# Re: \[PATCH 10/11\] UAPI: ndctl: Remove use of PAGE\_SIZE \[ver \#2\]

- From: Dan Williams \<hidden\>
- Date: 2018-09-25 20:18:09 
- List: linux-api
- Page: https://ratatoskr.run/linux-api/2018/09/5391041
- Thread: https://ratatoskr.run/linux-api/2018/09/143352/t.md

```text
On Thu, Sep 6, 2018 at 2:19 AM David Howells [ref] wrote:
>
> The macro PAGE_SIZE isn't valid outside of the kernel, so it should not
> appear in UAPI headers.
>
> Furthermore, the actual machine page size could theoretically change from
> an application's point of view if it's running in a container that gets
> migrated to another machine (say 4K/ppc64 to 64K/ppc64).
>
> Fixes: f2ba5a5baecf ("libnvdimm, namespace: make min namespace size 4K")
> Signed-off-by: David Howells <redacted>
> cc: Dan Williams <redacted>

Acked-by: Dan Williams <redacted>

Let me know if you want me to pick this up for 4.20.
```