[PATCH 17/17] netfilter: xt_hashlimit: replace call_rcu by kfree_rcu for simple kmem_cache_free callback

[Julia Lawall <Julia.Lawall@inria.fr>]

Since SLOB was removed and since
commit 6c6c47b063b5 ("mm, slab: call kvfree_rcu_barrier() from kmem_cache_destroy()"),
it is not necessary to use call_rcu when the callback only performs
kmem_cache_free. Use kfree_rcu() directly.

The changes were made using Coccinelle.

Signed-off-by: Julia Lawall <Julia.Lawall@inria.fr>

---
 net/netfilter/xt_hashlimit.c |    9 +--------
 1 file changed, 1 insertion(+), 8 deletions(-)

diff --git a/net/netfilter/xt_hashlimit.c b/net/netfilter/xt_hashlimit.c
index 0859b8f76764..c2b9b954eb53 100644
--- a/net/netfilter/xt_hashlimit.c
+++ b/net/netfilter/xt_hashlimit.c
@@ -256,18 +256,11 @@ dsthash_alloc_init(struct xt_hashlimit_htable *ht,
 	return ent;
 }
 
-static void dsthash_free_rcu(struct rcu_head *head)
-{
-	struct dsthash_ent *ent = container_of(head, struct dsthash_ent, rcu);
-
-	kmem_cache_free(hashlimit_cachep, ent);
-}
-
 static inline void
 dsthash_free(struct xt_hashlimit_htable *ht, struct dsthash_ent *ent)
 {
 	hlist_del_rcu(&ent->node);
-	call_rcu(&ent->rcu, dsthash_free_rcu);
+	kfree_rcu(ent, rcu);
 	ht->count--;
 }
 static void htable_gc(struct work_struct *work);