Re: device driver for the SGI system clock, mmtimer

[Robert Picco]

Alan Cox wrote:

> On Iau, 2004-09-16 at 17:09, Jesse Barnes wrote:
>  
>
> > I think Christoph already looked at that.  And HPET doesn't provide mmap 
> > functionality, does it?  I.e. allow a userspace program to dereference the 
> > counter register directly?
> >    
>
> It can do but that assumes nothing else is mapped into the same page
> that would be harmful or reveal information that should not be revealed
> etc..
>
>  
HPET driver does provide mmap for user programs. 

I agree with caution of other device registers in the same page. 
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