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charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Thu, 29 Nov 2018, Vincenzo Frascino wrote: > Depending on the clocksource selected there can be supported a > different resolution hence we require a mask to be applied to the > time calculation. > > This patch exposes the mask in the datapage for Raw and NTP adjusted > clock. > > Cc: Arnd Bergmann > Signed-off-by: Vincenzo Frascino > --- > include/vdso/datapage.h | 2 ++ > 1 file changed, 2 insertions(+) > > diff --git a/include/vdso/datapage.h b/include/vdso/datapage.h > index d50a108afaed..0a7bdccf5773 100644 > --- a/include/vdso/datapage.h > +++ b/include/vdso/datapage.h > @@ -34,6 +34,8 @@ struct vdso_data { > __u64 wtm_clock_nsec; > __u64 btm_nsec; /* Monotonic to boot time */ > __u64 tai_sec; /* International Atomic Time */ > + __u64 cs_mono_mask; /* NTP-adjusted clocksource mask */ > + __u64 cs_raw_mask; /* Raw clocksource mask */ And why would they be different? The core timekeeper has them duplicated purely for access pattern optimization and simplicity. Thanks, tglx _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel