From 2f99cc6e4688faf5f03f9afe5e1c6097278c75b2 Mon Sep 17 00:00:00 2001
From: Al Viro <viro@zeniv.linux.org.uk>
Date: Sat, 16 Jan 2010 14:10:21 -0500
Subject: [PATCH] add several pieces to shared subtree documentation

* document locking
* add the missing part of data structure invariants (relationship
between mnt_share and mnt_slave lists in case of a peer group
among slaves).

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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