From 5b44e45b5a7e3096b6665cabbe00463c1f33c676 Mon Sep 17 00:00:00 2001 From: Andi Kleen Date: Sun, 22 Oct 2006 00:59:04 +0000 Subject: [PATCH] [PATCH] x86-64: Fix C3 timer test 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. Acked-by: Len Brown Signed-off-by: Andi Kleen Signed-off-by: Greg Kroah-Hartman Signed-off-by: Chris Wright --- arch/x86_64/kernel/time.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/x86_64/kernel/time.c b/arch/x86_64/kernel/time.c index 7a9b18224182c..ffd1cb88fa75f 100644 --- a/arch/x86_64/kernel/time.c +++ b/arch/x86_64/kernel/time.c @@ -960,7 +960,7 @@ __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; -- 2.47.2