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Linus responds to Hellwig - "the pull request you objected to DID NOT TOUCH THE DMA LAYER AT ALL... if you as a maintainer feel that you control who or what can use your code, YOU ARE WRONG." (lore.kernel.org)

submitted 1 day ago by [email protected] to c/linux

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Hellwig is the maintainer of the DMA subsystem. Hellwig previously blocked rust bindings for DMA code, which in part resulted in Hector Martin from stepping down as a kernel maintainer and eventually Asahi Linux as a whole.

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[–] [email protected] 6 points 21 hours ago (1 children)

Last time around Asahi Lina (major contributor to the Apple Silicon GPU driver) made a very nice writeup on mastodon about her attempts to mainline her work.

Part of the problem was that the C interface was straight-up broken; not only were a bunch of lifetimes undocumented, but freeing the kernel objects properly was impossible, but GCC doesn't care and neither did anyone because GPU drivers are expected to just... never exit (IIRC). So she refactored it to be saner.

Anyway apparently it was rejected for much the same reasons, aka Rust bashing thinly disguised as concerns over maintainability.

Technically the R4L project did have an impact. But what's the worst case? Spending some time on improving the C interface for an edge case? The ignominy! NAK.

[–] FizzyOrange 1 points 20 hours ago

To be clear I fully support Rust in Linux. I just think it's going to rapidly be impractical to work on Linux without learning Rust.

The solution isn't to pretend that isn't the case; it's to learn Rust!