>> ... This patch deals with the cpu_data array of
>> cpuinfo_x86 structs. The model that was used in sparc64
>> architecture was adopted for x86.
>>
>
> This has mysteriously started to oops on me, only on x86_64.
>
>
http://userweb.kernel.org/~akpm/config-x.txt
>
http://userweb.kernel.org/~akpm/dsc00001.jpg
>
> which is a bit strange since this patch doesn't touch sched.c. Maybe
> there's something somewhere else in the -mm lineup which when combined with
> this prevents it from oopsing, dunno. I'll hold it back for now and will
> see what happens.
>