_DESCTYPE_MASK    138 include/asm-m68k/motorola_pgtable.h #define pmd_bad(pmd)		((pmd_val(pmd) & _DESCTYPE_MASK) != _PAGE_TABLE)
_DESCTYPE_MASK    150 include/asm-m68k/motorola_pgtable.h #define pgd_bad(pgd)		((pgd_val(pgd) & _DESCTYPE_MASK) != _PAGE_TABLE)