# Re: \[PATCH v3\] loop: reduce the loop\_ctl\_mutex scope

- From: Christoph Hellwig \<hch@lst.de\>
- Date: 2021-08-30 07:13:54 
- List: linux-block
- Page: https://ratatoskr.run/linux-block/2021/08/6405112
- Thread: https://ratatoskr.run/linux-block/2021/08/6405025/t.md

```text
Hi Tetsuo,

this generally looks fine to me.  The only issue is that I remember is
that cmpxchg did historically not work on bool on all architectures.
I'm not sure if this has been fixed since.
```