BMBT_STARTBLOCK_BITLEN  110 fs/xfs/libxfs/xfs_bmap_btree.c 	ASSERT(!(s->br_startblock & xfs_mask64hi(64-BMBT_STARTBLOCK_BITLEN)));
BMBT_STARTBLOCK_BITLEN   30 fs/xfs/libxfs/xfs_iext_tree.c #define XFS_IEXT_STARTBLOCK_MASK	xfs_mask64lo(BMBT_STARTBLOCK_BITLEN)