xfs_btree_magic
__u32 magic = xfs_btree_magic(mp, ops);
if (be32_to_cpu(block->bb_magic) != xfs_btree_magic(mp, cur->bc_ops))
if (be32_to_cpu(block->bb_magic) != xfs_btree_magic(mp, cur->bc_ops))
uint32_t xfs_btree_magic(struct xfs_mount *mp, const struct xfs_btree_ops *ops);