KVM: Convert kvm_lock to raw_spinlock

Code under this lock requires non-preemptibility. Ensure this also over
-rt by converting it to raw spinlock.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Avi Kivity <avi@redhat.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index bd59e8ede88e..d9855b8584cf 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -4557,7 +4557,7 @@ static int kvmclock_cpufreq_notifier(struct notifier_block *nb, unsigned long va
 
         smp_call_function_single(freq->cpu, tsc_khz_changed, freq, 1);
 
-        spin_lock(&kvm_lock);
+        raw_spin_lock(&kvm_lock);
         list_for_each_entry(kvm, &vm_list, vm_list) {
                 kvm_for_each_vcpu(i, vcpu, kvm) {
                         if (vcpu->cpu != freq->cpu)
@@ -4567,7 +4567,7 @@ static int kvmclock_cpufreq_notifier(struct notifier_block *nb, unsigned long va
                                 send_ipi = 1;
                 }
         }
-        spin_unlock(&kvm_lock);
+        raw_spin_unlock(&kvm_lock);
 
         if (freq->old < freq->new && send_ipi) {
                 /*