Re: [PATCH v6 07/10] iommufd: Add a nested HW pagetable object

[Jason Gunthorpe]

On Tue, Oct 24, 2023 at 08:06:06AM -0700, Yi Liu wrote:
>  static inline void iommufd_hw_pagetable_put(struct iommufd_ctx *ictx,
>                                           struct iommufd_hw_pagetable *hwpt)
>  {
> -     struct iommufd_hwpt_paging *hwpt_paging = to_hwpt_paging(hwpt);
> +     if (WARN_ON(hwpt->obj.type != IOMMUFD_OBJ_HWPT_PAGING &&
> +                 hwpt->obj.type != IOMMUFD_OBJ_HWPT_NESTED))
> +             return;

This is redundant, we have a C type, no need to check the type field
like this

Jason