linux-kernel - Re: [PATCH V10 33/44] kmap: Make kmap work for devmap protected pages

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Message-ID: <Ynxh/5jewIuGwb5d@iweiny-desk3>
Date:   Wed, 11 May 2022 18:25:19 -0700
From:   Ira Weiny <ira.weiny@...el.com>
To:     Christoph Hellwig <hch@...radead.org>
Cc:     Dave Hansen <dave.hansen@...ux.intel.com>,
        "H. Peter Anvin" <hpa@...or.com>,
        Dan Williams <dan.j.williams@...el.com>,
        Fenghua Yu <fenghua.yu@...el.com>,
        Rick Edgecombe <rick.p.edgecombe@...el.com>,
        "Shankar, Ravi V" <ravi.v.shankar@...el.com>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH V10 33/44] kmap: Make kmap work for devmap protected pages

On Thu, Apr 28, 2022 at 08:50:34AM -0700, Christoph Hellwig wrote:
> On Tue, Apr 19, 2022 at 10:06:38AM -0700, ira.weiny@...el.com wrote:
> > index a77be5630209..32ed07c2994b 100644
> > --- a/include/linux/highmem-internal.h
> > +++ b/include/linux/highmem-internal.h
> > @@ -151,6 +151,8 @@ static inline void totalhigh_pages_add(long count)
> >  
> >  #else /* CONFIG_HIGHMEM */
> >  
> > +#include <linux/memremap.h>
> 
> Uuuh, I'd really prefer to avoid having to pull in memremap.h into
> basically the whole kernel build.
> 

Fair enough.  What should I call a header to store the new pgmap_set_*() calls?

devmap_prot.h

?

Or I could just add the calls into highmem-internal.h.  That might be more
appropriate given the new direction of that interface.

I think I'm leaning toward that vs adding another header.

Ira