Re: [PATCH v2 6/8] iommu: Move IOMMU pagesize check to attach_device

[Sven Peter]

On Tue, Aug 31, 2021, at 23:39, Alyssa Rosenzweig wrote:
> > +	if ((1 << __ffs(domain->pgsize_bitmap)) > PAGE_SIZE) {
> 
> Not a fan of this construction. Could you assign `(1 <<
> __ffs(domain->pgsize_bitmap))` to an appropriately named temporary (e.g
> min_io_pgsize) so it's clearer what's going on?

Good point, will do that for the next version.

> 
> > +		pr_warn("IOMMU page size cannot represent CPU pages.\n");
> 
> "Represent" how?
> 

Looks like I dropped an "exactly" there when taking this line from iova.c :)



Thanks,


Sven