KVM: Fix preemption counter leak in kvm_timer_init()

Based on a patch from Thomas Meyer.

Signed-off-by: Avi Kivity <avi@redhat.com>

diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index e3abd84750c728693329481a9d2e63ffe3701644..b989e1f1e5d36b732d1d9c864f369b39a7459105 100644 (file)
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -4564,9 +4564,11 @@ static void kvm_timer_init(void)
 #ifdef CONFIG_CPU_FREQ
                struct cpufreq_policy policy;
                memset(&policy, 0, sizeof(policy));
-               cpufreq_get_policy(&policy, get_cpu());
+               cpu = get_cpu();
+               cpufreq_get_policy(&policy, cpu);
                if (policy.cpuinfo.max_freq)
                        max_tsc_khz = policy.cpuinfo.max_freq;
+               put_cpu();
 #endif
                cpufreq_register_notifier(&kvmclock_cpufreq_notifier_block,
                                          CPUFREQ_TRANSITION_NOTIFIER);