Re: [PATCH v2 1/4] RISC-V: Fix ioremap_cache() and ioremap_wc() for systems with Svpbmt

[Palmer Dabbelt]

On Wed, 28 Sep 2022 05:14:30 PDT (-0700), Christoph Hellwig wrote:
> On Thu, Sep 22, 2022 at 09:35:56AM -0700, Palmer Dabbelt wrote:
> > Sorry I missed this, I thought it was just part of the rest of this patch
> > set.  That said, I'm not actually sure this is a critical fix: sure it's a
> > performance problem, and if some driver is expecting ioremap_cache() to go
> > fast then possibly a pretty big one, but the only Svpmbt hardware that
>
> More importantly nothing should be using ioremap_cache at all.  It is
> an API that has long been deprecated in favor of memremap.

There's a few uses of it, I just send along a patch to make it 
arch-specific and make the users depend on it.  That should let us stop 
adding this to ports just to get the drivers building.