Linux-libre 4.2-gnu

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diff --git a/Documentation/filesystems/aufs/design/08shwh.txt b/Documentation/filesystems/aufs/design/08shwh.txt
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-
-# Copyright (C) 2005-2015 Junjiro R. Okajima
-# 
-# This program is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 2 of the License, or
-# (at your option) any later version.
-# 
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-# 
-# You should have received a copy of the GNU General Public License
-# along with this program.  If not, see <http://www.gnu.org/licenses/>.
-
-Show Whiteout Mode (shwh)
-----------------------------------------------------------------------
-Generally aufs hides the name of whiteouts. But in some cases, to show
-them is very useful for users. For instance, creating a new middle layer
-(branch) by merging existing layers.
-
-(borrowing aufs1 HOW-TO from a user, Michael Towers)
-When you have three branches,
-- Bottom: 'system', squashfs (underlying base system), read-only
-- Middle: 'mods', squashfs, read-only
-- Top: 'overlay', ram (tmpfs), read-write
-
-The top layer is loaded at boot time and saved at shutdown, to preserve
-the changes made to the system during the session.
-When larger changes have been made, or smaller changes have accumulated,
-the size of the saved top layer data grows. At this point, it would be
-nice to be able to merge the two overlay branches ('mods' and 'overlay')
-and rewrite the 'mods' squashfs, clearing the top layer and thus
-restoring save and load speed.
-
-This merging is simplified by the use of another aufs mount, of just the
-two overlay branches using the 'shwh' option.
-# mount -t aufs -o ro,shwh,br:/livesys/overlay=ro+wh:/livesys/mods=rr+wh \
-	aufs /livesys/merge_union
-
-A merged view of these two branches is then available at
-/livesys/merge_union, and the new feature is that the whiteouts are
-visible!
-Note that in 'shwh' mode the aufs mount must be 'ro', which will disable
-writing to all branches. Also the default mode for all branches is 'ro'.
-It is now possible to save the combined contents of the two overlay
-branches to a new squashfs, e.g.:
-# mksquashfs /livesys/merge_union /path/to/newmods.squash
-
-This new squashfs archive can be stored on the boot device and the
-initramfs will use it to replace the old one at the next boot.