x86: Hyper-V: register clocksource only if its advertised

[pandora-kernel.git] / arch / x86 / kernel / cpu / mshyperv.c

diff --git a/arch/x86/kernel/cpu/mshyperv.c b/arch/x86/kernel/cpu/mshyperv.c
index 0a630dd..646d192 100644 (file)
--- a/arch/x86/kernel/cpu/mshyperv.c
+++ b/arch/x86/kernel/cpu/mshyperv.c
@@ -68,7 +68,8 @@ static void __init ms_hyperv_init_platform(void)
        printk(KERN_INFO "HyperV: features 0x%x, hints 0x%x\n",
               ms_hyperv.features, ms_hyperv.hints);
 
-       clocksource_register_hz(&hyperv_cs, NSEC_PER_SEC/100);
+       if (ms_hyperv.features & HV_X64_MSR_TIME_REF_COUNT_AVAILABLE)
+               clocksource_register_hz(&hyperv_cs, NSEC_PER_SEC/100);
 }
 
 const __refconst struct hypervisor_x86 x86_hyper_ms_hyperv = {