Re: [PATCH 2/3] x86: Enable PAT to use cache mode translation tables

[Juergen Gross]

On 08/29/2014 01:21 AM, Toshi Kani wrote:
> On Tue, 2014-08-26 at 08:16 +0200, Juergen Gross wrote:
> > Update the translation tables from cache mode to pgprot values according to
> > the PAT settings. This enables changing the cache attributes of a PAT index in
> > just one place without having to change at the users side.
> >
> > With this change it is possible to use the same kernel with different PAT
> > configurations, e.g. supporting Xen.
> >
> > Signed-off-by: Juergen Gross <jgross@xxxxxxxx>
>
> I know I sent my review-by before, but my build test failed...
>
> > diff --git a/include/linux/mm.h b/include/linux/mm.h
> > index 8981cc8..d7bf551 100644
> > --- a/include/linux/mm.h
> > +++ b/include/linux/mm.h
> > @@ -1574,6 +1574,7 @@ extern void free_area_init(unsigned long * zones_size);
> >   extern void free_area_init_node(int nid, unsigned long * zones_size,
> >   		unsigned long zone_start_pfn, unsigned long *zholes_size);
> >   extern void free_initmem(void);
> > +extern void update_cache_mode_entry(unsigned entry, enum page_cache_mode cache);
>
> This new interface cannot be defined in this common header file since
> page_cache_mode is only defined in x86.  It should be defined in x86
> header, such as pat.h.

Oh, right you are.

Thanks,

Juergen

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