Mandeep Singh Baines wrote:

In cgroup_attach_proc it is now sufficient to only check that
oldcgrp==newcgrp once. Now that we are using threadgroup_lock()
during the migrations, oldcgrp will not change.

Signed-off-by: Mandeep Singh Baines <redacted>

Reviewed-by: Li Zefan <redacted>

Cc: Tejun Heo <redacted>
Cc: Li Zefan <redacted>
Cc: containers-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org
Cc: cgroups-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Cc: KAMEZAWA Hiroyuki <redacted>
Cc: Frederic Weisbecker <redacted>
Cc: Oleg Nesterov <redacted>
Cc: Andrew Morton <akpm-de/tnXTf+JLsfHDXvbKv3WD2FQJk+8+b@public.gmane.org>
Cc: Paul Menage <redacted>
---
 kernel/cgroup.c |   17 ++++++-----------
 1 files changed, 6 insertions(+), 11 deletions(-)