static ssize_t read_blk(struct qtree_mem_dqinfo *info, uint blk, char *buf)
{
	struct super_block *sb = info->dqi_sb;

	memset(buf, 0, info->dqi_usable_bs);
	return sb->s_op->quota_read(sb, info->dqi_type, buf,
	       info->dqi_usable_bs, (loff_t)blk << info->dqi_blocksize_bits);
}
static ssize_t read_blk(struct qtree_mem_dqinfo *info, uint blk, char *buf)
{
	struct super_block *sb = info->dqi_sb;

	memset(buf, 0, info->dqi_usable_bs);
	return sb->s_op->quota_read(sb, info->dqi_type, buf,
	       info->dqi_usable_bs, (loff_t)blk << info->dqi_blocksize_bits);
}