virtio_ring: add a struct device forward declaration

The virtio_ring header file uses the struct device without a forward
declaration.

Signed-off-by: Shunsuke Mie <mie@igel.co.jp>
Message-Id: <20230417022037.917668-1-mie@igel.co.jp>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

diff --git a/include/linux/virtio_ring.h b/include/linux/virtio_ring.h
index 2550c91..9b33df7 100644 (file)
--- a/include/linux/virtio_ring.h
+++ b/include/linux/virtio_ring.h
@@ -58,6 +58,7 @@ do { \
 
 struct virtio_device;
 struct virtqueue;
+struct device;
 
 /*
  * Creates a virtqueue and allocates the descriptor ring.  If