PGD_ALLOC_ORDER   120 arch/parisc/include/asm/pgtable.h #define PGD_ALLOC_ORDER	(2 + 1) /* first pgd contains pmd */
PGD_ALLOC_ORDER   123 arch/parisc/include/asm/pgtable.h #define PGD_ALLOC_ORDER	(PGD_ORDER + 1)