H_PMD_FRAG_SIZE_SHIFT   57 arch/powerpc/include/asm/book3s/64/hash-4k.h #define H_PMD_FRAG_NR	(PAGE_SIZE >> H_PMD_FRAG_SIZE_SHIFT)
H_PMD_FRAG_SIZE_SHIFT   67 arch/powerpc/include/asm/book3s/64/hash-64k.h #define H_PMD_FRAG_NR	(PAGE_SIZE >> H_PMD_FRAG_SIZE_SHIFT)
H_PMD_FRAG_SIZE_SHIFT 1008 arch/powerpc/mm/book3s64/hash_utils.c 	__pmd_frag_size_shift = H_PMD_FRAG_SIZE_SHIFT;