Re: [PATCH v2] ppc/pnv: Make PnvXScomInterface an incomplete type

["Philippe Mathieu-Daudé" <philmd@redhat.com>]

On 12/11/19 5:04 PM, Greg Kurz wrote:
> PnvXScomInterface is an interface instance. It should never be
> dereferenced. Drop the dummy type definition for extra safety,
> which is the common practice with QOM interfaces.
> 
> While here also convert the bogus OBJECT_CHECK() to INTERFACE_CHECK().
> 
> Signed-off-by: Greg Kurz <groug@kaod.org>

Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>

> ---
> v2: convert OBJECT_CHECK() to INTERFACE_CHECK()
> ---
>   include/hw/ppc/pnv_xscom.h |    6 ++----
>   1 file changed, 2 insertions(+), 4 deletions(-)
> 
> diff --git a/include/hw/ppc/pnv_xscom.h b/include/hw/ppc/pnv_xscom.h
> index 1c1d76bf9be5..306c22461587 100644
> --- a/include/hw/ppc/pnv_xscom.h
> +++ b/include/hw/ppc/pnv_xscom.h
> @@ -22,13 +22,11 @@
>   
>   #include "qom/object.h"
>   
> -typedef struct PnvXScomInterface {
> -    Object parent;
> -} PnvXScomInterface;
> +typedef struct PnvXScomInterface PnvXScomInterface;
>   
>   #define TYPE_PNV_XSCOM_INTERFACE "pnv-xscom-interface"
>   #define PNV_XSCOM_INTERFACE(obj) \
> -     OBJECT_CHECK(PnvXScomInterface, (obj), TYPE_PNV_XSCOM_INTERFACE)
> +    INTERFACE_CHECK(PnvXScomInterface, (obj), TYPE_PNV_XSCOM_INTERFACE)
>   #define PNV_XSCOM_INTERFACE_CLASS(klass)                \
>       OBJECT_CLASS_CHECK(PnvXScomInterfaceClass, (klass), \
>                          TYPE_PNV_XSCOM_INTERFACE)
> 
>