block: Convert bs->file to BdrvChild

This patch removes the temporary duplication between bs->file and
bs->file_child by converting everything to BdrvChild.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: Alberto Garcia <berto@igalia.com>
Reviewed-by: Fam Zheng <famz@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>

1 files changed, 1 insertions, 2 deletions

diff --git a/include/block/block_int.h b/include/block/block_int.h
index d0dd93e..98936c9 100644
--- a/include/block/block_int.h
+++ b/include/block/block_int.h
@@ -380,8 +380,7 @@ struct BlockDriverState {
 
     BlockDriverState *backing_hd;
     BdrvChild *backing_child;
-    BlockDriverState *file;
-    BdrvChild *file_child;
+    BdrvChild *file;
 
     NotifierList close_notifiers;