linux-ext4 - dax_supported() related cleanups v2

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Message-Id: <20210922173431.2454024-1-hch@lst.de>
Date:   Wed, 22 Sep 2021 19:34:28 +0200
From:   Christoph Hellwig <hch@....de>
To:     Dan Williams <dan.j.williams@...el.com>,
        Vishal Verma <vishal.l.verma@...el.com>,
        Dave Jiang <dave.jiang@...el.com>
Cc:     Mike Snitzer <snitzer@...hat.com>,
        Matthew Wilcox <willy@...radead.org>,
        linux-xfs@...r.kernel.org, nvdimm@...ts.linux.dev,
        linux-fsdevel@...r.kernel.org, linux-ext4@...r.kernel.org
Subject: dax_supported() related cleanups v2

Hi all,

this series first clarifies how to use fsdax in the Kconfig help a bit,
and then untangles the code path that checks if fsdax is supported.

Changes since v1:
 - improve the FS_DAX Kconfig help text further
 - write a proper commit log for a patch missing it

Diffstat
 drivers/dax/super.c   |  191 +++++++++++++++++++-------------------------------
 drivers/md/dm-table.c |    9 --
 drivers/md/dm.c       |    2 
 fs/Kconfig            |   21 ++++-
 fs/ext2/super.c       |    3 
 fs/ext4/super.c       |    3 
 fs/xfs/xfs_super.c    |   16 +++-
 include/linux/dax.h   |   41 +---------
 8 files changed, 117 insertions(+), 169 deletions(-)