Re: can device drivers return non-ram via vm_ops->nopage?

[David Woodhouse]

On Sun, 2004-03-21 at 17:34 -0500, Jeff Garzik wrote:
> Tell driver writers to call a standard platform function with a 
> {dma|mmio|pio|vmalloc} handle+size+len for {dma|mmio|pio|vmalloc} mmap 
> setup, and {fault|nopage} handler.  ;-)  IMO they shouldn't have to care 
> about the details.

Don't let drivers see the {fault|nopage} handler. On most arches it can
probably continue to be nopage(); other arches may use the
newly-proposed fault() or perhaps just put all the PTEs in place up
front. The driver shouldn't be given an opportunity to care.

-- 
dwmw2


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