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Date:   Tue, 23 May 2023 18:02:44 +0200
From:   Christoph Hellwig <hch@lst.de>
To:     Matthew Wilcox <willy@infradead.org>
Cc:     "Darrick J. Wong" <djwong@kernel.org>,
        Christoph Hellwig <hch@lst.de>, Jens Axboe <axboe@kernel.dk>,
        Xiubo Li <xiubli@redhat.com>,
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        Alexander Viro <viro@zeniv.linux.org.uk>,
        Christian Brauner <brauner@kernel.org>,
        Theodore Ts'o <tytso@mit.edu>,
        Jaegeuk Kim <jaegeuk@kernel.org>, Chao Yu <chao@kernel.org>,
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        Trond Myklebust <trond.myklebust@hammerspace.com>,
        Anna Schumaker <anna@kernel.org>,
        Damien Le Moal <dlemoal@kernel.org>,
        Andrew Morton <akpm@linux-foundation.org>,
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        NeilBrown <neilb@suse.de>
Subject: Re: [PATCH 08/13] iomap: assign current->backing_dev_info in
 iomap_file_buffered_write
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On Tue, May 23, 2023 at 04:30:51AM +0100, Matthew Wilcox wrote:
> AFAICT (the code went through some metamorphoses in the intervening
> twenty years), the last use of it ended up in current_may_throttle(),
> and it was removed in March 2022 by Neil Brown in commit b9b1335e6403.
> Since then, there have been no users of task->backing_dev_info, and I'm
> pretty sure it can go away.

Oh, nice.  I hadn't noticed it finally went away.  The next iteration
of the series will just remove it.