We'll need get non-const child pointer for graph modifications in
further commits.

Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@yandex-team.ru>
---
 block/block-backend.c                       | 2 +-
 include/sysemu/block-backend-global-state.h | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/block/block-backend.c b/block/block-backend.c
index db6f9b92a3..71d5002198 100644
--- a/block/block-backend.c
+++ b/block/block-backend.c
@@ -2879,7 +2879,7 @@ int coroutine_fn blk_co_copy_range(BlockBackend *blk_in, int64_t off_in,
                               bytes, read_flags, write_flags);
 }
 
-const BdrvChild *blk_root(BlockBackend *blk)
+BdrvChild *blk_root(BlockBackend *blk)
 {
     GLOBAL_STATE_CODE();
     return blk->root;
diff --git a/include/sysemu/block-backend-global-state.h b/include/sysemu/block-backend-global-state.h
index 49c12b0fa9..ccb35546a1 100644
--- a/include/sysemu/block-backend-global-state.h
+++ b/include/sysemu/block-backend-global-state.h
@@ -126,7 +126,7 @@ void blk_set_force_allow_inactivate(BlockBackend *blk);
 bool blk_register_buf(BlockBackend *blk, void *host, size_t size, Error **errp);
 void blk_unregister_buf(BlockBackend *blk, void *host, size_t size);
 
-const BdrvChild *blk_root(BlockBackend *blk);
+BdrvChild *blk_root(BlockBackend *blk);
 
 int blk_make_empty(BlockBackend *blk, Error **errp);
 
-- 
2.34.1