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From: David Vrabel <david.vrabel@citrix.com>
To: Alexander Viro <viro@zeniv.linux.org.uk>
CC: David Vrabel <david.vrabel@citrix.com>, <linux-fsdevel@vger.kernel.org>,
        <linux-kernel@vger.kernel.org>, <xen-devel@lists.xenproject.org>,
        "Boris Ostrovsky" <boris.ostrovsky@oracle.com>,
        Juergen Gross <jgross@suse.com>
Subject: libfs,xenfs: replace /proc/xen/xenbus with a symlink
Date: Tue, 17 May 2016 11:27:21 +0100
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Using /proc/xen/xenbus can cause deadlocks on the atomic file position
mutex since this file should behave like a character device and not a
regular file.  This is easiest to achive by making it a symlink to the
existing /dev/xen/xenbus device.

This requires extending simple_fill_super() to add symlinks as well as
regular files.

David