From: Christoph Hellwig <hch@lst.de>
Subject: iomap preparations for GFS2 v3
Date: Tue, 19 Jun 2018 18:41:30 +0200
Message-ID: <20180619164137.13720-1-hch@lst.de>
Cc: linux-fsdevel@vger.kernel.org, cluster-devel@redhat.com,
	Dan Williams <dan.j.williams@intel.com>, linux-ext4@vger.kernel.org
To: Andreas Gruenbacher <agruenba@redhat.com>, linux-xfs@vger.kernel.org
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Hi all,

this is a slight rework of the patches from Andreas to prepare for gfs2
using the iomap code.

Note: I'd like to start with an immutable branch for iomap patches in either
the XFS tree or a tree of mine at the beginning of the merge window so that
we have a common base for the GFS2 and XFS iomap work.

Changes since v2:
 - add another patch from Andreas to provide private data for the file
   system
 - revert the unioning of bdev and dax_dev for now, needs further work

Changes since v1:
 - move code to a different spot in iomap.c to prefer for readpages
   inline data support
 - add a forward declaration for struct page to iomap.h
 - fix a typo in the dax_dev/bdev unioning
 - fix a comment typo