L_PMD_SECT_VALID
#define pmd_present(pmd) (pmd_isset((pmd), L_PMD_SECT_VALID))
return __pmd(pmd_val(pmd) & ~L_PMD_SECT_VALID);
L_PMD_SECT_VALID | L_PMD_SECT_NONE;
pmd_val(pmd) &= ~L_PMD_SECT_VALID;