RADIX_VMEMMAP_START  111 arch/powerpc/include/asm/book3s/64/radix.h #define RADIX_VMEMMAP_END	(RADIX_VMEMMAP_START + RADIX_VMEMMAP_SIZE)
RADIX_VMEMMAP_START  584 arch/powerpc/mm/book3s64/radix_pgtable.c 	vmemmap = (struct page *)RADIX_VMEMMAP_START;