ocfs2_remove_btree_range
status = ocfs2_remove_btree_range(inode, &et, trunc_cpos,
int ocfs2_remove_btree_range(struct inode *inode,
ret = ocfs2_remove_btree_range(dir, &et, cpos, p_cpos, clen, 0,
ret = ocfs2_remove_btree_range(inode, &et, trunc_cpos,