172 } lbuf[NBUF], bhdr;  variable
612 	bhdr.fwd = bhdr.back = &bhdr;  in main()
1825 			for (bp = bhdr.fwd; bp != &bhdr; bp = bp->fwd)  in main()
3172 	    lblkno(fs, addr) != (bhdr.fwd)->blkno)) {  in syncshadowscan()
3323 	for (bp = bhdr.fwd; bp != &bhdr; bp = bp->fwd)  in getblk()
3327 	bp = bhdr.back;  in getblk()
3357 	bp->back = &bhdr;  in insert()
3358 	bp->fwd = bhdr.fwd;  in insert()
3359 	bhdr.fwd->back = bp;  in insert()
3360 	bhdr.fwd = bp;  in insert()
4770 	if (lblkno(fs, addr) == (bhdr.fwd)->blkno)