virtio_ring: rename vring_desc_extra_packed

Rename vring_desc_extra_packed to vring_desc_extra since the structure
are pretty generic which could be reused by split virtqueue as well.
Signed-off-by: Jason Wang <jasowang@redhat.com>
Link: https://lore.kernel.org/r/20210604055350.58753-3-jasowang@redhat.comSigned-off-by: Michael S. Tsirkin <mst@redhat.com>

drivers/virtio/virtio_ring.c

@@ -77,7 +77,7 @@ struct vring_desc_state_packed {
 	u16 last;			/* The last desc state in a list. */
 };
 
-struct vring_desc_extra_packed {
+struct vring_desc_extra {
 	dma_addr_t addr;		/* Buffer DMA addr. */
 	u32 len;			/* Buffer length. */
 	u16 flags;			/* Descriptor flags. */
@@ -169,7 +169,7 @@ struct vring_virtqueue {
 
 			/* Per-descriptor state. */
 			struct vring_desc_state_packed *desc_state;
-			struct vring_desc_extra_packed *desc_extra;
+			struct vring_desc_extra *desc_extra;
 
 			/* DMA address and size information */
 			dma_addr_t ring_dma_addr;
@@ -918,7 +918,7 @@ static struct virtqueue *vring_create_virtqueue_split(
  */
 
 static void vring_unmap_state_packed(const struct vring_virtqueue *vq,
-				     struct vring_desc_extra_packed *state)
+				     struct vring_desc_extra *state)
 {
 	u16 flags;
 
@@ -1658,13 +1658,13 @@ static struct virtqueue *vring_create_virtqueue_packed(
 	vq->free_head = 0;
 
 	vq->packed.desc_extra = kmalloc_array(num,
-			sizeof(struct vring_desc_extra_packed),
+			sizeof(struct vring_desc_extra),
 			GFP_KERNEL);
 	if (!vq->packed.desc_extra)
 		goto err_desc_extra;
 
 	memset(vq->packed.desc_extra, 0,
-		num * sizeof(struct vring_desc_extra_packed));
+		num * sizeof(struct vring_desc_extra));
 
 	for (i = 0; i < num - 1; i++)
 		vq->packed.desc_extra[i].next = i + 1;