FMASK
_Static_assert(((FMASK | FCNTLFLAGS) & (FLASTCLOSE | FREVOKE)) == 0,
finit(fp, (flag & FMASK) | (fp->f_flag & FHASLOCK), DTYPE_VNODE,
finit(fp, (flags & FMASK) | (fp->f_flag & FKQALLOWED),
fp->f_flag = flags & FMASK;
fp->f_flag = flags & FMASK;