ocfs2_inode_lock_nested
status = ocfs2_inode_lock_nested(dir, NULL, 0, OI_LS_PARENT);
status = ocfs2_inode_lock_nested(inode2, bh2, 1,
status = ocfs2_inode_lock_nested(inode1, bh1, 1,
status = ocfs2_inode_lock_nested(old_inode, &old_inode_bh, 1,
status = ocfs2_inode_lock_nested(dir, &parent_node_bh, 1,
ret = ocfs2_inode_lock_nested(new_inode, &new_bh, 1,
status = ocfs2_inode_lock_nested(inode1, &bh1, 1,
status = ocfs2_inode_lock_nested(inode2, &bh2, 1,