neigh: Get rid of neigh_table->kmem_cachep

We are going to alloc for device specific private areas for
neighbour entries, and in order to do that we have to move
away from the fixed allocation size enforced by using
neigh_table->kmem_cachep

As a nice side effect we can now use kfree_rcu().

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

1 files changed, 2 insertions, 16 deletions

diff --git a/net/core/neighbour.c b/net/core/neighbour.c
index 27d3fef..661ad12 100644
--- a/net/core/neighbour.c
+++ b/net/core/neighbour.c
@@ -288,7 +288,7 @@ static struct neighbour *neigh_alloc(struct neigh_table *tbl)
 			goto out_entries;
 	}
 
-	n = kmem_cache_zalloc(tbl->kmem_cachep, GFP_ATOMIC);
+	n = kzalloc(tbl->entry_size, GFP_ATOMIC);
 	if (!n)
 		goto out_entries;
 
@@ -678,12 +678,6 @@ static inline void neigh_parms_put(struct neigh_parms *parms)
 		neigh_parms_destroy(parms);
 }
 
-static void neigh_destroy_rcu(struct rcu_head *head)
-{
-	struct neighbour *neigh = container_of(head, struct neighbour, rcu);
-
-	kmem_cache_free(neigh->tbl->kmem_cachep, neigh);
-}
 /*
  *	neighbour must already be out of the table;
  *
@@ -711,7 +705,7 @@ void neigh_destroy(struct neighbour *neigh)
 	NEIGH_PRINTK2("neigh %p is destroyed.\n", neigh);
 
 	atomic_dec(&neigh->tbl->entries);
-	call_rcu(&neigh->rcu, neigh_destroy_rcu);
+	kfree_rcu(neigh, rcu);
 }
 EXPORT_SYMBOL(neigh_destroy);
 
@@ -1486,11 +1480,6 @@ void neigh_table_init_no_netlink(struct neigh_table *tbl)
 	tbl->parms.reachable_time =
 			  neigh_rand_reach_time(tbl->parms.base_reachable_time);
 
-	if (!tbl->kmem_cachep)
-		tbl->kmem_cachep =
-			kmem_cache_create(tbl->id, tbl->entry_size, 0,
-					  SLAB_HWCACHE_ALIGN|SLAB_PANIC,
-					  NULL);
 	tbl->stats = alloc_percpu(struct neigh_statistics);
 	if (!tbl->stats)
 		panic("cannot create neighbour cache statistics");
@@ -1575,9 +1564,6 @@ int neigh_table_clear(struct neigh_table *tbl)
 	free_percpu(tbl->stats);
 	tbl->stats = NULL;
 
-	kmem_cache_destroy(tbl->kmem_cachep);
-	tbl->kmem_cachep = NULL;
-
 	return 0;
 }
 EXPORT_SYMBOL(neigh_table_clear);