virtio_balloon: Use outer variable 'page'

There is no need to define a local variable 'page',
just use outer variable 'page'.

Signed-off-by: zhang jiao <[email protected]>
Message-Id: <[email protected]>
Signed-off-by: Michael S. Tsirkin <[email protected]>
Reviewed-by: David Hildenbrand <[email protected]>
Reviewed-by: Gavin Shan <[email protected]>

Author: zhang jiao

drivers/virtio/virtio_balloon.c

@@ -251,7 +251,7 @@ static unsigned int fill_balloon(struct virtio_balloon *vb, size_t num)
 
 	for (num_pfns = 0; num_pfns < num;
 	     num_pfns += VIRTIO_BALLOON_PAGES_PER_PAGE) {
-		struct page *page = balloon_page_alloc();
+		page = balloon_page_alloc();
 
 		if (!page) {
 			dev_info_ratelimited(&vb->vdev->dev,