From patchwork Sat Jan 28 03:04:19 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: zhongjinghua X-Patchwork-Id: 13119621 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id CC1D8C38142 for ; Sat, 28 Jan 2023 02:40:20 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231527AbjA1CkT (ORCPT ); Fri, 27 Jan 2023 21:40:19 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:43114 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229498AbjA1CkT (ORCPT ); Fri, 27 Jan 2023 21:40:19 -0500 Received: from szxga03-in.huawei.com (szxga03-in.huawei.com [45.249.212.189]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E1E3025291; Fri, 27 Jan 2023 18:40:17 -0800 (PST) Received: from kwepemm600002.china.huawei.com (unknown [172.30.72.57]) by szxga03-in.huawei.com (SkyGuard) with ESMTP id 4P3dpv1wMFzJqGQ; Sat, 28 Jan 2023 10:35:51 +0800 (CST) Received: from localhost.localdomain (10.175.127.227) by kwepemm600002.china.huawei.com (7.193.23.29) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.34; Sat, 28 Jan 2023 10:40:15 +0800 From: Zhong Jinghua To: CC: , , , , Subject: [PATCH-next v3] blk-mq: cleanup unused methods: blk_mq_hw_sysfs_store Date: Sat, 28 Jan 2023 11:04:19 +0800 Message-ID: <20230128030419.2780298-1-zhongjinghua@huawei.com> X-Mailer: git-send-email 2.31.1 MIME-Version: 1.0 X-Originating-IP: [10.175.127.227] X-ClientProxiedBy: dggems703-chm.china.huawei.com (10.3.19.180) To kwepemm600002.china.huawei.com (7.193.23.29) X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org We found that the blk_mq_hw_sysfs_store interface has no place to use. The object default_hw_ctx_attrs using blk_mq_hw_sysfs_ops only uses the show method and does not use the store method. Since this patch: 4a46f05ebf99 ("blk-mq: move hctx and ctx counters from sysfs to debugfs") moved the store method to debugfs, the store method is not used anymore. So let me do some tiny work to clean up unused code. Signed-off-by: Zhong Jinghua Reviewed-by: Ming Lei --- v1->v2: changed debuffs to debugfs in commit message v2->v3: as suggested by Christoph Hellwig, remove now unused store method from struct blk_mq_hw_ctx_sysfs_entry block/blk-mq-sysfs.c | 24 ------------------------ 1 file changed, 24 deletions(-) diff --git a/block/blk-mq-sysfs.c b/block/blk-mq-sysfs.c index 93997d297d42..847c0151070f 100644 --- a/block/blk-mq-sysfs.c +++ b/block/blk-mq-sysfs.c @@ -46,7 +46,6 @@ static void blk_mq_hw_sysfs_release(struct kobject *kobj) struct blk_mq_hw_ctx_sysfs_entry { struct attribute attr; ssize_t (*show)(struct blk_mq_hw_ctx *, char *); - ssize_t (*store)(struct blk_mq_hw_ctx *, const char *, size_t); }; static ssize_t blk_mq_hw_sysfs_show(struct kobject *kobj, @@ -70,28 +69,6 @@ static ssize_t blk_mq_hw_sysfs_show(struct kobject *kobj, return res; } -static ssize_t blk_mq_hw_sysfs_store(struct kobject *kobj, - struct attribute *attr, const char *page, - size_t length) -{ - struct blk_mq_hw_ctx_sysfs_entry *entry; - struct blk_mq_hw_ctx *hctx; - struct request_queue *q; - ssize_t res; - - entry = container_of(attr, struct blk_mq_hw_ctx_sysfs_entry, attr); - hctx = container_of(kobj, struct blk_mq_hw_ctx, kobj); - q = hctx->queue; - - if (!entry->store) - return -EIO; - - mutex_lock(&q->sysfs_lock); - res = entry->store(hctx, page, length); - mutex_unlock(&q->sysfs_lock); - return res; -} - static ssize_t blk_mq_hw_sysfs_nr_tags_show(struct blk_mq_hw_ctx *hctx, char *page) { @@ -150,7 +127,6 @@ ATTRIBUTE_GROUPS(default_hw_ctx); static const struct sysfs_ops blk_mq_hw_sysfs_ops = { .show = blk_mq_hw_sysfs_show, - .store = blk_mq_hw_sysfs_store, }; static struct kobj_type blk_mq_ktype = {