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SubjectRe: cryptoapi highmem bug
On Tue, 24 Feb 2004, Andrew Morton wrote:

> Jean-Luc Cooke <jlcooke@certainkey.com> wrote:
> >
> > How do I check for equal real addresses from two virtual ones?
>
> I don't think there is a practical way of doing this. It would involve
> comparing the virtual address with the kmap and atomic kmap regions,
> performing a pagetable walk, extracting the pageframe. If the page is not
> in a kmap area generate the pageframe directly. Make that work on all
> architectures. Very yuk.
>
> If practical this API should have been defined in terms of
> (page/offset/len) and it should have kmapped the pages itself. I guess
> it's too late for that.

Do you mean that the crypt() function should do kmapping?

It's not too late to change internals.



- James
--
James Morris
<jmorris@redhat.com>


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