Re: [PATCH v5 08/19] iommufd: PFN handling for iopt_pages

[Jason Gunthorpe <jgg@nvidia.com>]

On Fri, Nov 18, 2022 at 02:24:23AM +0000, Tian, Kevin wrote:
> > From: Jason Gunthorpe <jgg@nvidia.com>
> > Sent: Thursday, November 17, 2022 5:01 AM
> > +static void batch_skip_carry(struct pfn_batch *batch, unsigned int skip_pfns)
> > +{
> > +	if (!batch->total_pfns)
> > +		return;
> > +	skip_pfns = min(batch->total_pfns, skip_pfns);
> > +	batch->pfns[0] += skip_pfns;
> > +	batch->npfns[0] -= skip_pfns;
> > +	batch->total_pfns -= skip_pfns;
> > +}
> 
> You forgot to add the assertion which you replied to v4:
> 
> @@ -239,6 +239,8 @@ static void batch_skip_carry(struct pfn_batch *batch, unsigned int skip_pfns)
>  {
>         if (!batch->total_pfns)
>                 return;
> +       if (IS_ENABLED(CONFIG_IOMMUFD_TEST))
> +               WARN_ON(batch->total_pfns != batch->npfns[0]);
>         skip_pfns = min(batch->total_pfns, skip_pfns);
>

All the IS_ENABLED assertions are together in a later patch

Thanks,
Jason