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Date:   Tue, 6 Jul 2021 07:43:22 +0200
From:   Christoph Hellwig <hch@lst.de>
To:     Tetsuo Handa <penguin-kernel@i-love.sakura.ne.jp>
Cc:     Arjan van de Ven <arjan@linux.intel.com>,
        Alexander Viro <viro@zeniv.linux.org.uk>,
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        Pavel Tatashin <pasha.tatashin@soleen.com>,
        Tyler Hicks <tyhicks@linux.microsoft.com>,
        Christoph Hellwig <hch@lst.de>
Subject: Re: [PATCH] loop: reintroduce global lock for safe
 loop_validate_file() traversal
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On Sun, Jul 04, 2021 at 02:42:10PM +0900, Tetsuo Handa wrote:
> It is not clear why the size of old and new image files need to be the same.

To simplify things.  And given that no one is asking for lifting the
restriction I'd rather not make the code even more hairy.