Re: Suspicious QOM types without instance/class size

[Cornelia Huck]

On Thu, 20 Aug 2020 17:55:29 -0400
Eduardo Habkost <ehabkost@redhat.com> wrote:

> While trying to convert TypeInfo declarations to the new
> OBJECT_DECLARE* macros, I've stumbled on a few suspicious cases
> where instance_size or class_size is not set, despite having type
> checker macros that use a specific type.
> 
> The ones with "WARNING" are abstract types (maybe not serious if
> subclasses set the appropriate sizes).  The ones with "ERROR"
> don't seem to be abstract types.
> 
> ERROR: hw/s390x/virtio-ccw.c:1237:1: class_size should be set to 
> sizeof(VirtioCcwBusClass)?
> ERROR: hw/virtio/virtio-pci.c:2101:1: class_size should be set to 
> sizeof(VirtioPCIBusClass)?

VirtioCcwBusClass and VirtioPCIBusClass are both simple typedefs of
VirtioBusClass (it's likely that I copied the ccw definition from the
pci one). virtio-mmio instead uses VirtioBusClass directly in its
checker macros.

I don't see a real reason for the typedefs, maybe ccw and pci should
use the mmio approach as well?