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    SubjectRe: virt_to_page for userspace pointers
    On 02/05/2011 04:36 PM, Brice Goglin wrote:
    >> Is there an equivalent function to virt_to_page (and virt_to_phys) that
    >> works with userspace pointers? Or do I have to manually walk through the
    >> page tables? In the later case, are there any examples of this kind of
    >> search that I could use as a basis?
    >>
    >
    > You probably want get_user_pages() (or get_user_pages_fast()).

    Thanks for the pointer, that already helped a lot!

    I would, however, prefer a more primitive function that just gives me
    the struct page without locking it. And if the page is swapped out, I'd
    rather get a NULL pointer than having a page frame allocated. Is there
    anything like that?

    Thanks,

    -Nikolaus

    --
    »Time flies like an arrow, fruit flies like a Banana.«

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