From: Christoph Hellwig <hch@lst.de>
To: Jens Axboe <axboe@kernel.dk>, Mike Snitzer <snitzer@redhat.com>
Cc: linux-block@vger.kernel.org, dm-devel@redhat.com
Subject: [dm-devel] [PATCH 2/8] block: remove the extra kobject reference in bd_link_disk_holder
Date: Sun, 25 Jul 2021 07:54:52 +0200 [thread overview]
Message-ID: <20210725055458.29008-3-hch@lst.de> (raw)
In-Reply-To: <20210725055458.29008-1-hch@lst.de>
With the new block_device life time rules there is no way for the
bdev to go away as long as there is a holder, so remove these.
Signed-off-by: Christoph Hellwig <hch@lst.de>
---
block/holder.c | 6 ------
1 file changed, 6 deletions(-)
diff --git a/block/holder.c b/block/holder.c
index 904a1dcd5c12..960654a71342 100644
--- a/block/holder.c
+++ b/block/holder.c
@@ -92,11 +92,6 @@ int bd_link_disk_holder(struct block_device *bdev, struct gendisk *disk)
ret = add_symlink(bdev->bd_holder_dir, &disk_to_dev(disk)->kobj);
if (ret)
goto out_del;
- /*
- * bdev could be deleted beneath us which would implicitly destroy
- * the holder directory. Hold on to it.
- */
- kobject_get(bdev->bd_holder_dir);
list_add(&holder->list, &bdev->bd_holder_disks);
goto out_unlock;
@@ -130,7 +125,6 @@ void bd_unlink_disk_holder(struct block_device *bdev, struct gendisk *disk)
if (!WARN_ON_ONCE(holder == NULL) && !--holder->refcnt) {
del_symlink(disk->slave_dir, bdev_kobj(bdev));
del_symlink(bdev->bd_holder_dir, &disk_to_dev(disk)->kobj);
- kobject_put(bdev->bd_holder_dir);
list_del_init(&holder->list);
kfree(holder);
}
--
2.30.2
--
dm-devel mailing list
dm-devel@redhat.com
https://listman.redhat.com/mailman/listinfo/dm-devel
next prev parent reply other threads:[~2021-07-25 6:00 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-07-25 5:54 [dm-devel] use regular gendisk registration in device mapper Christoph Hellwig
2021-07-25 5:54 ` [dm-devel] [PATCH 1/8] block: make the block holder code optional Christoph Hellwig
2021-07-29 16:25 ` Mike Snitzer
2021-07-25 5:54 ` Christoph Hellwig [this message]
2021-07-29 16:27 ` [dm-devel] [PATCH 2/8] block: remove the extra kobject reference in bd_link_disk_holder Mike Snitzer
2021-07-25 5:54 ` [dm-devel] [PATCH 3/8] block: look up holders by bdev Christoph Hellwig
2021-07-25 5:54 ` [dm-devel] [PATCH 4/8] block: support delayed holder registration Christoph Hellwig
2021-07-27 16:06 ` Mike Snitzer
2021-07-28 6:54 ` Christoph Hellwig
2021-07-29 16:32 ` Mike Snitzer
2021-07-25 5:54 ` [dm-devel] [PATCH 5/8] dm: cleanup cleanup_mapped_device Christoph Hellwig
2021-07-29 16:33 ` Mike Snitzer
2021-07-25 5:54 ` [dm-devel] [PATCH 6/8] dm: move setting md->type into dm_setup_md_queue Christoph Hellwig
2021-07-29 16:34 ` Mike Snitzer
2021-07-25 5:54 ` [dm-devel] [PATCH 7/8] dm: delay registering the gendisk Christoph Hellwig
2021-07-29 16:36 ` Mike Snitzer
2021-07-25 5:54 ` [dm-devel] [PATCH 8/8] block: remove support for delayed queue registrations Christoph Hellwig
2021-07-29 16:37 ` Mike Snitzer
2021-07-27 15:58 ` [dm-devel] use regular gendisk registration in device mapper Mike Snitzer
2021-07-27 16:02 ` Christoph Hellwig
2021-07-27 16:18 ` Mike Snitzer
2021-07-27 20:38 ` Milan Broz
2021-07-28 7:06 ` Christoph Hellwig
2021-07-28 8:37 ` Milan Broz
2021-07-28 11:24 ` Christoph Hellwig
2021-07-29 15:01 ` Milan Broz
2021-07-28 16:17 ` Mike Snitzer
2021-07-29 7:50 ` Milan Broz
2021-07-27 22:52 ` Mike Snitzer
2021-08-04 9:41 [dm-devel] use regular gendisk registration in device mapper v2 Christoph Hellwig
2021-08-04 9:41 ` [dm-devel] [PATCH 2/8] block: remove the extra kobject reference in bd_link_disk_holder Christoph Hellwig
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20210725055458.29008-3-hch@lst.de \
--to=hch@lst.de \
--cc=axboe@kernel.dk \
--cc=dm-devel@redhat.com \
--cc=linux-block@vger.kernel.org \
--cc=snitzer@redhat.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).