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    SubjectRe: [PATCH] KVM: x86: Use do_div for tsc deadline calculation
    On 09/30/11 04:50, Jan Kiszka wrote:
    > Required on i386 hosts.
    >
    > Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>

    Reported-by: Randy Dunlap <rdunlap@xenotime.net>
    Acked-by: Randy Dunlap <rdunlap@xenotime.net>

    Thanks.

    > ---
    > arch/x86/kvm/lapic.c | 7 ++++---
    > 1 files changed, 4 insertions(+), 3 deletions(-)
    >
    > diff --git a/arch/x86/kvm/lapic.c b/arch/x86/kvm/lapic.c
    > index f9385ec..92390dc 100644
    > --- a/arch/x86/kvm/lapic.c
    > +++ b/arch/x86/kvm/lapic.c
    > @@ -740,9 +740,10 @@ static void start_apic_timer(struct kvm_lapic *apic)
    >
    > now = apic->lapic_timer.timer.base->get_time();
    > guest_tsc = kvm_x86_ops->read_l1_tsc(vcpu);
    > - if (likely(tscdeadline > guest_tsc))
    > - ns = (tscdeadline - guest_tsc)
    > - * 1000000L / this_tsc_khz;
    > + if (likely(tscdeadline > guest_tsc)) {
    > + ns = (tscdeadline - guest_tsc) * 1000000ULL;
    > + do_div(ns, this_tsc_khz);
    > + }
    > hrtimer_start(&apic->lapic_timer.timer,
    > ktime_add_ns(now, ns), HRTIMER_MODE_ABS);
    >


    --
    ~Randy
    *** Remember to use Documentation/SubmitChecklist when testing your code ***


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