io_uring: pass in EPOLL_URING_WAKE for eventfd signaling and wakeups

io_uring: pass in EPOLL_URING_WAKE for eventfd signaling and wakeups

[ Upstream commit ba912152bf12e8bfbe909066f55d680f8ef2c5cd ]

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.

Cc: stable@vger.kernel.org # 6.0
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Sasha Levin <sashal@kernel.org>