Re: [PATCH 2.6.15-rc4 1/1] cpia: use vm_insert_page() instead of remap_pfn_range()

[Christoph Hellwig <hch@infradead.org>]

>  	pos = (unsigned long)(cam->frame_buf);
>  	while (size > 0) {
> -		page = vmalloc_to_pfn((void *)pos);
> -		if (remap_pfn_range(vma, start, page, PAGE_SIZE, PAGE_SHARED)) {
> +		page = vmalloc_to_page((void *)pos);
> +		if (vm_insert_page(vma, start, page)) {

it would be nicer to do the arithmetis on pos as pointers rather than unsigned
long.  Also you might want to use alloc_pages + vmap instead of vmalloc so that
you already have a page array.  Or we should provide a helper that walks over
a vmalloc'ed region and calls vmalloc_to_page + vm_insert_page.  Either way
this type of code is duplicated far too much and we'd really need some better
interface for it.

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