VREQ_DONE
ASSERT(VREQ_DONE(BP_VREQ(bp)));
ASSERT(VREQ_DONE(BP_VREQ(vdp->xdf_f_act)));
ASSERT(VREQ_DONE(BP_VREQ(bp_iter)));
if (((vreq = BP_VREQ(bp)) == NULL) || (!VREQ_DONE(vreq)))
if (((vreq = BP_VREQ(bp)) == NULL) || (!VREQ_DONE(vreq)))