REGION_ID          67 arch/powerpc/include/asm/nohash/64/pgtable.h #define VMALLOC_REGION_ID	(REGION_ID(VMALLOC_START))
REGION_ID          68 arch/powerpc/include/asm/nohash/64/pgtable.h #define KERNEL_REGION_ID	(REGION_ID(PAGE_OFFSET))