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#ifndef _ASM_X86_64_SPARSEMEM_H #define _ASM_X86_64_SPARSEMEM_H 1 #ifdef CONFIG_SPARSEMEM /* * generic non-linear memory support: * * 1) we will not split memory into more chunks than will fit into the flags * field of the struct page * * SECTION_SIZE_BITS 2^n: size of each section * MAX_PHYSADDR_BITS 2^n: max size of physical address space * MAX_PHYSMEM_BITS 2^n: how much memory we can have in that space * */ #define SECTION_SIZE_BITS 27 /* matt - 128 is convenient right now */ #define MAX_PHYSADDR_BITS 40 #define MAX_PHYSMEM_BITS 40 extern int early_pfn_to_nid(unsigned long pfn); #endif /* CONFIG_SPARSEMEM */ #endif /* _ASM_X86_64_SPARSEMEM_H */