PUD_MASKED_BITS 252 arch/powerpc/include/asm/book3s/64/pgtable.h #define PUD_MASKED_BITS 0xc0000000000000ffUL PUD_MASKED_BITS 47 arch/powerpc/include/asm/nohash/64/pgtable-4k.h #define PUD_MASKED_BITS 0