libfs,xenfs: replace /proc/xen/xenbus with a symlink

From	David Vrabel <david.vrabel@citrix.com>
Newsgroups	linux.kernel
Subject	libfs,xenfs: replace /proc/xen/xenbus with a symlink
Date	2016-05-17 12:30 +0200
Message-ID	<rzKqe-3kb-15@gated-at.bofh.it> (permalink)
Organization	linux.* mail to news gateway

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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

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libfs,xenfs: replace /proc/xen/xenbus with a symlink David Vrabel <david.vrabel@citrix.com> - 2016-05-17 12:30 +0200
  [PATCHv1 2/2] xenfs: replace xenbus and privcmd with symlinks David Vrabel <david.vrabel@citrix.com> - 2016-05-17 12:30 +0200
  [PATCHv1 1/2] libfs: allow simple_fill_super() to add symlinks David Vrabel <david.vrabel@citrix.com> - 2016-05-17 12:30 +0200

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