static uint find_free_dqentry(struct qtree_mem_dqinfo *info,
			      struct dquot *dquot, int *err)
{
	uint blk, i;
	struct qt_disk_dqdbheader *dh;
	char *buf = kmalloc(info->dqi_usable_bs, GFP_NOFS);
	char *ddquot;

	*err = 0;
	if (!buf) {
		*err = -ENOMEM;
		return 0;
	}
	dh = (struct qt_disk_dqdbheader *)buf;
	if (info->dqi_free_entry) {
		blk = info->dqi_free_entry;
		*err = read_blk(info, blk, buf);
		if (*err < 0)
			goto out_buf;
	} else {
		blk = get_free_dqblk(info);
		if ((int)blk < 0) {
			*err = blk;
			kfree(buf);
			return 0;
		}
		memset(buf, 0, info->dqi_usable_bs);
		/* This is enough as the block is already zeroed and the entry
		 * list is empty... */
		info->dqi_free_entry = blk;
		mark_info_dirty(dquot->dq_sb, dquot->dq_id.type);
	}
	/* Block will be full? */
	if (le16_to_cpu(dh->dqdh_entries) + 1 >= qtree_dqstr_in_blk(info)) {
		*err = remove_free_dqentry(info, buf, blk);
		if (*err < 0) {
			quota_error(dquot->dq_sb, "Can't remove block (%u) "
				    "from entry free list", blk);
			goto out_buf;
		}
	}
	le16_add_cpu(&dh->dqdh_entries, 1);
	/* Find free structure in block */
	ddquot = buf + sizeof(struct qt_disk_dqdbheader);
	for (i = 0; i < qtree_dqstr_in_blk(info); i++) {
		if (qtree_entry_unused(info, ddquot))
			break;
		ddquot += info->dqi_entry_size;
	}
#ifdef __QUOTA_QT_PARANOIA
	if (i == qtree_dqstr_in_blk(info)) {
		quota_error(dquot->dq_sb, "Data block full but it shouldn't");
		*err = -EIO;
		goto out_buf;
	}
#endif
	*err = write_blk(info, blk, buf);
	if (*err < 0) {
		quota_error(dquot->dq_sb, "Can't write quota data block %u",
			    blk);
		goto out_buf;
	}
	dquot->dq_off = ((loff_t)blk << info->dqi_blocksize_bits) +
			sizeof(struct qt_disk_dqdbheader) +
			i * info->dqi_entry_size;
	kfree(buf);
	return blk;
out_buf:
	kfree(buf);
	return 0;
}
static uint find_free_dqentry(struct qtree_mem_dqinfo *info,
			      struct dquot *dquot, int *err)
{
	uint blk, i;
	struct qt_disk_dqdbheader *dh;
	char *buf = kmalloc(info->dqi_usable_bs, GFP_NOFS);
	char *ddquot;

	*err = 0;
	if (!buf) {
		*err = -ENOMEM;
		return 0;
	}
	dh = (struct qt_disk_dqdbheader *)buf;
	if (info->dqi_free_entry) {
		blk = info->dqi_free_entry;
		*err = read_blk(info, blk, buf);
		if (*err < 0)
			goto out_buf;
	} else {
		blk = get_free_dqblk(info);
		if ((int)blk < 0) {
			*err = blk;
			kfree(buf);
			return 0;
		}
		memset(buf, 0, info->dqi_usable_bs);
		 
		info->dqi_free_entry = blk;
		mark_info_dirty(dquot->dq_sb, dquot->dq_id.type);
	}
	 
	if (le16_to_cpu(dh->dqdh_entries) + 1 >= qtree_dqstr_in_blk(info)) {
		*err = remove_free_dqentry(info, buf, blk);
		if (*err < 0) {
			quota_error(dquot->dq_sb, "Can't remove block (%u) "
				    "from entry free list", blk);
			goto out_buf;
		}
	}
	le16_add_cpu(&dh->dqdh_entries, 1);
	 
	ddquot = buf + sizeof(struct qt_disk_dqdbheader);
	for (i = 0; i < qtree_dqstr_in_blk(info); i++) {
		if (qtree_entry_unused(info, ddquot))
			break;
		ddquot += info->dqi_entry_size;
	}
#ifdef __QUOTA_QT_PARANOIA
	if (i == qtree_dqstr_in_blk(info)) {
		quota_error(dquot->dq_sb, "Data block full but it shouldn't");
		*err = -EIO;
		goto out_buf;
	}
#endif
	*err = write_blk(info, blk, buf);
	if (*err < 0) {
		quota_error(dquot->dq_sb, "Can't write quota data block %u",
			    blk);
		goto out_buf;
	}
	dquot->dq_off = ((loff_t)blk << info->dqi_blocksize_bits) +
			sizeof(struct qt_disk_dqdbheader) +
			i * info->dqi_entry_size;
	kfree(buf);
	return blk;
out_buf:
	kfree(buf);
	return 0;
}