From patchwork Wed Dec 23 11:26:19 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jingbo Xu X-Patchwork-Id: 11988243 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,UNPARSEABLE_RELAY,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 8D989C43333 for ; Wed, 23 Dec 2020 11:27:15 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 518A9223C8 for ; Wed, 23 Dec 2020 11:27:15 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728503AbgLWL1J (ORCPT ); Wed, 23 Dec 2020 06:27:09 -0500 Received: from out30-56.freemail.mail.aliyun.com ([115.124.30.56]:39417 "EHLO out30-56.freemail.mail.aliyun.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728435AbgLWL1I (ORCPT ); Wed, 23 Dec 2020 06:27:08 -0500 X-Alimail-AntiSpam: AC=PASS;BC=-1|-1;BR=01201311R431e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=e01e04407;MF=jefflexu@linux.alibaba.com;NM=1;PH=DS;RN=4;SR=0;TI=SMTPD_---0UJWwKPG_1608722785; Received: from localhost(mailfrom:jefflexu@linux.alibaba.com fp:SMTPD_---0UJWwKPG_1608722785) by smtp.aliyun-inc.com(127.0.0.1); Wed, 23 Dec 2020 19:26:25 +0800 From: Jeffle Xu To: snitzer@redhat.com Cc: linux-block@vger.kernel.org, dm-devel@redhat.com, io-uring@vger.kernel.org Subject: [PATCH RFC 2/7] block: add helper function fetching gendisk from queue Date: Wed, 23 Dec 2020 19:26:19 +0800 Message-Id: <20201223112624.78955-3-jefflexu@linux.alibaba.com> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20201223112624.78955-1-jefflexu@linux.alibaba.com> References: <20201223112624.78955-1-jefflexu@linux.alibaba.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org Sometimes we need to get the corresponding gendisk from request_queue. One such use case is that, the block device driver had ever stored the same private data both in queue->queuedata and gendisk->private_data, while nowadays gendisk->private_data is more preferable in such case, e.g. commit c4a59c4e5db3 ("dm: stop using ->queuedata"). So if only request_queue given, we need to get the corresponding gendisk from queue, to get the private data stored in gendisk. Signed-off-by: Jeffle Xu Signed-off-by: Jeffle Xu --- include/linux/blkdev.h | 2 ++ include/trace/events/kyber.h | 6 +++--- 2 files changed, 5 insertions(+), 3 deletions(-) diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h index 070de09425ad..2303d06a5a82 100644 --- a/include/linux/blkdev.h +++ b/include/linux/blkdev.h @@ -691,6 +691,8 @@ static inline bool blk_account_rq(struct request *rq) dma_map_page_attrs(dev, (bv)->bv_page, (bv)->bv_offset, (bv)->bv_len, \ (dir), (attrs)) +#define queue_to_disk(q) (dev_to_disk(kobj_to_dev((q)->kobj.parent))) + static inline bool queue_is_mq(struct request_queue *q) { return q->mq_ops; diff --git a/include/trace/events/kyber.h b/include/trace/events/kyber.h index c0e7d24ca256..f9802562edf6 100644 --- a/include/trace/events/kyber.h +++ b/include/trace/events/kyber.h @@ -30,7 +30,7 @@ TRACE_EVENT(kyber_latency, ), TP_fast_assign( - __entry->dev = disk_devt(dev_to_disk(kobj_to_dev(q->kobj.parent))); + __entry->dev = disk_devt(queue_to_disk(q)); strlcpy(__entry->domain, domain, sizeof(__entry->domain)); strlcpy(__entry->type, type, sizeof(__entry->type)); __entry->percentile = percentile; @@ -59,7 +59,7 @@ TRACE_EVENT(kyber_adjust, ), TP_fast_assign( - __entry->dev = disk_devt(dev_to_disk(kobj_to_dev(q->kobj.parent))); + __entry->dev = disk_devt(queue_to_disk(q)); strlcpy(__entry->domain, domain, sizeof(__entry->domain)); __entry->depth = depth; ), @@ -81,7 +81,7 @@ TRACE_EVENT(kyber_throttled, ), TP_fast_assign( - __entry->dev = disk_devt(dev_to_disk(kobj_to_dev(q->kobj.parent))); + __entry->dev = disk_devt(queue_to_disk(q)); strlcpy(__entry->domain, domain, sizeof(__entry->domain)); ),