dwbuf
dwp = (struct buf *)&dwbuf[ix];
dwbuf = kmem_zalloc(v.v_hbuf * sizeof (struct dwbuf), KM_SLEEP);
dwbuf[i].b_forw = dwbuf[i].b_back = (struct buf *)&dwbuf[i];
dwbuf[i].av_forw = dwbuf[i].av_back = (struct buf *)&dwbuf[i];
dwp = (struct buf *)&dwbuf[start];
dp = (struct buf *)&dwbuf[index];
struct dwbuf *dwbuf; /* Delayed write buckets */
dp = (struct buf *)&dwbuf[i];
extern struct dwbuf *dwbuf; /* delayed write hash table */