linux-kernel - Re: [PATCH] x86: let 64 bit to use 32 bit calibrate_apic

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Message-ID: <86802c440808250104i51d438eboe58dc1cc731b545e@mail.gmail.com>
Date:	Mon, 25 Aug 2008 01:04:34 -0700
From:	"Yinghai Lu" <yhlu.kernel@...il.com>
To:	"Ingo Molnar" <mingo@...e.hu>
Cc:	"Thomas Gleixner" <tglx@...utronix.de>,
	"H. Peter Anvin" <hpa@...or.com>,
	"Andrew Morton" <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] x86: let 64 bit to use 32 bit calibrate_apic_clock

On Mon, Aug 25, 2008 at 12:47 AM, Ingo Molnar <mingo@...e.hu> wrote:
>
> * Yinghai Lu <yhlu.kernel@...il.com> wrote:
>
>> Signed-of-by: Yinghai Lu <yhlu.kernel@...il.com>
>
> applied to tip/irq/sparseirq - thanks Yinghai.
>
> btw., why was this bit needed:
>
>> @@ -659,6 +575,7 @@ static int __init calibrate_APIC_clock(v
>>       delta = lapic_cal_t1 - lapic_cal_t2;
>>       apic_printk(APIC_VERBOSE, "... lapic delta = %ld\n", delta);
>>
>> +#ifdef CONFIG_X86_PM_TIMER
>>       /* Check, if the PM timer is available */
>>       deltapm = lapic_cal_pm2 - lapic_cal_pm1;
>>       apic_printk(APIC_VERBOSE, "... PM timer delta = %ld\n", deltapm);
>> @@ -687,6 +604,7 @@ static int __init calibrate_APIC_clock(v
>>               }
>>               pm_referenced = 1;
>>       }
>> +#endif
>
> wouldnt this be a (small) fix for the pre-unification 32-bit side as
> well, which we should put into tip/x86/urgent as well?

64bit have those MACRO, it seems when CONFIG_EMBEDDED is set, could
reduce some size if pm is not selected.

it seems not be urgent for 2.6.27.

YH
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