From 3c0a6163688b8ca3f44029c7bdb3d91a865c878a Mon Sep 17 00:00:00 2001
From: Al Viro <viro@zeniv.linux.org.uk>
Date: Wed, 18 Jul 2012 17:32:50 +0400
Subject: [PATCH] unobfuscate follow_up() a bit

really convoluted test in there has grown up during struct mount
introduction; what it checks is that we'd reached the root of
mount tree.
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Reading git-format-patch failed