31932329204b9c47159c5e44c..d737a27ee010e13e397605154654b3a68dd304c9 100644
--- a/net/ipv6/udplite.c
+++ b/net/ipv6/udplite.c
@@ -25,7 +25,7 @@ static void udplitev6_err(struct sk_buff *skb,
 	__udp6_lib_err(skb, opt, type, code, offset, info, &udplite_table);
 }
 
-static struct inet6_protocol udplitev6_protocol = {
+static const struct inet6_protocol udplitev6_protocol = {
 	.handler	=	udplitev6_rcv,
 	.err_handler	=	udplitev6_err,
 	.flags		=	INET6_PROTO_NOPOLICY|INET6_PROTO_FINAL,
diff --git a/net/sctp/ipv6.c b/net/sctp/ipv6.c
index 6a4b19094143653ab79a43de52d916fd8ed2a0f0..bb280e60e00a9f23c93ae1047ef1934af62ad81c 100644
--- a/net/sctp/ipv6.c
+++ b/net/sctp/ipv6.c
@@ -949,7 +949,7 @@ static int sctp6_rcv(struct sk_buff *skb)
 	return sctp_rcv(skb) ? -1 : 0;
 }
 
-static struct inet6_protocol sctpv6_protocol = {
+static const struct inet6_protocol sctpv6_protocol = {
 	.handler      = sctp6_rcv,
 	.err_handler  = sctp_v6_err,
 	.flags        = INET6_PROTO_NOPOLICY | INET6_PROTO_FINAL,