diff options
| -rw-r--r-- | xen/arch/x86/time.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/xen/arch/x86/time.c b/xen/arch/x86/time.c index 5a56b717c9..7f1a1153d7 100644 --- a/xen/arch/x86/time.c +++ b/xen/arch/x86/time.c @@ -1442,6 +1442,10 @@ struct tm wallclock_time(void) * TSC Reliability check */ +/* + * The Linux original version of this function is + * Copyright (c) 2006, Red Hat, Inc., Ingo Molnar + */ void check_tsc_warp(unsigned long tsc_khz, unsigned long *max_warp) { #define rdtsc_barrier() mb() @@ -1494,7 +1498,7 @@ void check_tsc_warp(unsigned long tsc_khz, unsigned long *max_warp) if ( unlikely(prev > now) ) { spin_lock(&sync_lock); - if ( *max_warp > prev - now ) + if ( *max_warp < prev - now ) *max_warp = prev - now; spin_unlock(&sync_lock); } |