Re: 2.6.9 kexec patch causes kernel panic during reboot on x86-64

[Andrew Morton]

"H. J. Lu" <hjl@xxxxxxxxx> wrote:
>
> 2.6.9 kexec patch adds a call to find_isa_irq_pin in disable_IO_APIC.
>  But find_isa_irq_pin is marked __init on x86-64, which leads to
>  kernel panic. This patch should fix it.
> 
> 
>  H.J.
>  --- linux-2.6.8/arch/x86_64/kernel/io_apic.c.init	2004-10-14 16:21:44.000000000 -0700
>  +++ linux-2.6.8/arch/x86_64/kernel/io_apic.c	2004-10-15 14:34:53.615495099 -0700
>  @@ -332,7 +332,7 @@ static int __init find_irq_entry(int api
>   /*
>    * Find the pin to which IRQ[irq] (ISA) is connected
>    */
>  -static int __init find_isa_irq_pin(int irq, int type)
>  +static int find_isa_irq_pin(int irq, int type)
>   {

Yup, there are several such fixups needed.  See
ftp://ftp.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.9-rc4/2.6.9-rc4-mm1/broken-out/assign_irq_vector-section-fix.patch.

If you're testing kexec you might be better off using 2.6.9-rc4-mm1 (minus
ftp://ftp.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.9-rc4/2.6.9-rc4-mm1/broken-out/optimize-profile-path-slightly.patch)
because it has the latest kexec version (it had better be!) and whatever
fixups people have found against it.

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