net decnet: Convert to use register_net_sysctl

Using an ascii path to register_net_sysctl as opposed to the slightly
awkward ctl_path allows for much simpler code.
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Acked-by: Pavel Emelyanov <xemul@parallels.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/decnet/dn_dev.c

@@ -209,15 +209,7 @@ static void dn_dev_sysctl_register(struct net_device *dev, struct dn_dev_parms *
 	struct dn_dev_sysctl_table *t;
 	int i;
 
-#define DN_CTL_PATH_DEV	3
-
-	struct ctl_path dn_ctl_path[] = {
-		{ .procname = "net",  },
-		{ .procname = "decnet",  },
-		{ .procname = "conf",  },
-		{ /* to be set */ },
-		{ },
-	};
+	char path[sizeof("net/decnet/conf/") + IFNAMSIZ];
 
 	t = kmemdup(&dn_dev_sysctl, sizeof(*t), GFP_KERNEL);
 	if (t == NULL)
@@ -228,15 +220,12 @@ static void dn_dev_sysctl_register(struct net_device *dev, struct dn_dev_parms *
 		t->dn_dev_vars[i].data = ((char *)parms) + offset;
 	}
 
-	if (dev) {
-		dn_ctl_path[DN_CTL_PATH_DEV].procname = dev->name;
-	} else {
-		dn_ctl_path[DN_CTL_PATH_DEV].procname = parms->name;
-	}
+	snprintf(path, sizeof(path), "net/decnet/conf/%s",
+		dev? dev->name : parms->name);
 
 	t->dn_dev_vars[0].extra1 = (void *)dev;
 
-	t->sysctl_header = register_net_sysctl_table(&init_net, dn_ctl_path, t->dn_dev_vars);
+	t->sysctl_header = register_net_sysctl(&init_net, path, t->dn_dev_vars);
 	if (t->sysctl_header == NULL)
 		kfree(t);
 	else

net/decnet/sysctl_net_decnet.c

@@ -351,15 +351,9 @@ static ctl_table dn_table[] = {
 	{ }
 };
 
-static struct ctl_path dn_path[] = {
-	{ .procname = "net", },
-	{ .procname = "decnet", },
-	{ }
-};
-
 void dn_register_sysctl(void)
 {
-	dn_table_header = register_net_sysctl_table(&init_net, dn_path, dn_table);
+	dn_table_header = register_net_sysctl(&init_net, "net/decnet", dn_table);
 }
 
 void dn_unregister_sysctl(void)