From: Qinglang Miao <miaoqinglang@huawei.com>Date: Thu, 17 Sep 2020 20:45:07 +0800> Use DEFINE_SHOW_ATTRIBUTE macro to simplify the code.> > Signed-off-by: Qinglang Miao <miaoqinglang@huawei.com>> ---> v2: based on linux-next(20200917), and can be applied to> mainline cleanly now.Applied.