XFS_BUF_DADDR_NULL  270 fs/xfs/linux-2.6/xfs_buf.c 	bp->b_bn = XFS_BUF_DADDR_NULL;
XFS_BUF_DADDR_NULL 1077 fs/xfs/linux-2.6/xfs_buf.c 	BUG_ON(bp->b_bn == XFS_BUF_DADDR_NULL);