[NETFILTER]: constify nf_afinfo

Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

include/linux/netfilter.h

@@ -226,8 +226,8 @@ struct nf_afinfo {
 	int		route_key_size;
 };
 
-extern struct nf_afinfo *nf_afinfo[];
-static inline struct nf_afinfo *nf_get_afinfo(unsigned short family)
+extern const struct nf_afinfo *nf_afinfo[NPROTO];
+static inline const struct nf_afinfo *nf_get_afinfo(unsigned short family)
 {
 	return rcu_dereference(nf_afinfo[family]);
 }
@@ -236,7 +236,7 @@ static inline __sum16
 nf_checksum(struct sk_buff *skb, unsigned int hook, unsigned int dataoff,
 	    u_int8_t protocol, unsigned short family)
 {
-	struct nf_afinfo *afinfo;
+	const struct nf_afinfo *afinfo;
 	__sum16 csum = 0;
 
 	rcu_read_lock();
@@ -247,8 +247,8 @@ nf_checksum(struct sk_buff *skb, unsigned int hook, unsigned int dataoff,
 	return csum;
 }
 
-extern int nf_register_afinfo(struct nf_afinfo *afinfo);
-extern void nf_unregister_afinfo(struct nf_afinfo *afinfo);
+extern int nf_register_afinfo(const struct nf_afinfo *afinfo);
+extern void nf_unregister_afinfo(const struct nf_afinfo *afinfo);
 
 #include <net/flow.h>
 extern void (*ip_nat_decode_session)(struct sk_buff *, struct flowi *);

net/ipv4/netfilter.c

@@ -190,7 +190,7 @@ static int nf_ip_route(struct dst_entry **dst, struct flowi *fl)
 	return ip_route_output_key((struct rtable **)dst, fl);
 }
 
-static struct nf_afinfo nf_ip_afinfo = {
+static const struct nf_afinfo nf_ip_afinfo = {
 	.family		= AF_INET,
 	.checksum	= nf_ip_checksum,
 	.route		= nf_ip_route,

net/ipv6/netfilter.c

@@ -124,7 +124,7 @@ __sum16 nf_ip6_checksum(struct sk_buff *skb, unsigned int hook,
 
 EXPORT_SYMBOL(nf_ip6_checksum);
 
-static struct nf_afinfo nf_ip6_afinfo = {
+static const struct nf_afinfo nf_ip6_afinfo = {
 	.family		= AF_INET6,
 	.checksum	= nf_ip6_checksum,
 	.route		= nf_ip6_route,

net/netfilter/core.c

@@ -26,10 +26,10 @@
 
 static DEFINE_MUTEX(afinfo_mutex);
 
-struct nf_afinfo *nf_afinfo[NPROTO] __read_mostly;
+const struct nf_afinfo *nf_afinfo[NPROTO] __read_mostly;
 EXPORT_SYMBOL(nf_afinfo);
 
-int nf_register_afinfo(struct nf_afinfo *afinfo)
+int nf_register_afinfo(const struct nf_afinfo *afinfo)
 {
 	int err;
 
@@ -42,7 +42,7 @@ int nf_register_afinfo(struct nf_afinfo *afinfo)
 }
 EXPORT_SYMBOL_GPL(nf_register_afinfo);
 
-void nf_unregister_afinfo(struct nf_afinfo *afinfo)
+void nf_unregister_afinfo(const struct nf_afinfo *afinfo)
 {
 	mutex_lock(&afinfo_mutex);
 	rcu_assign_pointer(nf_afinfo[afinfo->family], NULL);

net/netfilter/nf_conntrack_h323_main.c

@@ -708,7 +708,7 @@ static int callforward_do_filter(union nf_conntrack_address *src,
 				 union nf_conntrack_address *dst,
 				 int family)
 {
-	struct nf_afinfo *afinfo;
+	const struct nf_afinfo *afinfo;
 	struct flowi fl1, fl2;
 	int ret = 0;
 

net/netfilter/nf_queue.c

@@ -119,7 +119,7 @@ static int __nf_queue(struct sk_buff *skb,
 	struct net_device *physindev;
 	struct net_device *physoutdev;
 #endif
-	struct nf_afinfo *afinfo;
+	const struct nf_afinfo *afinfo;
 	const struct nf_queue_handler *qh;
 
 	/* QUEUE == DROP if noone is waiting, to be safe. */
@@ -233,7 +233,7 @@ void nf_reinject(struct nf_queue_entry *entry, unsigned int verdict)
 {
 	struct sk_buff *skb = entry->skb;
 	struct list_head *elem = &entry->elem->list;
-	struct nf_afinfo *afinfo;
+	const struct nf_afinfo *afinfo;
 
 	rcu_read_lock();