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Diffstat (limited to 'src/cpu/x86/tsc')
| -rw-r--r-- | src/cpu/x86/tsc/delay_tsc.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/src/cpu/x86/tsc/delay_tsc.c b/src/cpu/x86/tsc/delay_tsc.c index c7c431baac..31c5bf80eb 100644 --- a/src/cpu/x86/tsc/delay_tsc.c +++ b/src/cpu/x86/tsc/delay_tsc.c @@ -159,7 +159,11 @@ void udelay(unsigned us) count = rdtscll(); stop = clocks + count; while(stop > count) { +#ifdef CONFIG_SMP +#if CONFIG_SMP == 1 cpu_relax(); +#endif +#endif count = rdtscll(); } } |