io_uring: move POLLFREE handling to separate function

We really don't care about this at all in terms of performance. Outside
of having it already be marked unlikely(), shove it into a separate
__cold function.
Signed-off-by: Jens Axboe <axboe@kernel.dk>

io_uring/poll.c

@@ -325,14 +325,8 @@ static void io_poll_cancel_req(struct io_kiocb *req)
 
 #define IO_ASYNC_POLL_COMMON	(EPOLLONESHOT | EPOLLPRI)
 
-static int io_poll_wake(struct wait_queue_entry *wait, unsigned mode, int sync,
-			void *key)
+static __cold int io_pollfree_wake(struct io_kiocb *req, struct io_poll *poll)
 {
-	struct io_kiocb *req = wqe_to_req(wait);
-	struct io_poll *poll = container_of(wait, struct io_poll, wait);
-	__poll_t mask = key_to_poll(key);
-
-	if (unlikely(mask & POLLFREE)) {
 	io_poll_mark_cancelled(req);
 	/* we have to kick tw in case it's not already */
 	io_poll_execute(req, 0);
@@ -354,7 +348,17 @@ static int io_poll_wake(struct wait_queue_entry *wait, unsigned mode, int sync,
 	 */
 	smp_store_release(&poll->head, NULL);
 	return 1;
-	}
+}
+
+static int io_poll_wake(struct wait_queue_entry *wait, unsigned mode, int sync,
+			void *key)
+{
+	struct io_kiocb *req = wqe_to_req(wait);
+	struct io_poll *poll = container_of(wait, struct io_poll, wait);
+	__poll_t mask = key_to_poll(key);
+
+	if (unlikely(mask & POLLFREE))
+		return io_pollfree_wake(req, poll);
 
 	/* for instances that support it check for an event match first */
 	if (mask && !(mask & (poll->events & ~IO_ASYNC_POLL_COMMON)))