ATTR_DEFMASK
flags &= ~ATTR_DEFMASK;
if (((s) & ~(ATTR_DEFMASK | (m))) != (t)) pflags = 1
(((s) & ~(ATTR_DEFMASK | (m))) == (t))
flags &= ~ATTR_DEFMASK; /* normalize mask */
flags &= ~ATTR_DEFMASK; /* normalize mask */
flags &= ~ATTR_DEFMASK;