Re: (no subject)

[Keir Fraser]

On 18 Nov 2005, at 16:05, Andi Kleen wrote:

> I don't think you can do that. We still need these functions in low
> level architecture code at least.
>
> Using __pa/__va doesn't cut it because it won't work on Xen guests
> which have different views on bus vs physical addresses. The Xen
> code is (hopefully) in the process of being merged, so intentionally
> breaking them isn't a good idea.
>
> So if anything there would need to be replacement functions for it
> first that do the same thing. But why not just keep the old ones?

We could make use of virt_to_machine/machine_to_virt instead, which 
arguably better describe the intent of those functions. Currently we 
only use virt_to_bus/bus_to_virt in our swiotlb implementation, and our 
modified dma_map code. In those files I think the existing function 
names make some sense, but we can easily change if that's preferred.

 -- Keir

-
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/