func: BlockAIOCB *bdrv_aio_write_zeroes(BlockDriverState *bs,
  
          int64_t sector_num, int nb_sectors, BdrvRequestFlags flags,
  
          BlockCompletionFunc *cb, void *opaque)
  
  {
  
      trace_bdrv_aio_write_zeroes(bs, sector_num, nb_sectors, flags, opaque);
  
  
  
      return bdrv_co_aio_rw_vector(bs, sector_num, NULL, nb_sectors,
  
                                   BDRV_REQ_ZERO_WRITE | flags,
  
                                   cb, opaque, true);
  
  }
  