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From: Christoph Hellwig <hch@lst.de>
To: Jens Axboe <axboe@kernel.dk>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	"Rafael J. Wysocki" <rafael@kernel.org>,
	Denis Efremov <efremov@linux.com>,
	"David S. Miller" <davem@davemloft.net>,
	Song Liu <song@kernel.org>, Al Viro <viro@zeniv.linux.org.uk>,
	Finn Thain <fthain@telegraphics.com.au>,
	Michael Schmitz <schmitzmic@gmail.com>,
	linux-block@vger.kernel.org, linux-kernel@vger.kernel.org,
	linux-ide@vger.kernel.org, linux-raid@vger.kernel.org,
	linux-scsi@vger.kernel.org, linux-m68k@lists.linux-m68k.org,
	Hannes Reinecke <hare@suse.de>
Subject: [PATCH 01/18] block: cleanup del_gendisk a bit
Date: Thu, 29 Oct 2020 15:58:24 +0100	[thread overview]
Message-ID: <20201029145841.144173-2-hch@lst.de> (raw)
In-Reply-To: <20201029145841.144173-1-hch@lst.de>

Merge three hidden gendisk checks into one.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Hannes Reinecke <hare@suse.de>
---
 block/genhd.c | 15 ++++++++-------
 1 file changed, 8 insertions(+), 7 deletions(-)

diff --git a/block/genhd.c b/block/genhd.c
index 0a273211fec283..3ed591970ea640 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);
 	/*
-- 
2.28.0


  reply	other threads:[~2020-10-29 15:03 UTC|newest]

Thread overview: 31+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-10-29 14:58 simplify gendisk lookup and remove struct block_device aliases v4 Christoph Hellwig
2020-10-29 14:58 ` Christoph Hellwig [this message]
2020-10-29 14:58 ` [PATCH 02/18] block: open code kobj_map into in block/genhd.c Christoph Hellwig
2020-10-29 19:22   ` Greg Kroah-Hartman
2020-10-29 19:32     ` Christoph Hellwig
2020-10-30 10:40       ` Greg Kroah-Hartman
2020-10-30 10:49         ` Geert Uytterhoeven
2020-10-30 11:06           ` Greg Kroah-Hartman
2020-10-31  8:53         ` Christoph Hellwig
2020-10-29 14:58 ` [PATCH 03/18] block: split block_class_lock Christoph Hellwig
2020-10-29 14:58 ` [PATCH 04/18] block: rework requesting modules for unclaimed devices Christoph Hellwig
2020-10-29 14:58 ` [PATCH 05/18] block: add an optional probe callback to major_names Christoph Hellwig
2020-10-29 14:58 ` [PATCH 06/18] ide: remove ide_{,un}register_region Christoph Hellwig
2020-10-29 14:58 ` [PATCH 07/18] swim: don't call blk_register_region Christoph Hellwig
2020-10-29 14:58 ` [PATCH 08/18] sd: use __register_blkdev to avoid a modprobe for an unregistered dev_t Christoph Hellwig
2020-10-30  2:13   ` Martin K. Petersen
2020-10-29 14:58 ` [PATCH 09/18] brd: use __register_blkdev to allocate devices on demand Christoph Hellwig
2020-10-29 14:58 ` [PATCH 10/18] loop: " Christoph Hellwig
2020-10-29 14:58 ` [PATCH 11/18] md: " Christoph Hellwig
2020-10-29 14:58 ` [PATCH 12/18] ide: switch to __register_blkdev for command set probing Christoph Hellwig
2020-10-29 14:58 ` [PATCH 13/18] floppy: use a separate gendisk for each media format Christoph Hellwig
2020-10-29 14:58 ` [PATCH 14/18] amiflop: use separate gendisks for Amiga vs MS-DOS mode Christoph Hellwig
2020-10-29 14:58 ` [PATCH 15/18] ataflop: use a separate gendisk for each media format Christoph Hellwig
2020-10-29 14:58 ` [PATCH 16/18] z2ram: reindent Christoph Hellwig
2020-10-29 14:58 ` [PATCH 17/18] z2ram: use separate gendisk for the different modes Christoph Hellwig
2020-10-30  0:11   ` [PATCH] z2ram: MODULE_LICENSE update and neatening Joe Perches
2020-10-30  1:01     ` James Bottomley
2020-10-30  1:23       ` Joe Perches
2020-10-29 14:58 ` [PATCH 18/18] block: switch gendisk lookup to a simple xarray Christoph Hellwig
2020-11-11  7:57 ` simplify gendisk lookup and remove struct block_device aliases v4 Christoph Hellwig
2020-11-11 16:17 ` Jens Axboe

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