vhost: annotate vhost_poll

its ->mask is POLL... bitmap
Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>

drivers/vhost/vhost.c

@@ -187,7 +187,7 @@ EXPORT_SYMBOL_GPL(vhost_work_init);
 
 /* Init poll structure */
 void vhost_poll_init(struct vhost_poll *poll, vhost_work_fn_t fn,
-		     unsigned long mask, struct vhost_dev *dev)
+		     __poll_t mask, struct vhost_dev *dev)
 {
 	init_waitqueue_func_entry(&poll->wait, vhost_poll_wakeup);
 	init_poll_funcptr(&poll->table, vhost_poll_func);

drivers/vhost/vhost.h

@@ -34,7 +34,7 @@ struct vhost_poll {
 	wait_queue_head_t        *wqh;
 	wait_queue_entry_t              wait;
 	struct vhost_work	  work;
-	unsigned long		  mask;
+	__poll_t		  mask;
 	struct vhost_dev	 *dev;
 };
 
@@ -43,7 +43,7 @@ void vhost_work_queue(struct vhost_dev *dev, struct vhost_work *work);
 bool vhost_has_work(struct vhost_dev *dev);
 
 void vhost_poll_init(struct vhost_poll *poll, vhost_work_fn_t fn,
-		     unsigned long mask, struct vhost_dev *dev);
+		     __poll_t mask, struct vhost_dev *dev);
 int vhost_poll_start(struct vhost_poll *poll, struct file *file);
 void vhost_poll_stop(struct vhost_poll *poll);
 void vhost_poll_flush(struct vhost_poll *poll);