can: make struct can_proto const

commit 53914b67993c724cec585863755c9ebc8446e83b had the
same message. That commit did put everything in place but
did not make can_proto const itself.

Signed-off-by: Kurt Van Dijck <kurt.van.dijck@eia.be>
Acked-by: Oliver Hartkopp <socketcan@hartkopp.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

include/linux/can/core.h

@@ -44,8 +44,8 @@ struct can_proto {
 
 /* function prototypes for the CAN networklayer core (af_can.c) */
 
-extern int  can_proto_register(struct can_proto *cp);
-extern void can_proto_unregister(struct can_proto *cp);
+extern int  can_proto_register(const struct can_proto *cp);
+extern void can_proto_unregister(const struct can_proto *cp);
 
 extern int  can_rx_register(struct net_device *dev, canid_t can_id,
 			    canid_t mask,

net/can/af_can.c

@@ -84,7 +84,7 @@ static DEFINE_SPINLOCK(can_rcvlists_lock);
 static struct kmem_cache *rcv_cache __read_mostly;
 
 /* table of registered CAN protocols */
-static struct can_proto *proto_tab[CAN_NPROTO] __read_mostly;
+static const struct can_proto *proto_tab[CAN_NPROTO] __read_mostly;
 static DEFINE_MUTEX(proto_tab_lock);
 
 struct timer_list can_stattimer;   /* timer for statistics update */
@@ -115,9 +115,9 @@ static void can_sock_destruct(struct sock *sk)
 	skb_queue_purge(&sk->sk_receive_queue);
 }
 
-static struct can_proto *can_try_module_get(int protocol)
+static const struct can_proto *can_try_module_get(int protocol)
 {
-	struct can_proto *cp;
+	const struct can_proto *cp;
 
 	rcu_read_lock();
 	cp = rcu_dereference(proto_tab[protocol]);
@@ -132,7 +132,7 @@ static int can_create(struct net *net, struct socket *sock, int protocol,
 		      int kern)
 {
 	struct sock *sk;
-	struct can_proto *cp;
+	const struct can_proto *cp;
 	int err = 0;
 
 	sock->state = SS_UNCONNECTED;
@@ -691,7 +691,7 @@ drop:
  *  -EBUSY  protocol already in use
  *  -ENOBUF if proto_register() fails
  */
-int can_proto_register(struct can_proto *cp)
+int can_proto_register(const struct can_proto *cp)
 {
 	int proto = cp->protocol;
 	int err = 0;
@@ -728,7 +728,7 @@ EXPORT_SYMBOL(can_proto_register);
  * can_proto_unregister - unregister CAN transport protocol
  * @cp: pointer to CAN protocol structure
  */
-void can_proto_unregister(struct can_proto *cp)
+void can_proto_unregister(const struct can_proto *cp)
 {
 	int proto = cp->protocol;
 

net/can/bcm.c

@@ -1601,7 +1601,7 @@ static struct proto bcm_proto __read_mostly = {
 	.init       = bcm_init,
 };
 
-static struct can_proto bcm_can_proto __read_mostly = {
+static const struct can_proto bcm_can_proto = {
 	.type       = SOCK_DGRAM,
 	.protocol   = CAN_BCM,
 	.ops        = &bcm_ops,

net/can/raw.c

@@ -774,7 +774,7 @@ static struct proto raw_proto __read_mostly = {
 	.init       = raw_init,
 };
 
-static struct can_proto raw_can_proto __read_mostly = {
+static const struct can_proto raw_can_proto = {
 	.type       = SOCK_RAW,
 	.protocol   = CAN_RAW,
 	.ops        = &raw_ops,