[PATCH 2/5] Implement generic time of day clocksource for powerpc machines.
paulus at samba.org
Thu Sep 20 10:52:16 EST 2007
Daniel Walker writes:
> If you switch to the rtc do the shift and mult need to change?
You can't switch; any given CPU chip will have either the RTC or the
timebase but not both.
> > + /* XXX this assumes clock->shift == 22 */
> > + /* 4611686018 ~= 2^(20+64-22) / 1e9 */
> > + t2x = (u64) clock->mult * 4611686018ULL;
> It might make the code more readable if you put that constant into a
> macro that gives it a name.
The comment already gives more information than some arbitrary name
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