Re: [PATCH v6 1/4] drm: Use XArray instead of IDR for minors

[Matthew Wilcox]

On Tue, Aug 29, 2023 at 02:35:34PM -0400, James Zhu wrote:
> 
> On 2023-08-29 14:33, Matthew Wilcox wrote:
> > On Tue, Aug 29, 2023 at 01:34:22PM -0400, James Zhu wrote:
> > > > > > @@ -1067,7 +1055,7 @@ static void drm_core_exit(void)
> > > > > >     	unregister_chrdev(DRM_MAJOR, "drm");
> > > > > >     	debugfs_remove(drm_debugfs_root);
> > > > > >     	drm_sysfs_destroy();
> > > > > > -	idr_destroy(&drm_minors_idr);
> > > > > [JZ] Should we call xa_destroy instead here?
> > > > We could, if we expect the xarray to potentially not be empty.
> > > >   From what I understand - all minors should be released at this point.
> > > [JZ] In practice,  adding destroy here will be better.
> > Why do you say that?
> [JZ] In case, the future, INIT adds something, need DESTROY to free
> completely.

That isn't going to happen.