# Re: \[PATCH v2 20/34\] xen: convert put\_page() to put\_user\_page\*()

- From: Juergen Gross \<jgross@suse.com\>
- Date: 2019-08-05 04:15:41 
- List: linux-fbdev
- Page: https://ratatoskr.run/linux-fbdev/2019/08/160425
- Thread: https://ratatoskr.run/linux-mm/2019/08/160378/t.md

```text
On 05.08.19 00:49, john.hubbard@gmail.com wrote:
> From: John Hubbard <jhubbard@nvidia.com>
> 
> For pages that were retained via get_user_pages*(), release those pages
> via the new put_user_page*() routines, instead of via put_page() or
> release_pages().
> 
> This is part a tree-wide conversion, as described in commit fc1d8e7cca2d
> ("mm: introduce put_user_page*(), placeholder versions").
> 
> This also handles pages[i] = NULL cases, thanks to an approach
> that is actually written by Juergen Gross.
> 
> Signed-off-by: Juergen Gross <jgross@suse.com>
> Signed-off-by: John Hubbard <jhubbard@nvidia.com>
> 
> Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com>
> Cc: <redacted>
> ---
> 
> Hi Juergen,
> 
> Say, this is *exactly* what you proposed in your gup.patch, so
> I've speculatively added your Signed-off-by above, but need your
> approval before that's final. Let me know please...

Yes, that's fine with me.


Juergen
```