It’s a duplication of functionality in kernel/dma.

That’s why the submitter didn’t say “I didn’t submit to kernel/dma, checkmate libs!”.

The intent is to duplicate functionality in kernel/dma then get it included directly or linked to.

That’s what the r4l project is trying to do explicitly!

Before you say that kernel/dma didn’t have functional easy to use rust bindings, so the commit couldn’t have duplicated functionality: someone on kernel/dma said they didn’t want that and suggested using the c bindings instead which is what every other language has to do. Which means there was already a solution that was functional.

It’s like if there’s a community bicycle and you bring your drill and tap set so you can mount your bottle caddy and the community says “please don’t make a hole we have to tig in. Just use a pipe strap.” The right answer isn’t to start building a whole new down tube you can tap for an m5 for your bottle caddy, it’s to just use a pipe strap for your bottle caddy.

I didn’t read the linked article (or any linked article about this) because I’ve been reading the mailing list. Reporting on the kernel and people’s behavior on the list is tiring and often includes a bunch of baseless speculation.