[PATCH: kvm 5/5] Math is hard; let's do some cooking.

Zachary Amsden
2009-09-25T00:49:48Z

CPU frequency change callback provides new TSC frequency for us, and in the
same units (kHz), so there is no reason to do any math.

Signed-off-by: Zachary Amsden <zamsden@redhat.com>
---
arch/x86/kvm/x86.c | 5 +----
1 files changed, 1 insertions(+), 4 deletions(-)

diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 66c6bb9..60ae2c7 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -3070,15 +3070,12 @@ static int kvmclock_cpufreq_notifier(struct notifier_block *nb, unsigned long va
struct kvm *kvm;
struct kvm_vcpu *vcpu;
int i, send_ipi = 0;
- unsigned long old_khz;

if (val == CPUFREQ_PRECHANGE && freq->old > freq->new)
return 0;
if (val == CPUFREQ_POSTCHANGE && freq->old < freq->new)
return 0;
- old_khz = per_cpu(cpu_tsc_khz, freq->cpu);
- per_cpu(cpu_tsc_khz, freq->cpu) = cpufreq_scale(old_khz, freq->old,
- freq->new);
+ per_cpu(cpu_tsc_khz, freq->cpu) = freq->new;

spin_lock(&kvm_lock);
list_for_each_entry(kvm, &vm_list, vm_list) {
--
1.6.4.4