mm/list_lru.c: fold __list_lru_count_one() into its caller

__list_lru_count_one() has a single callsite.

Acked-by: Vladimir Davydov <vdavydov.dev@gmail.com>
Cc: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Cc: Kirill Tkhai <ktkhai@virtuozzo.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

mm/list_lru.c

@@ -162,26 +162,20 @@ void list_lru_isolate_move(struct list_lru_one *list, struct list_head *item,
 }
 EXPORT_SYMBOL_GPL(list_lru_isolate_move);
 
-static unsigned long __list_lru_count_one(struct list_lru *lru,
-					  int nid, int memcg_idx)
+unsigned long list_lru_count_one(struct list_lru *lru,
+				 int nid, struct mem_cgroup *memcg)
 {
 	struct list_lru_node *nlru = &lru->node[nid];
 	struct list_lru_one *l;
 	unsigned long count;
 
 	rcu_read_lock();
-	l = list_lru_from_memcg_idx(nlru, memcg_idx);
+	l = list_lru_from_memcg_idx(nlru, memcg_cache_id(memcg));
 	count = l->nr_items;
 	rcu_read_unlock();
 
 	return count;
 }
-
-unsigned long list_lru_count_one(struct list_lru *lru,
-				 int nid, struct mem_cgroup *memcg)
-{
-	return __list_lru_count_one(lru, nid, memcg_cache_id(memcg));
-}
 EXPORT_SYMBOL_GPL(list_lru_count_one);
 
 unsigned long list_lru_count_node(struct list_lru *lru, int nid)