mm/list_lru.c: remove kvfree_rcu_local()

The list_lru file used to have local kvfree_rcu() which was renamed by
commit e0feed08 ("mm/list_lru.c: Rename kvfree_rcu() to local
variant") to introduce the globally visible kvfree_rcu().

Now we have global kvfree_rcu(), so remove the local kvfree_rcu_local()
and just use the global one.

Link: https://lkml.kernel.org/r/20210207152148.1285842-1-shakeelb@google.comSigned-off-by: Shakeel Butt <shakeelb@google.com>
Reviewed-by: Uladzislau Rezki <urezki@gmail.com>
Reviewed-by: Kirill Tkhai <ktkhai@virtuozzo.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

mm/list_lru.c

@@ -373,21 +373,13 @@ static void memcg_destroy_list_lru_node(struct list_lru_node *nlru)
 	struct list_lru_memcg *memcg_lrus;
 	/*
 	 * This is called when shrinker has already been unregistered,
-	 * and nobody can use it. So, there is no need to use kvfree_rcu_local().
+	 * and nobody can use it. So, there is no need to use kvfree_rcu().
 	 */
 	memcg_lrus = rcu_dereference_protected(nlru->memcg_lrus, true);
 	__memcg_destroy_list_lru_node(memcg_lrus, 0, memcg_nr_cache_ids);
 	kvfree(memcg_lrus);
 }
 
-static void kvfree_rcu_local(struct rcu_head *head)
-{
-	struct list_lru_memcg *mlru;
-
-	mlru = container_of(head, struct list_lru_memcg, rcu);
-	kvfree(mlru);
-}
-
 static int memcg_update_list_lru_node(struct list_lru_node *nlru,
 				      int old_size, int new_size)
 {
@@ -419,7 +411,7 @@ static int memcg_update_list_lru_node(struct list_lru_node *nlru,
 	rcu_assign_pointer(nlru->memcg_lrus, new);
 	spin_unlock_irq(&nlru->lock);
 
-	call_rcu(&old->rcu, kvfree_rcu_local);
+	kvfree_rcu(old, rcu);
 	return 0;
 }