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Date:   Tue, 21 Apr 2020 17:03:54 +0200
From:   Christoph Hellwig <hch@lst.de>
To:     Stefan Haberland <sth@linux.ibm.com>
Cc:     Christoph Hellwig <hch@lst.de>,
        Jan Hoeppner <hoeppner@linux.ibm.com>,
        Jens Axboe <axboe@kernel.dk>,
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        Christian Borntraeger <borntraeger@de.ibm.com>,
        linux-s390@vger.kernel.org, linux-block@vger.kernel.org,
        linux-kernel@vger.kernel.org
Subject: Re: stop using ioctl_by_bdev in the s390 DASD driver
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On Tue, Apr 21, 2020 at 04:17:53PM +0200, Stefan Haberland wrote:
> I can imagine some ways to get rid of this ioctl_by_bdev. Maybe having a
> udev
> rule to add a partition from userspace or having the driver add the implicit
> partition at the end. Or maybe something else.
> 
> If it is OK I will have a look at this and discuss this issue with my
> colleagues and come up with a different approach.

Sure, we can wait a few days.  Note that I don't want to break existing
userspace, which kinda speaks against a udev solution.