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KVM: Convert kvm_lock to raw_spinlock

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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>
This commit is contained in:
Jan Kiszka
2011-02-08 12:55:33 +01:00
committed by Marcelo Tosatti
parent bd3d1ec3d2
commit e935b8372c
4 changed files with 23 additions and 23 deletions
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4
arch/x86/kvm/x86.c
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@@ -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) {
/*