diff options
Diffstat (limited to 'arch/powerpc/include/asm/sparsemem.h')
| -rw-r--r-- | arch/powerpc/include/asm/sparsemem.h | 13 |
1 files changed, 10 insertions, 3 deletions
diff --git a/arch/powerpc/include/asm/sparsemem.h b/arch/powerpc/include/asm/sparsemem.h index bc66712bdc3c..28f5dae25db6 100644 --- a/arch/powerpc/include/asm/sparsemem.h +++ b/arch/powerpc/include/asm/sparsemem.h @@ -6,13 +6,20 @@ #ifdef CONFIG_SPARSEMEM /* * SECTION_SIZE_BITS 2^N: how big each section will be - * MAX_PHYSADDR_BITS 2^N: how much physical address space we have * MAX_PHYSMEM_BITS 2^N: how much memory we can have in that space */ #define SECTION_SIZE_BITS 24 - -#define MAX_PHYSADDR_BITS 46 +/* + * If we store section details in page->flags we can't increase the MAX_PHYSMEM_BITS + * if we increase SECTIONS_WIDTH we will not store node details in page->flags and + * page_to_nid does a page->section->node lookup + * Hence only increase for VMEMMAP. + */ +#ifdef CONFIG_SPARSEMEM_VMEMMAP +#define MAX_PHYSMEM_BITS 47 +#else #define MAX_PHYSMEM_BITS 46 +#endif #endif /* CONFIG_SPARSEMEM */ |