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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	[thread overview]
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

WARNING: multiple messages have this Message-ID (diff)
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: [Ocfs2-devel] [PATCH 02/14] block: switch register_disk to use blkdev_get_by_dev
Date: Fri, 18 Sep 2020 11:52:39 +0300	[thread overview]
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

  reply	other threads:[~2020-09-18  8:52 UTC|newest]

Thread overview: 50+ 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 ` [Ocfs2-devel] " Christoph Hellwig
2020-09-17 16:57 ` [PATCH 01/14] block: move the NEED_PART_SCAN flag to struct gendisk Christoph Hellwig
2020-09-17 16:57   ` [Ocfs2-devel] " Christoph Hellwig
2020-09-24  8:56   ` Jan Kara
2020-09-24  8:56     ` [Ocfs2-devel] " Jan Kara
2020-09-17 16:57 ` [PATCH 02/14] block: switch register_disk to use blkdev_get_by_dev Christoph Hellwig
2020-09-17 16:57   ` [Ocfs2-devel] " Christoph Hellwig
2020-09-18  8:52   ` Sergei Shtylyov [this message]
2020-09-18  8:52     ` Sergei Shtylyov
2020-09-19  5:15     ` Christoph Hellwig
2020-09-19  5:15       ` [Ocfs2-devel] " Christoph Hellwig
2020-09-17 16:57 ` [PATCH 03/14] block: cleanup blkdev_bszset Christoph Hellwig
2020-09-17 16:57   ` [Ocfs2-devel] " 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   ` [Ocfs2-devel] " 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   ` [Ocfs2-devel] " Christoph Hellwig
2020-09-17 16:57 ` [PATCH 06/14] zram: cleanup backing_dev_store Christoph Hellwig
2020-09-17 16:57   ` [Ocfs2-devel] " 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   ` [Ocfs2-devel] " Christoph Hellwig
2020-09-17 16:57 ` [PATCH 08/14] dasd: cleanup dasd_scan_partitions Christoph Hellwig
2020-09-17 16:57   ` [Ocfs2-devel] " Christoph Hellwig
2020-09-17 16:57 ` [PATCH 09/14] ocfs2: cleanup o2hb_region_dev_store Christoph Hellwig
2020-09-17 16:57   ` [Ocfs2-devel] " Christoph Hellwig
2020-09-18  2:11   ` Joseph Qi
2020-09-18  2:11     ` [Ocfs2-devel] " Joseph Qi
2020-09-17 16:57 ` [PATCH 10/14] mm: cleanup claim_swapfile Christoph Hellwig
2020-09-17 16:57   ` [Ocfs2-devel] " 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 16:57   ` [Ocfs2-devel] " Christoph Hellwig
2020-09-17 17:26   ` Rafael J. Wysocki
2020-09-17 17:26     ` Rafael J. Wysocki
2020-09-17 17:26     ` [Ocfs2-devel] " Rafael J. Wysocki
2020-09-17 17:26     ` Rafael J. Wysocki
2020-09-19  9:06   ` Pavel Machek
2020-09-19  9:06     ` [Ocfs2-devel] " Pavel Machek
2020-09-17 16:57 ` [PATCH 12/14] mm: split swap_type_of Christoph Hellwig
2020-09-17 16:57   ` [Ocfs2-devel] " Christoph Hellwig
2020-09-17 16:57 ` [PATCH 13/14] PM: mm: cleanup swsusp_swap_check Christoph Hellwig
2020-09-17 16:57   ` [Ocfs2-devel] " Christoph Hellwig
2020-09-18 16:01   ` Rafael J. Wysocki
2020-09-18 16:01     ` Rafael J. Wysocki
2020-09-18 16:01     ` [Ocfs2-devel] " Rafael J. Wysocki
2020-09-18 16:01     ` Rafael J. Wysocki
2020-09-19  9:06   ` Pavel Machek
2020-09-19  9:06     ` [Ocfs2-devel] " Pavel Machek
2020-09-17 16:57 ` [PATCH 14/14] block: mark blkdev_get static Christoph Hellwig
2020-09-17 16:57   ` [Ocfs2-devel] " Christoph Hellwig

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