[PATCH] add additional symbols to /sys/kernel/vmcoreinfo data for ppc(64)

[Ken'ichi Ohmichi]

Hi Neil,

I had created similar patch, but your patch is better than mine because
your patch has right configuration dependency. So I think this patch is
fine.

Reviewed-by: Ken'ichi Ohmichi <oomichi at mxs.nes.nec.co.jp>


Thanks
Ken'ichi Ohmichi

* Reference:
http://lists.infradead.org/pipermail/kexec/2008-June/001970.html

Neil Horman wrote:
> Hey-
> 	The makdumpdile dump filtering program, in some modes of operation needs
> the node_data and/or contig_page_data symbols to function properly.  These
> symbols are missing from the powerpc kernel.  This patch adds those symbols in
> properly.  Tested successfully by myself and the reporter.
> 
> Regards
> Neil
> 
> Signed-off-by: Neil Horman <nhorman at tuxdriver.com>
> 
> 
>  machine_kexec.c |   10 ++++++++++
>  1 file changed, 10 insertions(+)
> 
> 
> diff --git a/arch/powerpc/kernel/machine_kexec.c b/arch/powerpc/kernel/machine_kexec.c
> index aab7688..2f9b5aa 100644
> --- a/arch/powerpc/kernel/machine_kexec.c
> +++ b/arch/powerpc/kernel/machine_kexec.c
> @@ -44,6 +44,16 @@ void machine_kexec_cleanup(struct kimage *image)
>  		ppc_md.machine_kexec_cleanup(image);
>  }
>  
> +void arch_crash_save_vmcoreinfo(void)
> +{
> +#ifdef CONFIG_NEED_MULTIPLE_NODES
> +	VMCOREINFO_SYMBOL(node_data);
> +	VMCOREINFO_LENGTH(node_data, MAX_NUMNODES);
> +#else
> +	VMCOREINFO_SYMBOL(contig_page_data);
> +#endif
> +}
> +
>  /*
>   * Do not allocate memory (or fail in any way) in machine_kexec().
>   * We are past the point of no return, committed to rebooting now.