diff options
Diffstat (limited to 'arch/x86/lib/delay.c')
| -rw-r--r-- | arch/x86/lib/delay.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/x86/lib/delay.c b/arch/x86/lib/delay.c index f4568605d7d5..ff485d361182 100644 --- a/arch/x86/lib/delay.c +++ b/arch/x86/lib/delay.c @@ -55,8 +55,10 @@ static void delay_tsc(unsigned long loops) preempt_disable(); cpu = smp_processor_id(); + rdtsc_barrier(); rdtscl(bclock); for (;;) { + rdtsc_barrier(); rdtscl(now); if ((now - bclock) >= loops) break; @@ -78,6 +80,7 @@ static void delay_tsc(unsigned long loops) if (unlikely(cpu != smp_processor_id())) { loops -= (now - bclock); cpu = smp_processor_id(); + rdtsc_barrier(); rdtscl(bclock); } } |