From: Eric W. Biederman <ebiederm@xmission.com>
Date: Thu, 26 Jul 2012 12:15:35 +0000 (-0700)
Subject: userns: Implement unshare of the user namespace
X-Git-Tag: v3.8-rc1~77^2~6
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=b2e0d98705e60e45bbb3c0032c48824ad7ae0704;p=pandora-kernel.git

userns: Implement unshare of the user namespace

- Add CLONE_THREAD to the unshare flags if CLONE_NEWUSER is selected
  As changing user namespaces is only valid if all there is only
  a single thread.
- Restore the code to add CLONE_VM if CLONE_THREAD is selected and
  the code to addCLONE_SIGHAND if CLONE_VM is selected.
  Making the constraints in the code clear.

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