Re: pte_pagenr/MAP_NR deleted in pre6

[Kanoj Sarcar <kanoj@google.engr.sgi.com>]

> 
>    So you'll be adding an isa_alloc_consistant, mca_alloc_consistent, 
>    m68k_motherboard_alloc_consistent , ....
> 
> I'll probably be adding isa_virt_to_bus, because when it is in fact
> "ISA like" the driver already knows that it must be certain that the
> physical address is below the 16MB mark right?  Then the cases left on
> x86 are MCA (which can use the ISA interface) and PCI drivers which
> must be updated to use the PCI dma API.
>

Just a minor nit. 

So, unlike system vendors adding in dma mapping registers for PCI32
devices to dma anywhere into their >32 bit physical address space, you 
are assuming no vendor will ever have a mapping scheme for ISA devices
that let them get over the 16MB mark? 

Of course, I am not aware of ISA that much anyway (and I hope I don't
have to!), so please ignore this if it doesn't make sense.

Kanoj
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