[Qemu-devel] [PATCHv2 5/5] virtio-blk: remove layout assumption

["Michael S. Tsirkin" <mst@redhat.com>]

Use container_of to remove assumption that vdev
is 1st member of device state.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
 hw/virtio-blk.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/hw/virtio-blk.c b/hw/virtio-blk.c
index 5f61469..ab52d1d 100644
--- a/hw/virtio-blk.c
+++ b/hw/virtio-blk.c
@@ -32,7 +32,7 @@ typedef struct VirtIOBlock
 
 static VirtIOBlock *to_virtio_blk(VirtIODevice *vdev)
 {
-    return (VirtIOBlock *)vdev;
+    return container_of(vdev, VirtIOBlock, vdev);
 }
 
 typedef struct VirtIOBlockReq
-- 
1.7.0.2.280.gc6f05