Messages in this thread | | | Date | Fri, 03 Oct 2008 15:15:24 -0400 (EDT) | From | Nicolas Pitre <> | Subject | Re: [PATCH 1/2] MN10300: Move asm-arm/cnt32_to_63.h to include/linux/ |
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On Thu, 2 Oct 2008, David Howells wrote:
> Nicolas Pitre <nico@cam.org> wrote: > > > Oh, that's a possibility. In that case __m_cnt_hi will be reverted to a > > previous state just like if cnt32_to_63() has not been called yet since > > the new half period. And a subsequent call will fix that again. > > Surely that's not good enough. There's a 50% chance that reversion to a > previous state will result in an extra increment of the __m_cnt_hi on the next > call.
If so then you're using this interface in an inappropriate way.
The _absolute_ minimum frequency with which this should be fully executed is once per half period of the base counter. I hope that in practice it happens far more often than that.
Nicolas
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