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SubjectRe: [RFC] [PATCH] virtual memmap on sparsemem v3 [3/4] static virtual mem_map
On Fri, 8 Dec 2006 16:30:20 -0800
Andrew Morton <> wrote:

> > +#include <linux/mm_types.h>
> > +extern struct page mem_map[];
> > +#else
> > extern struct page* mem_map;
> > #endif
> > +#endif
> This looks rather unpleasant - what went wrong here?
definition of 'struct page' is necessary before declearing array[]. (for gcc-4.0)

> Would prefer to unconditionally include the header file - conditional inclusions
> like this can cause compile failures when someone changes a config option. They
> generally raise the complexity level.
Now, forward declearation of 'struct page' is in mmzone.h.
I'll remove it and include mm_types.h instead of it.
If someone says "Don't do that", I'll look for anothere way.


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