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can: make struct proto const

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

Setting the reference to the common can_ioctl() in all CAN protocols directly
removes the need to make the struct proto writable in af_can.c

Signed-off-by: Kurt Van Dijck <kurt.van.dijck@eia.be>
Signed-off-by: Oliver Hartkopp <socketcan@hartkopp.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Oliver Hartkopp
2011-03-22 08:27:25 +00:00
committed by David S. Miller
parent 3b261ade42
commit 53914b6799
4 changed files with 12 additions and 14 deletions
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9
net/can/af_can.c
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@@ -95,7 +95,7 @@ struct s_pstats can_pstats; /* receive list statistics */
* af_can socket functions
*/
static int can_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
int can_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
{
struct sock *sk = sock->sk;
@@ -108,6 +108,7 @@ static int can_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
return -ENOIOCTLCMD;
}
}
EXPORT_SYMBOL(can_ioctl);
static void can_sock_destruct(struct sock *sk)
{
@@ -698,13 +699,9 @@ int can_proto_register(struct can_proto *cp)
printk(KERN_ERR "can: protocol %d already registered\n",
proto);
err = -EBUSY;
} else {
} else
proto_tab[proto] = cp;
/* use generic ioctl function if not defined by module */
if (!cp->ops->ioctl)
cp->ops->ioctl = can_ioctl;
}
spin_unlock(&proto_tab_lock);
if (err < 0)