diff --git a/block.c b/block.c
index bb322df..499b147 100644
--- a/block.c
+++ b/block.c
@@ -8491,8 +8491,8 @@
     return found;
 }
 
-static BlockDriverState *bdrv_do_skip_filters(BlockDriverState *bs,
-                                              bool stop_on_explicit_filter)
+static BlockDriverState * GRAPH_RDLOCK
+bdrv_do_skip_filters(BlockDriverState *bs, bool stop_on_explicit_filter)
 {
     BdrvChild *c;
 
diff --git a/include/block/block_int-io.h b/include/block/block_int-io.h
index 4e7bf57..17547a2 100644
--- a/include/block/block_int-io.h
+++ b/include/block/block_int-io.h
@@ -131,8 +131,8 @@
 bdrv_refresh_total_sectors(BlockDriverState *bs, int64_t hint);
 
 BdrvChild *bdrv_cow_child(BlockDriverState *bs);
-BdrvChild *bdrv_filter_child(BlockDriverState *bs);
-BdrvChild *bdrv_filter_or_cow_child(BlockDriverState *bs);
+BdrvChild * GRAPH_RDLOCK bdrv_filter_child(BlockDriverState *bs);
+BdrvChild * GRAPH_RDLOCK bdrv_filter_or_cow_child(BlockDriverState *bs);
 BdrvChild * GRAPH_RDLOCK bdrv_primary_child(BlockDriverState *bs);
 BlockDriverState * GRAPH_RDLOCK bdrv_skip_filters(BlockDriverState *bs);
 BlockDriverState * GRAPH_RDLOCK bdrv_backing_chain_next(BlockDriverState *bs);