Re: [XEN PATCH 02/13] AMD/IOMMU: fixed violations of MISRA C:2012 Rule 7.2

[Stefano Stabellini <sstabellini@xxxxxxxxxx>]

On Tue, 20 Jun 2023, Luca Fancellu wrote:
> > On 20 Jun 2023, at 13:39, Jan Beulich <jbeulich@xxxxxxxx> wrote:
> > 
> > On 20.06.2023 12:34, Simone Ballarin wrote:
> >> --- a/xen/drivers/passthrough/amd/iommu-defs.h
> >> +++ b/xen/drivers/passthrough/amd/iommu-defs.h
> >> @@ -38,49 +38,49 @@
> >>         ((uint64_t)(offset) << (12 + (PTE_PER_TABLE_SHIFT * ((level) - 
> >> 1))))
> >> 
> >> /* IOMMU Capability */
> >> -#define PCI_CAP_ID_MASK 0x000000FF
> >> +#define PCI_CAP_ID_MASK 0x000000FFU
> > 
> > Seeing this and similar uses further down, I think there's a purely
> > stylistic question to be resolved first (and hence I'm widening the To:
> > list here): Do we want to allow either case of U to be used
> > interchangeably, leaving the choice up to the patch author?
> 
> Because you ask to the list, my personal opinion is that we might want to
> have only capital U, so that it’s consistent across the codebase and we don’t
> need to create too many rules for the developer, it stands out anyway as it 
> can’t
> be an hex digit

I agree with Luca