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Date:	Wed, 27 Dec 2006 17:24:47 -0800
From:	Andrew Morton <>
To:	john stultz <>
Cc:	Andi Kleen <>,,,,
Subject: Re: [PATCH -mm 4/5][time][x86_64] Convert x86_64 to use

On Wed, 20 Dec 2006 17:13:43 -0500
john stultz <> wrote:

> This patch converts x86_64 to use the GENERIC_TIME infrastructure and 
> adds clocksource structures for both TSC and HPET (ACPI PM is shared w/ 
> i386).

printk timestamping shows a time of zero all the time, because nothing
calls set_cyc2ns_scale() any more.

I stuck it in time_init():

--- a/arch/x86_64/kernel/time.c~time-x86_64-convert-x86_64-to-use-generic_time-fix
+++ a/arch/x86_64/kernel/time.c
@@ -361,6 +361,7 @@ void __init time_init(void)
 		vgetcpu_mode = VGETCPU_LSL;
+	set_cyc2ns_scale(cpu_khz);
 	printk(KERN_INFO "time.c: Detected %d.%03d MHz processor.\n",
 		cpu_khz / 1000, cpu_khz % 1000);
 	setup_irq(0, &irq0);

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