ax25: constify dev_addr passing

In preparation for netdev->dev_addr being constant
make all relevant arguments in AX25 constant.

Modify callers as well (netrom, rose).

Signed-off-by: Jakub Kicinski <[e-mail]>

include/net/ax25.h

···
 void ax25_cb_add(ax25_cb *);
 struct sock *ax25_find_listener(ax25_address *, int, struct net_device *, int);
 struct sock *ax25_get_socket(ax25_address *, ax25_address *, int);
-ax25_cb *ax25_find_cb(ax25_address *, ax25_address *, ax25_digi *,
+ax25_cb *ax25_find_cb(const ax25_address *, ax25_address *, ax25_digi *,
 		      struct net_device *);
 void ax25_send_to_raw(ax25_address *, struct sk_buff *, int);
 void ax25_destroy_socket(ax25_cb *);
···
 
 void ax25_linkfail_register(struct ax25_linkfail *lf);
 void ax25_linkfail_release(struct ax25_linkfail *lf);
-int __must_check ax25_listen_register(ax25_address *, struct net_device *);
-void ax25_listen_release(ax25_address *, struct net_device *);
+int __must_check ax25_listen_register(const ax25_address *,
+				      struct net_device *);
+void ax25_listen_release(const ax25_address *, struct net_device *);
 int(*ax25_protocol_function(unsigned int))(struct sk_buff *, ax25_cb *);
-int ax25_listen_mine(ax25_address *, struct net_device *);
+int ax25_listen_mine(const ax25_address *, struct net_device *);
 void ax25_link_failed(ax25_cb *, int);
 int ax25_protocol_is_registered(unsigned int);
 
···
 extern const struct header_ops ax25_header_ops;
 
 /* ax25_out.c */
-ax25_cb *ax25_send_frame(struct sk_buff *, int, ax25_address *, ax25_address *,
-			 ax25_digi *, struct net_device *);
+ax25_cb *ax25_send_frame(struct sk_buff *, int, const ax25_address *,
+			 ax25_address *, ax25_digi *, struct net_device *);
 void ax25_output(ax25_cb *, int, struct sk_buff *);
 void ax25_kick(ax25_cb *);
 void ax25_transmit_buffer(ax25_cb *, struct sk_buff *, int);

net/ax25/af_ax25.c

···
  *	Find an AX.25 control block given both ends. It will only pick up
  *	floating AX.25 control blocks or non Raw socket bound control blocks.
  */
-ax25_cb *ax25_find_cb(ax25_address *src_addr, ax25_address *dest_addr,
+ax25_cb *ax25_find_cb(const ax25_address *src_addr, ax25_address *dest_addr,
 	ax25_digi *digi, struct net_device *dev)
 {
 	ax25_cb *s;

net/ax25/ax25_dev.c

···
 
 	spin_lock_bh(&ax25_dev_lock);
 	for (ax25_dev = ax25_dev_list; ax25_dev != NULL; ax25_dev = ax25_dev->next)
-		if (ax25cmp(addr, (ax25_address *)ax25_dev->dev->dev_addr) == 0) {
+		if (ax25cmp(addr, (const ax25_address *)ax25_dev->dev->dev_addr) == 0) {
 			res = ax25_dev;
 		}
 	spin_unlock_bh(&ax25_dev_lock);

net/ax25/ax25_iface.c

···
 
 EXPORT_SYMBOL(ax25_linkfail_release);
 
-int ax25_listen_register(ax25_address *callsign, struct net_device *dev)
+int ax25_listen_register(const ax25_address *callsign, struct net_device *dev)
 {
 	struct listen_struct *listen;
 
···
 
 EXPORT_SYMBOL(ax25_listen_register);
 
-void ax25_listen_release(ax25_address *callsign, struct net_device *dev)
+void ax25_listen_release(const ax25_address *callsign, struct net_device *dev)
 {
 	struct listen_struct *s, *listen;
 
···
 	return res;
 }
 
-int ax25_listen_mine(ax25_address *callsign, struct net_device *dev)
+int ax25_listen_mine(const ax25_address *callsign, struct net_device *dev)
 {
 	struct listen_struct *listen;
 

net/ax25/ax25_in.c

···
 }
 
 static int ax25_rcv(struct sk_buff *skb, struct net_device *dev,
-	ax25_address *dev_addr, struct packet_type *ptype)
+		    const ax25_address *dev_addr, struct packet_type *ptype)
 {
 	ax25_address src, dest, *next_digi = NULL;
 	int type = 0, mine = 0, dama;
···
 
 	skb_pull(skb, AX25_KISS_HEADER_LEN);	/* Remove the KISS byte */
 
-	return ax25_rcv(skb, dev, (ax25_address *)dev->dev_addr, ptype);
+	return ax25_rcv(skb, dev, (const ax25_address *)dev->dev_addr, ptype);
 }

net/ax25/ax25_out.c

···
 
 static DEFINE_SPINLOCK(ax25_frag_lock);
 
-ax25_cb *ax25_send_frame(struct sk_buff *skb, int paclen, ax25_address *src, ax25_address *dest, ax25_digi *digi, struct net_device *dev)
+ax25_cb *ax25_send_frame(struct sk_buff *skb, int paclen, const ax25_address *src, ax25_address *dest, ax25_digi *digi, struct net_device *dev)
 {
 	ax25_dev *ax25_dev;
 	ax25_cb *ax25;

net/netrom/af_netrom.c

···
 	struct sock *sk = sock->sk;
 	struct nr_sock *nr = nr_sk(sk);
 	struct sockaddr_ax25 *addr = (struct sockaddr_ax25 *)uaddr;
-	ax25_address *source = NULL;
+	const ax25_address *source = NULL;
 	ax25_uid_assoc *user;
 	struct net_device *dev;
 	int err = 0;
···
 			err = -ENETUNREACH;
 			goto out_release;
 		}
-		source = (ax25_address *)dev->dev_addr;
+		source = (const ax25_address *)dev->dev_addr;
 
 		user = ax25_findbyuid(current_euid());
 		if (user) {

net/netrom/nr_dev.c

···
 		if (err)
 			return err;
 
-		ax25_listen_release((ax25_address *)dev->dev_addr, NULL);
+		ax25_listen_release((const ax25_address *)dev->dev_addr, NULL);
 	}
 
 	dev_addr_set(dev, sa->sa_data);
···
 {
 	int err;
 
-	err = ax25_listen_register((ax25_address *)dev->dev_addr, NULL);
+	err = ax25_listen_register((const ax25_address *)dev->dev_addr, NULL);
 	if (err)
 		return err;
 
···
 
 static int nr_close(struct net_device *dev)
 {
-	ax25_listen_release((ax25_address *)dev->dev_addr, NULL);
+	ax25_listen_release((const ax25_address *)dev->dev_addr, NULL);
 	netif_stop_queue(dev);
 	return 0;
 }

net/netrom/nr_route.c

···
 	rcu_read_lock();
 	for_each_netdev_rcu(&init_net, dev) {
 		if ((dev->flags & IFF_UP) && dev->type == ARPHRD_NETROM &&
-		    ax25cmp(addr, (ax25_address *)dev->dev_addr) == 0) {
+		    ax25cmp(addr, (const ax25_address *)dev->dev_addr) == 0) {
 			dev_hold(dev);
 			goto out;
 		}
···
 
 	ax25s = nr_neigh->ax25;
 	nr_neigh->ax25 = ax25_send_frame(skb, 256,
-					 (ax25_address *)dev->dev_addr,
+					 (const ax25_address *)dev->dev_addr,
 					 &nr_neigh->callsign,
 					 nr_neigh->digipeat, nr_neigh->dev);
 	if (ax25s)

net/rose/rose_link.c

···
  */
 static int rose_send_frame(struct sk_buff *skb, struct rose_neigh *neigh)
 {
-	ax25_address *rose_call;
+	const ax25_address *rose_call;
 	ax25_cb *ax25s;
 
 	if (ax25cmp(&rose_callsign, &null_ax25_address) == 0)
-		rose_call = (ax25_address *)neigh->dev->dev_addr;
+		rose_call = (const ax25_address *)neigh->dev->dev_addr;
 	else
 		rose_call = &rose_callsign;
 
···
  */
 static int rose_link_up(struct rose_neigh *neigh)
 {
-	ax25_address *rose_call;
+	const ax25_address *rose_call;
 	ax25_cb *ax25s;
 
 	if (ax25cmp(&rose_callsign, &null_ax25_address) == 0)
-		rose_call = (ax25_address *)neigh->dev->dev_addr;
+		rose_call = (const ax25_address *)neigh->dev->dev_addr;
 	else
 		rose_call = &rose_callsign;