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-rw-r--r--block/cow.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/block/cow.c b/block/cow.c
index 9f94599661..1cc2e89c7c 100644
--- a/block/cow.c
+++ b/block/cow.c
@@ -340,6 +340,7 @@ static BlockDriver bdrv_cow = {
.bdrv_open = cow_open,
.bdrv_close = cow_close,
.bdrv_create = cow_create,
+ .bdrv_has_zero_init = bdrv_has_zero_init_1,
.bdrv_read = cow_co_read,
.bdrv_write = cow_co_write,