Re: [RFC v3 3/6] can: make struct proto const

can_ioctl is the only reason for struct proto to be non-const.
script/check-patch.pl suggests struct proto be const.
This patch performs the necessary change.

Signed-off-by: Kurt Van Dijck <redacted>
---

diff --git a/include/linux/can/core.h b/include/linux/can/core.h
index 430c446..0767cc6 100644
--- a/include/linux/can/core.h
+++ b/include/linux/can/core.h

@@ -39,7 +39,7 @@
 struct can_proto {
 	int              type;
 	int              protocol;
-	struct proto_ops *ops;
+	const struct proto_ops *ops;
 	struct proto     *prot;
 
 	const struct rtnl_af_ops *rtnl_link_ops;

@@ -78,6 +78,8 @@ struct rtgencanmsg {
 
 extern int  can_proto_register(const struct can_proto *cp);
 extern void can_proto_unregister(const struct can_proto *cp);
+extern int can_sock_ioctl(struct socket *sock, unsigned int cmd,
+		unsigned long arg);
 
 extern int  can_rx_register(struct net_device *dev, canid_t can_id,
 			    canid_t mask,

diff --git a/net/can/af_can.c b/net/can/af_can.c
index db59c6e..c1f8c05 100644
--- a/net/can/af_can.c
+++ b/net/can/af_can.c

@@ -139,7 +139,7 @@ static inline void can_put_proto(const struct can_proto *cp)
  * af_can socket functions
  */
 
-static int can_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
+int can_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
 {
 	struct sock *sk = sock->sk;
 

@@ -152,6 +152,7 @@ static int can_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
 		return -ENOIOCTLCMD;
 	}
 }
+EXPORT_SYMBOL(can_sock_ioctl);
 
 static void can_sock_destruct(struct sock *sk)
 {

@@ -720,10 +721,6 @@ int can_proto_register(const struct can_proto *cp)
 		err = -EBUSY;
 	} else {
 		proto_tab[proto] = cp;
-
-		/* use generic ioctl function if not defined by module */
-		if (!cp->ops->ioctl)
-			cp->ops->ioctl = can_ioctl;