kern/58441: drm_gem fence array issues

[campbell+netbsd%mumble.net@localhost]

>Number:         58441
>Category:       kern
>Synopsis:       drm_gem fence array issues
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Thu Jul 18 15:20:00 +0000 2024
>Originator:     Taylor R Campbell
>Release:        current, 10
>Organization:
The FenceBSD Arrayndation
>Environment:
>Description:
Some issues were fixed in drm_gem fence arrays:

https://mail-index.netbsd.org/source-changes/2024/05/22/msg151510.html
https://mail-index.netbsd.org/source-changes/2024/05/22/msg151511.html
https://mail-index.netbsd.org/source-changes/2024/05/22/msg151512.html

Need to determine whether they are potentially applicable to anything that might be pulled up to 10.
>How-To-Repeat:

>Fix: