Messages in this thread | | | Date | Sun, 13 Feb 2011 15:24:55 -0500 | From | Nikolaus Rath <> | Subject | Re: virt_to_page for userspace pointers |
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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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