# Re: \[Lse-tech\] \[patch\] SImple Topology API v0.3 (1/2)

- From: Christoph Hellwig \<hch@infradead.org\>
- Date: 2002-08-22 19:18:40 
- List: linux-mm
- Page: https://ratatoskr.run/linux-mm/2002/08/482248
- Thread: https://ratatoskr.run/linux-mm/2002/08/482248/t.md

```text
On Thu, Aug 22, 2002 at 12:13:23PM -0700, Matthew Dobson wrote:
> --- linux-2.5.27-vanilla/include/linux/mmzone.h	Sat Jul 20 12:11:05 2002
> +++ linux-2.5.27-api/include/linux/mmzone.h	Wed Jul 24 17:33:41 2002
> @@ -220,15 +20,15 @@
>  #define NODE_MEM_MAP(nid)	mem_map
>  #define MAX_NR_NODES		1
>  
> -#else /* !CONFIG_DISCONTIGMEM */
> -
> -#include <asm/mmzone.h>
> +#else /* CONFIG_DISCONTIGMEM */
>  
>  /* page->zone is currently 8 bits ... */
>  #define MAX_NR_NODES		(255 / MAX_NR_ZONES)
>  
>  #endif /* !CONFIG_DISCONTIGMEM */
>  
> +#include <asm/mmzone.h>
> +

What is the exact purpose of this change?

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```