linux-kernel - Re: [patch] cpu_early

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Date:	Sun, 15 Nov 2009 09:05:14 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Mike Galbraith <efault@....de>
Cc:	Dave Jones <davej@...hat.com>, LKML <linux-kernel@...r.kernel.org>
Subject: Re: [patch] cpu_early_init() breakage


* Mike Galbraith <efault@....de> wrote:

> Bah, missed quilt refresh after fixing my own typo :)
> 
> 0388423 typo caused loss of vendor data even with CONFIG_PROCESSOR_SELECT.
> 
> [    0.000000] CPU: vendor_id 'GenuineIntel' unknown, using generic init.
> [    0.000000] CPU: Your system may be unstable.
> [    0.044003] MCE: unknown CPU type - not enabling MCE support.
> ...
> [    0.437241] Brought up 4 CPUs
> [    0.440002] Total of 4 processors activated (19139.97 BogoMIPS).
> [    0.448021] CPU0 attaching sched-domain:
> [    0.448024]  domain 0: span 0-3 level MC
> [    0.448026]   groups: 0 1 2 3
> [    0.448031] CPU1 attaching sched-domain:
> [    0.448033]  domain 0: span 0-3 level MC
> [    0.448035]   groups: 1 2 3 0
> [    0.448039] CPU2 attaching sched-domain:
> [    0.448041]  domain 0: span 0-3 level MC
> [    0.448043]   groups: 2 3 0 1
> [    0.448047] CPU3 attaching sched-domain:
> [    0.448048]  domain 0: span 0-3 level MC
> [    0.448050]   groups: 3 0 1 2
> 
> x86: Fix typo in 0388423 "Minimise printk spew from per-vendor init code"
> 
> Signed-off-by: Mike Galbraith <efault@....de>
> Cc: Ingo Molnar <mingo@...e.hu>
> Cc: Dave Jones <davej@...hat.com>
> LKML-Reference: <new-submission>
> 
> ---
>  arch/x86/kernel/cpu/common.c |    6 ++++--
>  1 file changed, 4 insertions(+), 2 deletions(-)
> 
> Index: linux-2.6/arch/x86/kernel/cpu/common.c
> ===================================================================
> --- linux-2.6.orig/arch/x86/kernel/cpu/common.c
> +++ linux-2.6/arch/x86/kernel/cpu/common.c
> @@ -651,11 +651,12 @@ static void __init early_identify_cpu(st
>  
>  void __init early_cpu_init(void)
>  {
> -#ifdef PROCESSOR_SELECT
>  	const struct cpu_dev *const *cdev;
>  	int count = 0;
>  
> +#ifdef CONFIG_PROCESSOR_SELECT
>  	printk(KERN_INFO "KERNEL supported cpus:\n");
> +#endif
>  	for (cdev = __x86_cpu_dev_start; cdev < __x86_cpu_dev_end; cdev++) {
>  		const struct cpu_dev *cpudev = *cdev;
>  		unsigned int j;
> @@ -665,14 +666,15 @@ void __init early_cpu_init(void)
>  		cpu_devs[count] = cpudev;
>  		count++;
>  
> +#ifdef CONFIG_PROCESSOR_SELECT
>  		for (j = 0; j < 2; j++) {
>  			if (!cpudev->c_ident[j])
>  				continue;
>  			printk(KERN_INFO "  %s %s\n", cpudev->c_vendor,
>  				cpudev->c_ident[j]);
>  		}
> -	}
>  #endif

i did the same fix yesterday - could you check latest -tip whether it 
works for you too?

Thanks,

	Ingo
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