RADIX_PTE_FRAG_SIZE_SHIFT   17 arch/powerpc/include/asm/book3s/64/radix-4k.h #define RADIX_PTE_FRAG_NR	(PAGE_SIZE >> RADIX_PTE_FRAG_SIZE_SHIFT)
RADIX_PTE_FRAG_SIZE_SHIFT   18 arch/powerpc/include/asm/book3s/64/radix-64k.h #define RADIX_PTE_FRAG_NR	(PAGE_SIZE >> RADIX_PTE_FRAG_SIZE_SHIFT)
RADIX_PTE_FRAG_SIZE_SHIFT  591 arch/powerpc/mm/book3s64/radix_pgtable.c 	__pte_frag_size_shift = RADIX_PTE_FRAG_SIZE_SHIFT;