Yang, Sheng wrote:
> +
> +static int pit_get_out(struct kvm *kvm, int channel)
> +{
> + struct kvm_kpit_channel_state *c =
> + &kvm->arch.vpit->pit_state.channels[channel];
> + s64 d, t;
> + int out;
> +
> + ASSERT(mutex_is_locked(&kvm->arch.vpit->pit_state.lock));
> +
> + t = ktime_to_ns(ktime_sub(ktime_get(), c->count_load_time));
> + d = muldiv64(t, PIT_FREQ, 1e9);
>
NSECS_PER_SEC to avoid people jumping on you saying you can't use
floating point in the kernel (yes, the compiler converts it at
compile-time, but they'll still say it).
--
Do not meddle in the internals of kernels, for they are subtle and quick to
panic.
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