Re: [Xen-devel] question about page_to_phys

[Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>]

On 1 Sep 2005, at 02:29, Xiaofeng Ling wrote:

> The page_to_phys is defined as
> #define page_to_phys(page)   
> (phys_to_machine(page_to_pseudophys(page)))
> so it return machine addresss
> while virt_to_phys return psedophys. include/asm-xen/asm-i386/io.h
> this is really confusing.
> why not define page_to_machine?
page_to_phys() is used only in places where we want to compare machine 
addresses (e.g., in deciding when to merge I/O requests). It was easier 
to abuse the macro definition than fix every place that it is used.
 -- Keir


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