xfs: simplify /proc teardown & error handling
xfs: simplify /proc teardown & error handling

remove_proc_subtree() was added in 3.9, and can be
used to simplify our procfile creation error handling
and cleanup, removing the nested gotos.  It simply
removes fs/xfs and everything created under it.

Signed-off-by: Eric Sandeen <d55521028c14e0f378be5444e4ea388161c0d7e7@redhat.com>
Reviewed-by: Brian Foster <335646b5e374a776a6a2caca10969d6e3ec1cd2b@redhat.com>
Signed-off-by: Dave Chinner <aa743a0aaec8f7d7a1f01442503957f4d7a2d634@fromorbit.com>


KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs