odd tsc related msg at bootup.

[Dave Jones]

Whilst diagnosing an unrelated problem by looking through
a users dmesg, I noticed this..

CPU#0 had 0 usecs TSC skew, fixed it up.
CPU#1 had 0 usecs TSC skew, fixed it up.

Which looks very strange.
Taking a look at the code in arch/i386/kernel/smpboot.c:synchronize_tsc_bp()
I'm puzzled at to how this happened, as we should only hit that
printk with a skew of more than 2 usecs.

		Dave
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