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Subject: Re: Change in register_blkdev() behavior
To: Greg KH <gregkh@linuxfoundation.org>
Cc: logang@deltatee.com, axboe@kernel.dk, jlayton@poochiereds.net,
 bfields@fieldses.org, linux-kernel@vger.kernel.org
References: <a01cedbc-ca1a-3e3d-cf2c-3e995c63f793@csail.mit.edu>
 <20180131142403.GB9233@kroah.com>
From: "Srivatsa S. Bhat" <srivatsa@csail.mit.edu>
Message-ID: <2c9a88ae-89e5-e89e-ade3-3eebd2a26a85@csail.mit.edu>
Date: Thu, 1 Feb 2018 16:25:08 -0800
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On 1/31/18 6:24 AM, Greg KH wrote:
> On Tue, Jan 30, 2018 at 04:56:32PM -0800, Srivatsa S. Bhat wrote:
>>
>> Hi,
>>
>> Before commit 133d55cdb2f "block: order /proc/devices by major number",
>> if register_blkdev() was called with major = [1..UINT_MAX], it used to
>> succeed (provided the requested major number was actually free).
> 
> How was LTP calling register_blkdev() with such crazy numbers?
> 

Haha :-) No idea!

> Anyway, I agree with Logan, this sounds like something to be resolved in
> LTP, as allowing block devices with numbers greater than the number we
> really allow seems like an odd requirement :)
> 

Agreed! And thanks for confirming!

Regards,
Srivatsa