linux-kernel - Re: [PATCH -mm 4/5][time][x86_64] Convert x86_64 to use GENERIC

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Date:	Wed, 27 Dec 2006 17:24:47 -0800
From:	Andrew Morton <akpm@...l.org>
To:	john stultz <johnstul@...ibm.com>
Cc:	Andi Kleen <ak@...e.de>, linux-kernel@...r.kernel.org,
	tglx@...utronix.de, mingo@...e.hu, Valdis.Kletnieks@...edu
Subject: Re: [PATCH -mm 4/5][time][x86_64] Convert x86_64 to use
 GENERIC_TIME

On Wed, 20 Dec 2006 17:13:43 -0500
john stultz <johnstul@...ibm.com> 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)
 	else
 		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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