func: void acpi_memory_unplug_cb(MemHotplugState *mem_st,
  
                             DeviceState *dev, Error **errp)
  
  {
  
      MemStatus *mdev;
  
  
  
      mdev = acpi_memory_slot_status(mem_st, dev, errp);
  
      if (!mdev) {
  
          return;
  
      }
  
  
  
      /* nvdimm device hot unplug is not supported yet. */
  
      assert(!object_dynamic_cast(OBJECT(dev), TYPE_NVDIMM));
  
      mdev->is_enabled = false;
  
      mdev->dimm = NULL;
  
  }
  