# Re: \[PATCH v2\] sparc64: Add support for Application Data Integrity (ADI)

- From: Rob Gardner \<hidden\>
- Date: 2016-03-07 23:35:46 
- List: linux-api
- Page: https://ratatoskr.run/linux-api/2016/03/4703520
- Thread: https://ratatoskr.run/sparclinux/2016/03/4699675/t.md

```text
On 03/07/2016 10:24 AM, Khalid Aziz wrote:
>
> Tags can be cleared by user by setting tag to 0. Tags are automatically cleared by the hardware when the mapping for a virtual address is removed from TSB (which is why swappable pages are a problem), so kernel does not have to do it as part of clean up.
>

I don't understand this. The hardware isn't involved  when a mapping for a virtual address is removed from the TSB, so how could it automatically clear tags?

Rob

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