rds: use kmem_cache_zalloc instead of kmem_cache_alloc/memset

Use kmem_cache_zalloc instead of kmem_cache_alloc/memset.
Signed-off-by: NWei Yongjun <yjwei@cn.fujitsu.com>
Signed-off-by: NAndy Grover <andy.grover@oracle.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

net/rds/connection.c

@@ -148,14 +148,12 @@ static struct rds_connection *__rds_conn_create(__be32 laddr, __be32 faddr,
 	if (conn)
 		goto out;
 
-	conn = kmem_cache_alloc(rds_conn_slab, gfp);
+	conn = kmem_cache_zalloc(rds_conn_slab, gfp);
 	if (conn == NULL) {
 		conn = ERR_PTR(-ENOMEM);
 		goto out;
 	}
 
-	memset(conn, 0, sizeof(*conn));
-
 	INIT_HLIST_NODE(&conn->c_hash_node);
 	conn->c_version = RDS_PROTOCOL_3_0;
 	conn->c_laddr = laddr;