# Re: \[PATCH v3 2/2\] powerpc32: fix check\_io\_access()

- From: Scott Wood \<oss@buserror.net\>
- Date: 2016-07-09 07:13:24 
- List: linuxppc-dev
- Page: https://ratatoskr.run/linuxppc-dev/2016/07/4791455
- Thread: https://ratatoskr.run/linuxppc-dev/2016/05/4753283/t.md

```text
On Tue, 2016-05-17 at 14:01 +0200, Christophe Leroy wrote:
> On processors like the 8xx, the machine check exception can also
> happen directly on the load/store instruction itself, so that case
> needs to be handled as well
> 
> Signed-off-by: Christophe Leroy <redacted>
> ---

What machine checks are happening that this is handling?  Is there still 8xx
code that probes for registers that might not be there?

-Scott
```