From: Sergei Shtylyov <sergei.shtylyov@gmail.com>
To: Christoph Hellwig <hch@lst.de>, Jens Axboe <axboe@kernel.dk>
Cc: Josef Bacik <josef@toxicpanda.com>,
Minchan Kim <minchan@kernel.org>,
Stefan Haberland <sth@linux.ibm.com>,
Jan Hoeppner <hoeppner@linux.ibm.com>,
Joseph Qi <joseph.qi@linux.alibaba.com>,
"Rafael J. Wysocki" <rjw@rjwysocki.net>,
Pavel Machek <pavel@ucw.cz>, Len Brown <len.brown@intel.com>,
Andrew Morton <akpm@linux-foundation.org>,
linux-kernel@vger.kernel.org, nbd@other.debian.org,
linux-ide@vger.kernel.org, linux-s390@vger.kernel.org,
linux-fsdevel@vger.kernel.org, ocfs2-devel@oss.oracle.com,
linux-pm@vger.kernel.org, linux-mm@kvack.org,
linux-block@vger.kernel.org
Subject: Re: [PATCH 02/14] block: switch register_disk to use blkdev_get_by_dev
Date: Fri, 18 Sep 2020 11:52:39 +0300
Message-ID: <091931b1-eb9c-e45e-c9e8-501554618508@gmail.com> (raw)
In-Reply-To: <20200917165720.3285256-3-hch@lst.de>
Hello!
On 17.09.2020 19:57, Christoph Hellwig wrote:
> Use blkdev_get_by_dev instead of open coding it using bdget_disk +
> blkdev_get.
I don't see where you are removing bdget_disk() call (situated just before
the below code?)...
> Signed-off-by: Christoph Hellwig <hch@lst.de>
> ---
> block/genhd.c | 7 +++----
> 1 file changed, 3 insertions(+), 4 deletions(-)
>
> diff --git a/block/genhd.c b/block/genhd.c
> index 7b56203c90a303..f778716fac6cde 100644
> --- a/block/genhd.c
> +++ b/block/genhd.c
> @@ -732,10 +732,9 @@ static void register_disk(struct device *parent, struct gendisk *disk,
> goto exit;
>
> set_bit(GD_NEED_PART_SCAN, &disk->state);
> - err = blkdev_get(bdev, FMODE_READ, NULL);
> - if (err < 0)
> - goto exit;
> - blkdev_put(bdev, FMODE_READ);
> + bdev = blkdev_get_by_dev(disk_devt(disk), FMODE_READ, NULL);
> + if (!IS_ERR(bdev))
> + blkdev_put(bdev, FMODE_READ);
>
> exit:
> /* announce disk after possible partitions are created */
MBR, Sergei
next prev parent reply index
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-17 16:57 remove blkdev_get as a public API Christoph Hellwig
2020-09-17 16:57 ` [PATCH 01/14] block: move the NEED_PART_SCAN flag to struct gendisk Christoph Hellwig
2020-09-24 8:56 ` Jan Kara
2020-09-17 16:57 ` [PATCH 02/14] block: switch register_disk to use blkdev_get_by_dev Christoph Hellwig
2020-09-18 8:52 ` Sergei Shtylyov [this message]
2020-09-19 5:15 ` Christoph Hellwig
2020-09-17 16:57 ` [PATCH 03/14] block: cleanup blkdev_bszset Christoph Hellwig
2020-09-17 16:57 ` [PATCH 04/14] pktcdvd: remove the if 0'ed pkt_start_recovery function Christoph Hellwig
2020-09-17 16:57 ` [PATCH 05/14] pktcdvd: use blkdev_get_by_dev instead of open coding it Christoph Hellwig
2020-09-17 16:57 ` [PATCH 06/14] zram: cleanup backing_dev_store Christoph Hellwig
2020-09-17 16:57 ` [PATCH 07/14] raw: don't keep unopened block device around Christoph Hellwig
2020-09-17 16:57 ` [PATCH 08/14] dasd: cleanup dasd_scan_partitions Christoph Hellwig
2020-09-17 16:57 ` [PATCH 09/14] ocfs2: cleanup o2hb_region_dev_store Christoph Hellwig
2020-09-18 2:11 ` Joseph Qi
2020-09-17 16:57 ` [PATCH 10/14] mm: cleanup claim_swapfile Christoph Hellwig
2020-09-17 16:57 ` [PATCH 11/14] PM: rewrite is_hibernate_resume_dev to not require an inode Christoph Hellwig
2020-09-17 17:26 ` Rafael J. Wysocki
2020-09-19 9:06 ` Pavel Machek
2020-09-17 16:57 ` [PATCH 12/14] mm: split swap_type_of Christoph Hellwig
2020-09-17 16:57 ` [PATCH 13/14] PM: mm: cleanup swsusp_swap_check Christoph Hellwig
2020-09-18 16:01 ` Rafael J. Wysocki
2020-09-19 9:06 ` Pavel Machek
2020-09-17 16:57 ` [PATCH 14/14] block: mark blkdev_get static 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=091931b1-eb9c-e45e-c9e8-501554618508@gmail.com \
--to=sergei.shtylyov@gmail.com \
--cc=akpm@linux-foundation.org \
--cc=axboe@kernel.dk \
--cc=hch@lst.de \
--cc=hoeppner@linux.ibm.com \
--cc=josef@toxicpanda.com \
--cc=joseph.qi@linux.alibaba.com \
--cc=len.brown@intel.com \
--cc=linux-block@vger.kernel.org \
--cc=linux-fsdevel@vger.kernel.org \
--cc=linux-ide@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mm@kvack.org \
--cc=linux-pm@vger.kernel.org \
--cc=linux-s390@vger.kernel.org \
--cc=minchan@kernel.org \
--cc=nbd@other.debian.org \
--cc=ocfs2-devel@oss.oracle.com \
--cc=pavel@ucw.cz \
--cc=rjw@rjwysocki.net \
--cc=sth@linux.ibm.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
Linux-Block Archive on lore.kernel.org
Archives are clonable:
git clone --mirror https://lore.kernel.org/linux-block/0 linux-block/git/0.git
# If you have public-inbox 1.1+ installed, you may
# initialize and index your mirror using the following commands:
public-inbox-init -V2 linux-block linux-block/ https://lore.kernel.org/linux-block \
linux-block@vger.kernel.org
public-inbox-index linux-block
Example config snippet for mirrors
Newsgroup available over NNTP:
nntp://nntp.lore.kernel.org/org.kernel.vger.linux-block
AGPL code for this site: git clone https://public-inbox.org/public-inbox.git