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[PATCH] x86-64: Fix C3 timer test

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There was a typo in the C3 latency test to decide of the TSC
should be used or not. It used the C2 latency threshold, not the
C3 one. Fix that.

This should fix the time on various dual core laptops.

Signed-off-by: Andi Kleen <ak@suse.de>
This commit is contained in:
Andi Kleen 2006-10-22 00:41:15 +02:00 committed by Andi Kleen
parent cb7fabcf9d
commit aa026ede51
1 changed files with 1 additions and 1 deletions
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2
arch/x86_64/kernel/time.c
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@ -948,7 +948,7 @@ __cpuinit int unsynchronized_tsc(void)
if (boot_cpu_data.x86_vendor == X86_VENDOR_INTEL) {
#ifdef CONFIG_ACPI
/* But TSC doesn't tick in C3 so don't use it there */
if (acpi_fadt.length > 0 && acpi_fadt.plvl3_lat < 100)
if (acpi_fadt.length > 0 && acpi_fadt.plvl3_lat < 1000)
return 1;
#endif
return 0;