> +static int exfat_file_zeroed_range(struct file *file, loff_t start, loff_t
> end)
> +{
> + int err;
> + struct inode *inode = file_inode(file);
> + struct exfat_inode_info *ei = EXFAT_I(inode);
> + struct address_space *mapping = inode->i_mapping;
> + const struct address_space_operations *ops = mapping->a_ops;
> +
> + while (start < end) {
> + u32 zerofrom, len;
> + struct page *page = NULL;
> +
> + zerofrom = start & (PAGE_SIZE - 1);
> + len = PAGE_SIZE - zerofrom;
> + if (start + len > end)
> + len = end - start;
> +
> + err = ops->write_begin(file, mapping, start, len, &page, NULL);
Is there any reason why you don't use block_write_begin and
generic_write_end() ?
Thanks.
> + if (err)
> + goto out;
> +
> + zero_user_segment(page, zerofrom, zerofrom + len);
> +
> + err = ops->write_end(file, mapping, start, len, len, page, NULL);
> + if (err < 0)
> + goto out;
> + start += len;
> +
> + balance_dirty_pages_ratelimited(mapping);
> + cond_resched();
> + }
> +
> + ei->valid_size = end;
> + mark_inode_dirty(inode);
> +
> +out:
> + return err;
> +}
