Re: [PATCH] powerpc/powernv: Remove support for p5ioc2

[Russell Currey <ruscur@russell.cc>]

On Wed, 2016-01-13 at 17:39 +1100, Andrew Donnellan wrote:
> On 13/01/16 17:10, Russell Currey wrote:
> > "p5ioc2 is used by approximately 2 machines in the world, and has never
> > ever been a supported configuration."
> > 
> > The code for p5ioc2 is essentially unused and complicates what is already
> > a very complicated codebase.  Its removal is essentially a "free win" in
> > the effort to simplify the powernv PCI code.
> > 
> > In addition, support for p5ioc2 has been dropped from skiboot.  There's no
> > reason to keep it around in the kernel.
> > 
> > Signed-off-by: Russell Currey <ruscur@russell.cc>
> 
> Doesn't apply cleanly on next, but that's minor.
Going to do a V2 to address your other comment, so I might as well fix the next
issue.
> 
> > @@ -117,11 +115,6 @@ struct pnv_phb {
> > 
> >   	union {
> >   		struct {
> > -			struct iommu_table iommu_table;
> > -			struct iommu_table_group table_group;
> > -		} p5ioc2;
> > -
> > -		struct {
> >   			/* Global bridge info */
> >   			unsigned int		total_pe;
> >   			unsigned int		reserved_pe;
> 
> Given this leaves struct ioda as the only member of the union, do we 
> want to get rid of the union?
> 
Probably.  I was going to leave that for future patches (which will be a proper
refactoring rather than a pure removal), but given it makes no difference I
should just get rid of it now.

Thanks for the review.