affs_remove_hash
extern int affs_remove_hash(struct inode *dir, struct buffer_head *rem_bh);
retval = affs_remove_hash(dir, link_bh);
retval = affs_remove_hash(dir, bh);
retval = affs_remove_hash(old_dir, bh);
retval = affs_remove_hash(old_dir, bh_old);
retval = affs_remove_hash(new_dir, bh_new);