struct pneigh_entry     **phash_buckets;
 };
 
+static inline int neigh_parms_family(struct neigh_parms *p)
+{
+       return p->tbl->family;
+}
+
 #define NEIGH_PRIV_ALIGN       sizeof(long long)
 #define NEIGH_ENTRY_SIZE(size) ALIGN((size), NEIGH_PRIV_ALIGN)
 
                                   size_t *lenp, loff_t *ppos);
 
 int neigh_sysctl_register(struct net_device *dev, struct neigh_parms *p,
-                         char *p_name, proc_handler *proc_handler);
+                         proc_handler *proc_handler);
 void neigh_sysctl_unregister(struct neigh_parms *p);
 
 static inline void __neigh_parms_put(struct neigh_parms *parms)
 
 };
 
 int neigh_sysctl_register(struct net_device *dev, struct neigh_parms *p,
-                         char *p_name, proc_handler *handler)
+                         proc_handler *handler)
 {
        int i;
        struct neigh_sysctl_table *t;
        const char *dev_name_source;
        char neigh_path[ sizeof("net//neigh/") + IFNAMSIZ + IFNAMSIZ ];
+       char *p_name;
 
        t = kmemdup(&neigh_sysctl_template, sizeof(*t), GFP_KERNEL);
        if (!t)
        if (neigh_parms_net(p)->user_ns != &init_user_ns)
                t->neigh_vars[0].procname = NULL;
 
+       switch (neigh_parms_family(p)) {
+       case AF_INET:
+             p_name = "ipv4";
+             break;
+       case AF_INET6:
+             p_name = "ipv6";
+             break;
+       default:
+             BUG();
+       }
+
        snprintf(neigh_path, sizeof(neigh_path), "net/%s/neigh/%s",
                p_name, dev_name_source);
        t->sysctl_header =
 
        dev_add_pack(&arp_packet_type);
        arp_proc_init();
 #ifdef CONFIG_SYSCTL
-       neigh_sysctl_register(NULL, &arp_tbl.parms, "ipv4", NULL);
+       neigh_sysctl_register(NULL, &arp_tbl.parms, NULL);
 #endif
        register_netdevice_notifier(&arp_netdev_notifier);
 }
 
 
 static void devinet_sysctl_register(struct in_device *idev)
 {
-       neigh_sysctl_register(idev->dev, idev->arp_parms, "ipv4", NULL);
+       neigh_sysctl_register(idev->dev, idev->arp_parms, NULL);
        __devinet_sysctl_register(dev_net(idev->dev), idev->dev->name,
                                        &idev->cnf);
 }
 
 
 static void addrconf_sysctl_register(struct inet6_dev *idev)
 {
-       neigh_sysctl_register(idev->dev, idev->nd_parms, "ipv6",
+       neigh_sysctl_register(idev->dev, idev->nd_parms,
                              &ndisc_ifinfo_sysctl_change);
        __addrconf_sysctl_register(dev_net(idev->dev), idev->dev->name,
                                        idev, &idev->cnf);
 
        neigh_table_init(&nd_tbl);
 
 #ifdef CONFIG_SYSCTL
-       err = neigh_sysctl_register(NULL, &nd_tbl.parms, "ipv6",
+       err = neigh_sysctl_register(NULL, &nd_tbl.parms,
                                    &ndisc_ifinfo_sysctl_change);
        if (err)
                goto out_unregister_pernet;