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: Christoph Hellwig X-Patchwork-Id: 11909555 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id C1D71697 for ; Mon, 16 Nov 2020 15:12:48 +0000 (UTC) Received: from lists.xenproject.org (lists.xenproject.org [192.237.175.120]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 99D95216C4 for ; Mon, 16 Nov 2020 15:12:48 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="CW2g8R0f" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 99D95216C4 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=lst.de Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=xen-devel-bounces@lists.xenproject.org Received: from list by lists.xenproject.org with outflank-mailman.28282.57413 (Exim 4.92) (envelope-from ) id 1kegAb-0007JV-Kh; Mon, 16 Nov 2020 15:11:53 +0000 X-Outflank-Mailman: Message body and most headers restored to incoming version Received: by outflank-mailman (output) from mailman id 28282.57413; Mon, 16 Nov 2020 15:11:53 +0000 X-BeenThere: xen-devel@lists.xenproject.org List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xenproject.org Precedence: list Sender: "Xen-devel" Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1kegAa-0007Hv-4B; Mon, 16 Nov 2020 15:11:52 +0000 Received: by outflank-mailman (input) for mailman id 28282; Mon, 16 Nov 2020 15:11:42 +0000 Received: from us1-rack-iad1.inumbo.com ([172.99.69.81]) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1keg0j-0006ni-5P for xen-devel@lists.xenproject.org; Mon, 16 Nov 2020 15:01:41 +0000 Received: from casper.infradead.org (unknown [2001:8b0:10b:1236::1]) by us1-rack-iad1.inumbo.com (Halon) with ESMTPS id 413e75f1-1a97-4439-9c30-58a420666853; Mon, 16 Nov 2020 14:59:15 +0000 (UTC) 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 Received: from us1-rack-iad1.inumbo.com ([172.99.69.81]) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1keg0j-0006ni-5P for xen-devel@lists.xenproject.org; Mon, 16 Nov 2020 15:01:41 +0000 X-Inumbo-ID: 413e75f1-1a97-4439-9c30-58a420666853 Received: from casper.infradead.org (unknown [2001:8b0:10b:1236::1]) by us1-rack-iad1.inumbo.com (Halon) with ESMTPS id 413e75f1-1a97-4439-9c30-58a420666853; Mon, 16 Nov 2020 14:59:15 +0000 (UTC) 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?= =?utf-8?q?=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 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); /*