Getting a person's attention who can and will do something is still challenging if you don't know whom, which is the same problem I saw sending patches to Linux mailing lists which went unanswered, and was given no specific feedback or path forward privately contacting the corporate maintainers.
Send an email to the dev list with a patch. Same as Linux, Git itself, and a lot of other projects.
Just out of curiosity, why the Sparc laptop? While I'd love to find one today to tinker with, I assume anyone who had one back then was mainly working on sun machine's / unix and needed some at home familiarity.
Nowadays it runs SunOS 4.1 with a port of KDE 1 on it, and netboots Sprite for fun.
Of course, after porting the Sprite kernel to said laptop, I learned why the Linux kernel is littered with comments like this, and why it was never quite the beautiful, elegant, UNIX :tm: machine I imagined it was.
/*
* Are you now convinced that the Swift is one of the
* biggest VLSI abortions of all time? Bravo Fujitsu!
* Fujitsu, the !#?!%$'d up processor people. I bet if
* you examined the microcode of the Swift you'd find
* XXX's all over the place.
*/
(of course, the laptop itself is lovely -- the plastic shell has a nice rounded edge for your wrists, and the keyboard uses proper mechanical switches that feel much nicer than actual Sun keyboards of that era)