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authorNicolai Stange <nicstange@gmail.com>2017-03-30 23:03:41 +0300
committerJohn Stultz <john.stultz@linaro.org>2017-04-14 23:11:12 +0300
commitb77f41618c2647e80ee45d6609d95b3d4a10e372 (patch)
tree9ec438b01d473c4ce3cb231e0713584fcbade5f6
parent7fd534247d1b6fcd399ab70f04db39047724898a (diff)
downloadlinux-b77f41618c2647e80ee45d6609d95b3d4a10e372.tar.xz
x86/lguest/timer: Set ->min_delta_ticks and ->max_delta_ticks
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. Cc: Ingo Molnar <mingo@redhat.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Daniel Lezcano <daniel.lezcano@linaro.org> Cc: Richard Cochran <richardcochran@gmail.com> Cc: Prarit Bhargava <prarit@redhat.com> Cc: Stephen Boyd <sboyd@codeaurora.org> Cc: Rusty Russell <rusty@rustcorp.com.au> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: x86@kernel.org Cc: Paul Bolle <pebolle@tiscali.nl> Cc: Andy Lutomirski <luto@kernel.org> Cc: Juergen Gross <jgross@suse.com> Cc: "Luis R. Rodriguez" <mcgrof@kernel.org> Cc: lguest@lists.ozlabs.org Acked-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Nicolai Stange <nicstange@gmail.com> Signed-off-by: John Stultz <john.stultz@linaro.org>
-rw-r--r--arch/x86/lguest/boot.c2
1 files changed, 2 insertions, 0 deletions
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,
};
/*