Nicolai Stange <nicsta...@gmail.com> writes: > In preparation for making the clockevents core NTP correction aware, > all clockevent device drivers must set ->min_delta_ticks and > ->max_delta_ticks rather than ->min_delta_ns and ->max_delta_ns: a > clockevent device's rate is going to change dynamically and thus, the > ratio of ns to ticks ceases to stay invariant. > > Make the x86 arch's lguest clockevent driver initialize these fields > properly. > > This patch alone doesn't introduce any change in functionality as the > clockevents core still looks exclusively at the (untouched) ->min_delta_ns > and ->max_delta_ns. As soon as this has changed, a followup patch will > purge the initialization of ->min_delta_ns and ->max_delta_ns from this > driver.
Acked-by: Rusty Russell <ru...@rustcorp.com.au> > > Signed-off-by: Nicolai Stange <nicsta...@gmail.com> > --- > > Notes: > This prerequisite patch is part of a larger effort to feed NTP > corrections into the clockevent devices' frequencies and thus > avoiding their notion of time to diverge from the system's > one. If you're interested, the current state of the whole series > can be found at [1]. > > If you haven't got any objections and these prerequisites get > merged by 4.12 everywhere, I'll proceed with the remainder of > this series in 4.13. > > Applicable to next-20170324 as well as to John' Stultz tree [2]. > > [1] > git://nicst.de/linux.git cev-freq-adj.v10.fortglx-4.12-time > > https://nicst.de/git/?p=linux.git;a=shortlog;h=refs/heads/cev-freq-adj.v10.fortglx-4.12-time > > [2] > https://git.linaro.org/people/john.stultz/linux.git fortglx/4.12/time > > arch/x86/lguest/boot.c | 2 ++ > 1 file changed, 2 insertions(+) > > diff --git a/arch/x86/lguest/boot.c b/arch/x86/lguest/boot.c > index d3289d7e78fa..3e4bf887a246 100644 > --- a/arch/x86/lguest/boot.c > +++ b/arch/x86/lguest/boot.c > @@ -994,7 +994,9 @@ static struct clock_event_device lguest_clockevent = { > .mult = 1, > .shift = 0, > .min_delta_ns = LG_CLOCK_MIN_DELTA, > + .min_delta_ticks = LG_CLOCK_MIN_DELTA, > .max_delta_ns = LG_CLOCK_MAX_DELTA, > + .max_delta_ticks = LG_CLOCK_MAX_DELTA, > }; > > /* > -- > 2.12.0