On Mon, Jun 30, 2014 at 1:31 PM, Tony Luck <tony.l...@intel.com> wrote:
> +#else
> + jiffy *= HZ_TO_NSEC_NUM;
> + do_div(jiffy, HZ_TO_NSEC_DEN);
> + return jiffy;
> +#endif
Well that didn't work either. kernel/trace/trace_clock.c doesn't include
timeconst.h - so we fail the compile because HZ_TO_NSEC_{NUM,DEN}
aren't defined. a #include looks dicey because timeconst.h is a generated
file up the the kernel/ level ... so getting Makefile dependencies right would
be ugly.
Do we really need to convert to nanoseconds? Couldn't we just return
jiffies:
u64 notrace trace_clock_jiffies(void)
{
return jiffies_64 - INITIAL_JIFFIES;
}
and leave it as an exercise to userspace to interpret that?
-Tony
[Yes, this changes the UI . but there can't be any serious users
given that the existing UI only works for 1hr 11 minutes after each
boot]
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majord...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
