From patchwork Mon Nov 16 14:57:26 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: hch X-Patchwork-Id: 325864 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=-12.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,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 70768C8303B for ; Mon, 16 Nov 2020 14:59:31 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 3740522240 for ; Mon, 16 Nov 2020 14:59:31 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="CW2g8R0f" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730866AbgKPO7R (ORCPT ); Mon, 16 Nov 2020 09:59:17 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49066 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730846AbgKPO7M (ORCPT ); Mon, 16 Nov 2020 09:59:12 -0500 Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:8b0:10b:1236::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id CD190C0613CF; Mon, 16 Nov 2020 06:59:12 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=Content-Transfer-Encoding:MIME-Version: References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From:Sender:Reply-To: Content-Type:Content-ID:Content-Description; bh=ceSruCVWzLax0XFB3PV+YChHyJOUoDTFl1AuzUG7uKo=; b=CW2g8R0fi9IlSMs6PB15CroPmB VwoaOYD9bMi1DVWfaTM4vlulUe111h2RI3tztOT5WMq0qsSqGFH2pFQe0NOcqNLdex+g9q4BMMVZP /6TuwzASGMA1SrkPTvS7l/wvEgTeWNYqEdTqZb/ZtDyfrlGP270HGrcmH7UeWoKasPCt9CokG+QBB a2OdxXHzodz4vx5g/ZqCX44oTJtSk/OzRCJ8dKXSw80cEaDg4gDxz1oQY0QautKMW+b4o+TDgBAIv i8SHCduCi7NL+7FPVx6mbW4O37u1Dt6jRtYD7qdW2goUC6ahFPGml0cbg+8h8UcWX3F//bKVJttjN HevPpOdA==; Received: from [2001:4bb8:180:6600:255b:7def:a93:4a09] (helo=localhost) by casper.infradead.org with esmtpsa (Exim 4.92.3 #3 (Red Hat Linux)) id 1kefy7-0003wG-IY; Mon, 16 Nov 2020 14:58:59 +0000 From: Christoph Hellwig To: Jens Axboe Cc: Justin Sanders , Josef Bacik , Ilya Dryomov , Jack Wang , "Michael S. Tsirkin" , Jason Wang , Paolo Bonzini , Stefan Hajnoczi , Konrad Rzeszutek Wilk , =?utf-8?q?Roger_Pau_Monn=C3=A9?= , Minchan Kim , Mike Snitzer , Song Liu , "Martin K. Petersen" , dm-devel@redhat.com, linux-block@vger.kernel.org, drbd-dev@lists.linbit.com, nbd@other.debian.org, ceph-devel@vger.kernel.org, xen-devel@lists.xenproject.org, linux-raid@vger.kernel.org, linux-nvme@lists.infradead.org, linux-scsi@vger.kernel.org, linux-fsdevel@vger.kernel.org, Hannes Reinecke Subject: [PATCH 35/78] block: cleanup del_gendisk a bit Date: Mon, 16 Nov 2020 15:57:26 +0100 Message-Id: <20201116145809.410558-36-hch@lst.de> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20201116145809.410558-1-hch@lst.de> References: <20201116145809.410558-1-hch@lst.de> MIME-Version: 1.0 X-SRS-Rewrite: SMTP reverse-path rewritten from by casper.infradead.org. See http://www.infradead.org/rpr.html Precedence: bulk List-ID: X-Mailing-List: ceph-devel@vger.kernel.org Merge three hidden gendisk checks into one. Signed-off-by: Christoph Hellwig Reviewed-by: Hannes Reinecke --- block/genhd.c | 15 ++++++++------- 1 file changed, 8 insertions(+), 7 deletions(-) diff --git a/block/genhd.c b/block/genhd.c index b0f0b0cac9aa7f..8180195b76634b 100644 --- a/block/genhd.c +++ b/block/genhd.c @@ -892,6 +892,9 @@ void del_gendisk(struct gendisk *disk) might_sleep(); + if (WARN_ON_ONCE(!disk->queue)) + return; + blk_integrity_del(disk); disk_del_events(disk); @@ -914,20 +917,18 @@ void del_gendisk(struct gendisk *disk) disk->flags &= ~GENHD_FL_UP; up_write(&disk->lookup_sem); - if (!(disk->flags & GENHD_FL_HIDDEN)) + if (!(disk->flags & GENHD_FL_HIDDEN)) { sysfs_remove_link(&disk_to_dev(disk)->kobj, "bdi"); - if (disk->queue) { + /* * Unregister bdi before releasing device numbers (as they can * get reused and we'd get clashes in sysfs). */ - if (!(disk->flags & GENHD_FL_HIDDEN)) - bdi_unregister(disk->queue->backing_dev_info); - blk_unregister_queue(disk); - } else { - WARN_ON(1); + bdi_unregister(disk->queue->backing_dev_info); } + blk_unregister_queue(disk); + if (!(disk->flags & GENHD_FL_HIDDEN)) blk_unregister_region(disk_devt(disk), disk->minors); /*