2.5.64-mm8: link error with CONFIG_NUMA and !CONFIG_SMP

[Adrian Bunk <bunk@fs.tum.de>]

I get many errors at the final linking when compiling a kernel with
CONFIG_NUMA enabled but CONFIG_SMP disabled:

<--  snip  -->

...
/home/bunk/linux/kernel-2.5/linux-2.5.64-mm8/include/asm/topology.h:41: 
undefined reference to `cpu_2_node'
...

<--  snip  -->

the problem is that include/asm-i386/topology.h says:

<--  snip  -->

...
#ifdef CONFIG_NUMA
...
extern volatile int cpu_2_node[];
...

<--  snip  -->

but cpu_2_node is in arch/i386/kernel/smpboot.c that only gets included 
with CONFIG_SMP.

cu
Adrian

-- 

       "Is there not promise of rain?" Ling Tan asked suddenly out
        of the darkness. There had been need of rain for many days.
       "Only a promise," Lao Er said.
                                       Pearl S. Buck - Dragon Seed