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SubjectRe: device driver for the SGI system clock, mmtimer
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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