150 	bufhead.b_next = bufhead.b_prev = &bufhead;  in bufinit()
168 		bp->b_prev = &bufhead;  in bufinit()
169 		bp->b_next = bufhead.b_next;  in bufinit()
170 		bufhead.b_next->b_prev = bp;  in bufinit()
171 		bufhead.b_next = bp;  in bufinit()
174 	bufhead.b_size = i;	/* save number of buffers */  in bufinit()
185 	for (bp = bufhead.b_next; bp != &bufhead; bp = bp->b_next)  in getdatablk()
188 	for (bp = bufhead.b_prev; bp != &bufhead; bp = bp->b_prev)  in getdatablk()
191 	if (bp == &bufhead)  in getdatablk()
198 	bp->b_prev = &bufhead;  in getdatablk()
199 	bp->b_next = bufhead.b_next;  in getdatablk()
200 	bufhead.b_next->b_prev = bp;  in getdatablk()
201 	bufhead.b_next = bp;  in getdatablk()
298 	for (bp = bufhead.b_prev; bp && bp != &bufhead; bp = nbp) {  in ckfini()
305 	if (bufhead.b_size != cnt)  in ckfini()
306 		errexit("Panic: lost %d buffers", bufhead.b_size - cnt);  in ckfini()