On 04/26/2011 05:40 PM, Takuya Yoshikawa wrote:
On Tue, 26 Apr 2011 08:34:57 +0200
Jan Kiszka<[email protected]> wrote:
> > Google said that there was a similar talk on LKML in 2004.
> >
> > On that threads, Linus explained how to tackle on the 64-bit get_user
> > implementation. But I could not see what happened after that.
>
> Mmh, maybe the kernel was lacking a real use case, so no one seriously
> cared.
>
> I don't see a fundamental blocker for an x86-32 __get_user_8 version
> based on two mov. I would give it a try.
>
> Jan
>
Thank you!
Avi, do we revert the patch now, or ...?
Please post a simple patch that uses two get_user()s for that case
(64-bit pte on 32-bit host). Then work with the x86 tree to see if
they'll accept 64-bit get_user(), and once they do, we can go back to a
simple get_user() again.
btw, I think we can use __get_user() here since the address must have
been already validated.
--
error compiling committee.c: too many arguments to function
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