mm/memcontrol.c: remove the unused arg in __memcg_kmem_get_cache()

The gfp was passed in but never used in this function.
Signed-off-by: Zhang Zhen <zhenzhang.zhang@huawei.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

include/linux/memcontrol.h

@@ -401,7 +401,7 @@ int memcg_cache_id(struct mem_cgroup *memcg);
 void memcg_update_array_size(int num_groups);
 
 struct kmem_cache *
-__memcg_kmem_get_cache(struct kmem_cache *cachep, gfp_t gfp);
+__memcg_kmem_get_cache(struct kmem_cache *cachep);
 
 int __memcg_charge_slab(struct kmem_cache *cachep, gfp_t gfp, int order);
 void __memcg_uncharge_slab(struct kmem_cache *cachep, int order);
@@ -492,7 +492,7 @@ memcg_kmem_get_cache(struct kmem_cache *cachep, gfp_t gfp)
 	if (unlikely(fatal_signal_pending(current)))
 		return cachep;
 
-	return __memcg_kmem_get_cache(cachep, gfp);
+	return __memcg_kmem_get_cache(cachep);
 }
 #else
 #define for_each_memcg_cache_index(_idx)	\

mm/memcontrol.c

@@ -2804,8 +2804,7 @@ void __memcg_uncharge_slab(struct kmem_cache *cachep, int order)
  * Can't be called in interrupt context or from kernel threads.
  * This function needs to be called with rcu_read_lock() held.
  */
-struct kmem_cache *__memcg_kmem_get_cache(struct kmem_cache *cachep,
-					  gfp_t gfp)
+struct kmem_cache *__memcg_kmem_get_cache(struct kmem_cache *cachep)
 {
 	struct mem_cgroup *memcg;
 	struct kmem_cache *memcg_cachep;