diff options
Diffstat (limited to 'arch/x86/kernel/tsc.c')
| -rw-r--r-- | arch/x86/kernel/tsc.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/arch/x86/kernel/tsc.c b/arch/x86/kernel/tsc.c index 839070ba846..6dab90f6851 100644 --- a/arch/x86/kernel/tsc.c +++ b/arch/x86/kernel/tsc.c @@ -317,6 +317,12 @@ static unsigned long quick_pit_calibrate(void) t2 = get_cycles(); /* + * Make sure we can rely on the second TSC timestamp: + */ + if (!pit_expect_msb(--expect)) + goto failed; + + /* * Ok, if we get here, then we've seen the * MSB of the PIT decrement QUICK_PIT_ITERATIONS * times, and each MSB had many hits, so we never |