# Re: \[PATCH v8 11/12\] zram: fix crashes with cpu hotplug multistate

- From: Luis Chamberlain \<mcgrof@kernel.org\>
- Date: 2021-10-19 16:30:30 
- List: linux-doc
- Page: https://ratatoskr.run/linux-doc/2021/10/216494
- Thread: https://ratatoskr.run/linux-doc/2021/09/215052/t.md

```text
On Tue, Oct 19, 2021 at 06:25:18PM +0200, Greg KH wrote:
> On Tue, Oct 19, 2021 at 08:50:24AM -0700, Luis Chamberlain wrote:
> > So do you want to take the position:
> > 
> > Hey driver authors: you cannot use any shared lock on module removal and
> > on sysfs ops?
> 
> Yes, I would not recommend using such a lock at all.  sysfs operations
> happen on a per-device basis, so you can lock the device structure.

All devices are going to be removed on module removal and so cannot be locked.

  Luis
```