Hi Andrew,

On Wed, 13 Dec 2017 17:03:00 -0800 Andrew Morton <akpm@linux-foundation.org> wrote:
>
> I'm probably sitting on an older version.  I've dropped
> 
> epoll: use the waitqueue lock to protect ep->wq
> sched/wait: assert the wait_queue_head lock is held in __wake_up_common

Dropped from linux-next as well.

-- 
Cheers,
Stephen Rothwell