> diff --git a/drivers/s390/block/dcssblk.c b/drivers/s390/block/dcssblk.c
> index 63502ca537eb..f6709200bcd0 100644
> --- a/drivers/s390/block/dcssblk.c
> +++ b/drivers/s390/block/dcssblk.c
> @@ -62,6 +62,7 @@ static const struct dax_operations dcssblk_dax_ops = {
> .dax_supported = generic_fsdax_supported,
> .copy_from_iter = dcssblk_dax_copy_from_iter,
> .copy_to_iter = dcssblk_dax_copy_to_iter,
> + .zero_page_range = dcssblk_dax_zero_page_range,
> };
>
> struct dcssblk_dev_info {
> @@ -941,6 +942,12 @@ dcssblk_dax_direct_access(struct dax_device *dax_dev, pgoff_t pgoff,
> return __dcssblk_direct_access(dev_info, pgoff, nr_pages, kaddr, pfn);
> }
>
> +static int dcssblk_dax_zero_page_range(struct dax_device *dax_dev,pgoff_t pgoff,
> + unsigned offset, size_t len)
> +{
> + return generic_dax_zero_page_range(dax_dev, pgoff, offset, len);
> +}
Wouldn't this need a forward declaration? Then again given that dcssblk
is the only caller of generic_dax_zero_page_range we might as well merge
the two. If you want to keep the generic one it could be wired up to
dcssblk_dax_ops directly, though.
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