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Date: Mon, 17 Apr 2006 23:12:35 -0700
From: Andrew Morton <akpm@osdl.org>
To: David Wilder <dwilder@us.ibm.com>
Subject: Re: [PATCH] ppc64-soft-reset-fixes
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David Wilder <dwilder@us.ibm.com> wrote:
>
>  - For the crash scenario, when a CPU hangs with interrupts disabled and 
>  the other CPUs panic or user invoked kdump boot using sysrq-c. In this 
>  case, the hung CPU can not be stopped and causes the kdump boot not 
>  successful. This case can be treated as complete system hang and asks 
>  the user to activate soft-reset if all secondary CPUs are not stopped.

It breaks `make allmodconfig':

arch/powerpc/kernel/built-in.o(.toc+0x2a00): In function `PPC64_CACHES':
: undefined reference to `kexec_crash_image'