block: Mark bdrv_has_zero_init() and callers GRAPH_RDLOCK

This adds GRAPH_RDLOCK annotations to declare that callers of
bdrv_has_zero_init() need to hold a reader lock for the graph because
it calls bdrv_filter_bs(), which accesses bs->file/backing.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Message-ID: <20231027155333.420094-3-kwolf@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/block.c b/block.c
index a527aa1..1171f47 100644
--- a/block.c
+++ b/block.c
@@ -6587,7 +6587,7 @@ int bdrv_has_zero_init_1(BlockDriverState *bs)
     return 1;
 }
 
-int bdrv_has_zero_init(BlockDriverState *bs)
+int coroutine_mixed_fn bdrv_has_zero_init(BlockDriverState *bs)
 {
     BlockDriverState *filtered;
     GLOBAL_STATE_CODE();