ud_putpages
int32_t ud_putpages(struct vnode *, offset_t, size_t, int32_t, struct cred *);
error = ud_putpages(vp, doff, dlen, flags, cr);
error = ud_putpages(vp, off, len, flags, cr);
(void) ud_putpages(vp, ip->i_delayoff, ip->i_delaylen,