On Wed, Feb 05, 2020 at 10:32:05AM -0800, Christoph Hellwig wrote: > > 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. Given dcssblk is the only user, I am inclined to get rid of genric version. We can add one later if another user shows up. Thanks Vivek -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel