[NET]: Privatize {P,}NEIGH_HASHMASK.

Signed-off-by: David S. Miller <davem@davemloft.net>

include/net/neighbour.h

@@ -140,9 +140,6 @@ struct pneigh_entry
 	u8			key[0];
 };
 
-#define NEIGH_HASHMASK		0x1F
-#define PNEIGH_HASHMASK		0xF
-
 /*
  *	neighbour table manipulation
  */
@@ -176,8 +173,8 @@ struct neigh_table
 	struct neigh_parms	*parms_list;
 	kmem_cache_t		*kmem_cachep;
 	struct neigh_statistics	stats;
-	struct neighbour	*hash_buckets[NEIGH_HASHMASK+1];
-	struct pneigh_entry	*phash_buckets[PNEIGH_HASHMASK+1];
+	struct neighbour	**hash_buckets;
+	struct pneigh_entry	**phash_buckets;
 };
 
 /* flags for neigh_update() */

net/core/neighbour.c

@@ -47,6 +47,9 @@
 #define NEIGH_PRINTK2 NEIGH_PRINTK
 #endif
 
+#define NEIGH_HASHMASK		0x1F
+#define PNEIGH_HASHMASK		0xF
+
 static void neigh_timer_handler(unsigned long arg);
 #ifdef CONFIG_ARPD
 static void neigh_app_notify(struct neighbour *n);
@@ -1205,6 +1208,7 @@ void neigh_parms_destroy(struct neigh_parms *parms)
 void neigh_table_init(struct neigh_table *tbl)
 {
 	unsigned long now = jiffies;
+	unsigned long hsize, phsize;
 
 	atomic_set(&tbl->parms.refcnt, 1);
 	INIT_RCU_HEAD(&tbl->parms.rcu_head);
@@ -1220,6 +1224,18 @@ void neigh_table_init(struct neigh_table *tbl)
 	if (!tbl->kmem_cachep)
 		panic("cannot create neighbour cache");
 
+	hsize = (NEIGH_HASHMASK + 1) * sizeof(struct neighbour *);
+	tbl->hash_buckets = kmalloc(hsize, GFP_KERNEL);
+
+	phsize = (PNEIGH_HASHMASK + 1) * sizeof(struct pneigh_entry *);
+	tbl->phash_buckets = kmalloc(phsize, GFP_KERNEL);
+
+	if (!tbl->hash_buckets || !tbl->phash_buckets)
+		panic("cannot allocate neighbour cache hashes");
+
+	memset(tbl->hash_buckets, 0, hsize);
+	memset(tbl->phash_buckets, 0, phsize);
+
 	tbl->lock	       = RW_LOCK_UNLOCKED;
 	init_timer(&tbl->gc_timer);
 	tbl->gc_timer.data     = (unsigned long)tbl;
@@ -1260,6 +1276,13 @@ int neigh_table_clear(struct neigh_table *tbl)
 		}
 	}
 	write_unlock(&neigh_tbl_lock);
+
+	kfree(tbl->hash_buckets);
+	tbl->hash_buckets = NULL;
+
+	kfree(tbl->phash_buckets);
+	tbl->phash_buckets = NULL;
+
 	return 0;
 }