# Re: \[PATCH v3 02/25\] drm: core: fix common struct sg\_table related issues

- From: Christoph Hellwig \<hch@lst.de\>
- Date: 2020-05-08 07:16:15 
- List: linux-arm-kernel
- Page: https://ratatoskr.run/linux-arm-kernel/2020/05/5957682
- Thread: https://ratatoskr.run/linux-arm-kernel/2020/05/5953055/t.md

```text
On Fri, May 08, 2020 at 09:12:13AM +0200, Marek Szyprowski wrote:
> Then we would just need one more helper to construct scatterlist, as the 
> above two are read-only don't allow to modify scatterlist:
> 
> #define for_each_sgtable_sg(sgt, sg, i)                \
>         for_each_sg(sgt->sgl, sg, sgt->orig_nents, i)
> 
> With the above 3 helpers we can probably get rid of all instances of 
> sg_table->{nents,orig_nents} from the DRM code. I will prepare patches soon.

Sounds great, thanks!

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