From: Eric W. Biederman <ebiederm@xmission.com>
Date: Thu, 17 Nov 2011 05:59:43 +0000 (-0800)
Subject: userns: Add an explicit reference to the parent user namespace
X-Git-Tag: v3.5-rc1~107^2~38
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=aeb3ae9da9b50a386b22af786d19b623e8d9f0fa;p=pandora-kernel.git

userns: Add an explicit reference to the parent user namespace

I am about to remove the struct user_namespace reference from struct user_struct.
So keep an explicit track of the parent user namespace.

Take advantage of this new reference and replace instances of user_ns->creator->user_ns
with user_ns->parent.

Acked-by: Serge Hallyn <serge.hallyn@canonical.com>
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
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