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From: Christoph Hellwig <hch@lst.de>
Subject: RFC: dev_pagemap reference counting
Date: Mon,  4 Dec 2017 16:34:41 -0800
Message-Id: <20171205003443.22111-1-hch@lst.de>
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To: dan.j.williams@intel.com
Cc: linux-mm@kvack.org, linux-nvdimm@lists.01.org
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Hi Dan,

maybe I'm missing something, but it seems like we release the reference
to the previously found pgmap before passing it to get_dev_pagemap again.

Can you check if my findings make sense?

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