Hi all, this series adds a strategic lockdep_assert_held to __wake_up_common to ensure callers really do hold the wait_queue_head lock when calling the unlocked wake_up variants. It turns out epoll did not do this for a fairly common path (hit all the time by systemd during bootup), so the second patch fixed this instance as well.
Changes since V2: - various typo fixes - updated comments in epoll to always refer to ep->wq.lock - add the new userfaultd patch from Matthew Changes since V1: - remove eq->lock in epoll
