func: static void blk_delete(BlockBackend *blk)
  
  {
  
      assert(!blk->refcnt);
  
      assert(!blk->name);
  
      assert(!blk->dev);
  
  
  
  
      if (blk->root) {
  
          blk_remove_bs(blk);
  
  
      assert(QLIST_EMPTY(&blk->remove_bs_notifiers.notifiers));
  
      assert(QLIST_EMPTY(&blk->insert_bs_notifiers.notifiers));
  
      QTAILQ_REMOVE(&block_backends, blk, link);
  
      drive_info_del(blk->legacy_dinfo);
  
      block_acct_cleanup(&blk->stats);
  
      g_free(blk);
  