RADIX_PMD_FRAG_NR   20 arch/powerpc/include/asm/book3s/64/radix-4k.h #define RADIX_PMD_FRAG_NR	(PAGE_SIZE >> RADIX_PMD_FRAG_SIZE_SHIFT)
RADIX_PMD_FRAG_NR   21 arch/powerpc/include/asm/book3s/64/radix-64k.h #define RADIX_PMD_FRAG_NR	(PAGE_SIZE >> RADIX_PMD_FRAG_SIZE_SHIFT)