vdpa: Mark vdpa_config_ops.get_vq_notification as optional

Since vhost_vdpa_mmap checks for its existence before calling it.

Signed-off-by: Eugenio Pérez <eperezma@redhat.com>
Link: https://lore.kernel.org/r/20211104195248.2088904-1-eperezma@redhat.com
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Reviewed-by: Stefano Garzarella <sgarzare@redhat.com>

diff --git a/include/linux/vdpa.h b/include/linux/vdpa.h
index ae34015b37b7b44c0015fdd24ed76b7f3e11fb93..2b7db96bb7d34d23c14d46460fbf6fdaac4d3182 100644 (file)
--- a/include/linux/vdpa.h
+++ b/include/linux/vdpa.h
@@ -157,7 +157,7 @@ struct vdpa_map_file {
  *                             @vdev: vdpa device
  *                             @idx: virtqueue index
  *                             @state: pointer to returned state (last_avail_idx)
- * @get_vq_notification:       Get the notification area for a virtqueue
+ * @get_vq_notification:       Get the notification area for a virtqueue (optional)
  *                             @vdev: vdpa device
  *                             @idx: virtqueue index
  *                             Returns the notifcation area