KVM guest: prevent tracing recursion with kvmclock

[pandora-kernel.git] / arch / x86 / kernel / kvmclock.c

diff --git a/arch/x86/kernel/kvmclock.c b/arch/x86/kernel/kvmclock.c
index c1a0188..44842d7 100644 (file)
--- a/arch/x86/kernel/kvmclock.c
+++ b/arch/x86/kernel/kvmclock.c
@@ -74,9 +74,10 @@ static cycle_t kvm_clock_read(void)
        struct pvclock_vcpu_time_info *src;
        cycle_t ret;
 
-       src = &get_cpu_var(hv_clock);
+       preempt_disable_notrace();
+       src = &__get_cpu_var(hv_clock);
        ret = pvclock_clocksource_read(src);
-       put_cpu_var(hv_clock);
+       preempt_enable_notrace();
        return ret;
 }