177 	struct	lbuf  *fwd;  member
622 	bhdr.fwd = bhdr.back = &bhdr;  in main()
1835 			for (bp = bhdr.fwd; bp != &bhdr; bp = bp->fwd)  in main()
3182 	    lblkno(fs, addr) != (bhdr.fwd)->blkno)) {  in syncshadowscan()
3333 	for (bp = bhdr.fwd; bp != &bhdr; bp = bp->fwd)  in getblk()
3353 xit:	bp->back->fwd = bp->fwd;  in getblk()
3354 	bp->fwd->back = bp->back;  in getblk()
3368 	bp->fwd = bhdr.fwd;  in insert()
3369 	bhdr.fwd->back = bp;  in insert()
3370 	bhdr.fwd = bp;  in insert()
4780 	if (lblkno(fs, addr) == (bhdr.fwd)->blkno)