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

Message ID 1253839640-12695-6-git-send-email-zamsden@redhat.com (mailing list archive)
State New, archived
Headers show

Commit Message

Zachary Amsden Sept. 25, 2009, 12:47 a.m. UTC 
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(-)
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Patch

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) {