VRING_DESC_F_NEXT
vd[i].flags = VRING_DESC_F_NEXT;
vd[s].flags = VRING_DESC_F_NEXT;
while (vd[s].flags & VRING_DESC_F_NEXT) {
vd[slot].flags = VRING_DESC_F_NEXT;
while (vd[s].flags & VRING_DESC_F_NEXT) {
if ((desc->flags & VRING_DESC_F_NEXT) == 0) {
while (desc->flags & VRING_DESC_F_NEXT) {
} while ((*desc)->flags & VRING_DESC_F_NEXT);
while (desc->flags & VRING_DESC_F_NEXT) {
while (desc->flags & VRING_DESC_F_NEXT) {
if ((acct.req_desc->flags & VRING_DESC_F_NEXT) == 0) {