[PATCH v2 1/6] powerpc/pseries/iommu: Create defines for operations in ibm,ddw-applicable

[Leonardo Bras]

On Thu, 2020-07-02 at 10:21 +1000, Alexey Kardashevskiy wrote:
> > enum {
> >        DDW_QUERY_PE_DMA_WIN,
> >        DDW_CREATE_PE_DMA_WIN,
> >        DDW_REMOVE_PE_DMA_WIN,
> > 
> >        DDW_APPLICABLE_SIZE
> > }
> > IMO, it looks better than all the defines before.
> > 
> > What do you think?
> 
> No, not really, these come from a binary interface so the reader of this
> cares about absolute numbers and rather wants to see them explicitly.

Makes sense to me.
I am still getting experience on where to use enum vs define. Thanks
for the tip!

Using something like 
enum {
	DDW_QUERY_PE_DMA_WIN = 0,
	DDW_CREATE_PE_DMA_WIN = 1,
	DDW_REMOVE_PE_DMA_WIN = 2,

	DDW_APPLICABLE_SIZE
};

would be fine too?
Or should one stick to #define in this case?

Thank you,