Re: waitqueue lockdep annotation

[Christoph Hellwig]

On Thu, Nov 30, 2017 at 04:38:02PM -0500, Jason Baron wrote:
> I don't think there is a bug here. The 'wake_up_locked()' calls in epoll
> are being protected by the ep->lock, not the wait_queue_head lock. So
> arguably the 'annotation' is wrong, but I don't think there is a bug
> beyond that.

They can't be protected by ep->lock.  The file might as well be
watched for using poll or select as well, or just using epoll using
another epoll fd.