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x86: add warning to check_tsc_warp()

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add warning to check_tsc_warp() - if get_cycles() does not progress.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Ingo Molnar 2008-01-30 13:33:24 +01:00
parent df43510b18
commit ad8ca495bd
1 changed files with 5 additions and 1 deletions
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6
arch/x86/kernel/tsc_sync.c
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@ -87,7 +87,11 @@ static __cpuinit void check_tsc_warp(void)
nr_warps++; nr_warps++;
__raw_spin_unlock(&sync_lock); __raw_spin_unlock(&sync_lock);
} }
}
if (!(now-start)) {
printk("Warning: zero tsc calibration delta: %Ld [max: %Ld]\n",
now-start, end-start);
WARN_ON(1);
} }
} }