On 03/17/2014 12:49 PM, Jan Kara wrote:
> +int get_vaddr_pfns(unsigned long start, int nr_pfns, int write, int force,
> + struct pinned_pfns *pfns)
> +{
...
> + if (!(vma->vm_flags & (VM_IO | VM_PFNMAP))) {
> + pfns->got_ref = 1;
> + pfns->is_pages = 1;
> + ret = get_user_pages(current, mm, start, nr_pfns, write, force,
> + pfns_vector_pages(pfns), NULL);
> + goto out;
> + }
Have you given any thought to how this should deal with VM_MIXEDMAP
vmas? get_user_pages() will freak when it hits the !vm_normal_page()
test on the pfnmapped ones, and jump out. Shouldn't get_vaddr_pfns() be
able to handle those too?
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