FS_Q_OVERFLOW
BUILD_BUG_ON(FAN_Q_OVERFLOW != FS_Q_OVERFLOW);
fanotify_init_event(oevent, 0, FS_Q_OVERFLOW);
oevent->mask = FS_Q_OVERFLOW;
BUILD_BUG_ON(IN_Q_OVERFLOW != FS_Q_OVERFLOW);
FS_UNMOUNT | FS_Q_OVERFLOW | FS_IN_IGNORED | \
return mask & FS_Q_OVERFLOW;