block: make bdrv_delete() static

Manage BlockDriverState lifecycle with refcnt, so bdrv_delete() is no
longer public and should be called by bdrv_unref() if refcnt is
decreased to 0.

This is an identical change because effectively, there's no multiple
reference of BDS now: no caller of bdrv_ref() yet, only bdrv_new() sets
bs->refcnt to 1, so all bdrv_unref() now actually delete the BDS.

Signed-off-by: Fam Zheng <famz@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/block/cow.c b/block/cow.c
index 1cc2e89c7c..767639c8d1 100644
--- a/block/cow.c
+++ b/block/cow.c
@@ -314,7 +314,7 @@ static int cow_create(const char *filename, QEMUOptionParameter *options)
     }
 
 exit:
-    bdrv_delete(cow_bs);
+    bdrv_unref(cow_bs);
     return ret;
 }