Re: Adding kmap_atomic_prot_pfn (was: [git pull] drm patches for2.6.27-rc1)

[Benjamin Herrenschmidt]

On Thu, 2008-10-23 at 19:48 -0700, Linus Torvalds wrote:
> Then, there's the issue of 64-bit, and just mapping everything there, and 
> the interface to that. I liked the trivial extension to "struct resource" 
> to have a "cached mapping" pointer. So if we can just make it pass 
> resources around and get a page that way (and not even need kmap() on 
> 64-bit architections), that would be good.

I'm not that fan of carrying a mapping with a struct resource because if
we do that we should probably also refcount the mapping, and then there
is the whole question of mappings with different attributes, etc etc...

Cheers,
Ben.


--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/