DAX_ZERO_PAGE 117 fs/dax.c return xa_to_value(entry) & DAX_ZERO_PAGE; DAX_ZERO_PAGE 725 fs/dax.c if (dax_is_zero_entry(entry) && !(flags & DAX_ZERO_PAGE)) { DAX_ZERO_PAGE 1040 fs/dax.c DAX_ZERO_PAGE, false); DAX_ZERO_PAGE 1434 fs/dax.c DAX_PMD | DAX_ZERO_PAGE, false);