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

[James Zhu]

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.