UPSTREAM: io_uring: pass in EPOLL_URING_WAKE for eventfd signaling and wakeups

[ Upstream commit 44648532 ]

Pass in EPOLL_URING_WAKE when signaling eventfd or doing poll related
wakups, so that we can check for a circular event dependency between
eventfd and epoll. If this flag is set when our wakeup handlers are
called, then we know we have a dependency that needs to terminate
multishot requests.

eventfd and epoll are the only such possible dependencies.

Bug: 268174392
Cc: stable@vger.kernel.org # 6.0
Change-Id: I6e45fa1484657bd5caad007783785c2ee97a9929
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
(cherry picked from commit 189556b0)
Bug: 268174392
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>