Re: [PATCH] mem_map is part of the FLATMEM model

[Andrew Morton <akpm@osdl.org>]

Andy Whitcroft <apw@shadowen.org> wrote:
>
> mem_map is part of the FLATMEM model
> 
> It seems that the definition and declaration of mem_map are
> inconsistent meaning we get usless undirected link failures about
> mem_map when its being used when it shouldn't be.
> 
> Reviewing mem_map, its actually only valid and initialised when
> CONFIG_FLATMEM is defined.  Indeed in all essence it is part
> of that memory model used out of FLATMEM's __pfn_to_page etc.
> mem_map (and max_mapnr) should only be defined and declared when
> the FLATMEM memory model is selected.

sparc64 allmodconfig:

arch/sparc64/mm/init.c: In function `paging_init':
arch/sparc64/mm/init.c:1339: error: `max_mapnr' undeclared (first use in this function)
arch/sparc64/mm/init.c:1339: error: (Each undeclared identifier is reported only once

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