On Mon, Mar 3, 2014 at 7:13 PM, Davidlohr Bueso <davidlohr@xxxxxx> wrote:
>
> Yes, I shortly realized that was silly... but I can say for sure it can
> happen and a quick qemu run confirms it. So I see your point as to
> asking why we need it, so now I'm looking for an explanation in the
> code.
We definitely *do* have users.
One example would be ptrace -> access_process_vm -> __access_remote_vm
-> get_user_pages() -> find_extend_vma() -> find_vma_prev -> find_vma.
Linus
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