From af4b8a83add95ef40716401395b44a1b579965f4 Mon Sep 17 00:00:00 2001
From: "Eric W. Biederman" <ebiederm@xmission.com>
Date: Wed, 1 Aug 2012 15:03:42 -0700
Subject: [PATCH] pidns: Wait in zap_pid_ns_processes until pid_ns->nr_hashed
 == 1

Looking at pid_ns->nr_hashed is a bit simpler and it works for
disjoint process trees that an unshare or a join of a pid_namespace
may create.

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