linux-kernel - Re: mmotm 2008-10-02-16-17 uploaded

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Date:	Tue, 07 Oct 2008 09:18:03 -0700
From:	Yinghai Lu <yinghai@...nel.org>
To:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
CC:	"mingo@...e.hu" <mingo@...e.hu>, linux-kernel@...r.kernel.org,
	akpm@...ux-foundation.org
Subject: Re: mmotm 2008-10-02-16-17 uploaded

KAMEZAWA Hiroyuki wrote:
> I'm sorry if alread fixed.
> 
> Folloing function in git-x86.patch touches invalid address.
> ==
> +void __init early_cpu_init(void)
> +{
> +       struct cpu_dev **cdev;
> +       int count = 0;
> +
> +       printk("KERNEL supported cpus:\n");
> +       for (cdev = __x86_cpu_dev_start; cdev < __x86_cpu_dev_end; cdev++) {
> +               struct cpu_dev *cpudev = *cdev;
> +               unsigned int j;
> +
> +               if (count >= X86_VENDOR_NUM)
> +                       break;
> +               cpu_devs[count] = cpudev;
> +               count++;
> +
> +               for (j = 0; j < 2; j++) {
> +                       if (!cpudev->c_ident[j])
> +                               continue;
> +                       printk("  %s %s\n", cpudev->c_vendor,
> +                               cpudev->c_ident[j]);
> +               }
> +       }
> +
> +       early_identify_cpu(&boot_cpu_data);
>  }
> ==
> printk("  %s %s\n", cpudev->c_vendor, cpudev->c_ident[j]);
> touches invalid address. (following is printk() result by
> replacing %s with %p.
> ==
>   ffffffff8066e38a ffffffff8066e383
>   ffffffff8066e3ab ffffffff8066e3a2
>   ffffffff8066e3af ffffffff8066e3b7
>   807064c0c7c74855 08ec834853e58948
>   807064c0c7c74855 74c085fffffe9fe8
> ==
> and the kernel never boots on my box.

could be merging problem again.

please check in arch/x86/kernel/vmliux_64.lds.S

it should be like 

  __con_initcall_end = .;
  __x86_cpu_dev_start = .;
  .x86_cpu_dev.init : AT(ADDR(.x86_cpu_dev.init) - LOAD_OFFSET) {
        *(.x86_cpu_dev.init)
  }
  __x86_cpu_dev_end = .;

  DYN_ARRAY_INIT(8)

  SECURITY_INIT


YH


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