NACKs of bad Rust code, or Rust code that you don’t want in the system that you maintain, would be fine. The specific NACK at issue here was a NACK of code that used a maintainer’s API from a language that he didn’t like, which Linus has confirmed is not allowed.
> Maintainers like Hellwig who do not want to integrate Rust do not have to. But they also cannot dictate the language or manner of code that touches their area of control but does not alter it. The pull request Hellwig objected to "DID NOT TOUCH THE DMA LAYER AT ALL," Torvalds writes (all-caps emphasis his), and was "literally just another user of it, in a completely separate subdirectory."
> "Honestly, what you have been doing is basically saying 'as a DMA maintainer I control what the DMA code is used for.' And that is not how any of this works," Torvalds writes.
> Torvalds writes Hellwig that "I respect you technically, and I like working with you," and that he likes when Hellwig "call[s] me out on my bullshit," as there "needs to be people who just stand up to me and tell me I'm full of shit." But, Torvalds writes, "Now I'm calling you out on YOURS."
> The leader goes on to state that maintainers who want to be involved in Rust can be, and can influence what Rust bindings look like. Those who "are taking the 'I don't want to deal with Rust' option," Torvalds writes, can do so—later describing it as a "wall of protection"—but also have no say on Rust code that builds on their C interfaces.
> "Put another way: the 'nobody is forced to deal with Rust' does not imply 'everybody is allowed to veto any Rust code.'" Maintainers might also find space in the middle, being aware of Rust bindings and working with Rust developers, but not actively involved, Torvalds writes.
> Maintainers like Hellwig who do not want to integrate Rust do not have to. But they also cannot dictate the language or manner of code that touches their area of control but does not alter it. The pull request Hellwig objected to "DID NOT TOUCH THE DMA LAYER AT ALL," Torvalds writes (all-caps emphasis his), and was "literally just another user of it, in a completely separate subdirectory."
> "Honestly, what you have been doing is basically saying 'as a DMA maintainer I control what the DMA code is used for.' And that is not how any of this works," Torvalds writes.
> Torvalds writes Hellwig that "I respect you technically, and I like working with you," and that he likes when Hellwig "call[s] me out on my bullshit," as there "needs to be people who just stand up to me and tell me I'm full of shit." But, Torvalds writes, "Now I'm calling you out on YOURS."
> The leader goes on to state that maintainers who want to be involved in Rust can be, and can influence what Rust bindings look like. Those who "are taking the 'I don't want to deal with Rust' option," Torvalds writes, can do so—later describing it as a "wall of protection"—but also have no say on Rust code that builds on their C interfaces.
> "Put another way: the 'nobody is forced to deal with Rust' does not imply 'everybody is allowed to veto any Rust code.'" Maintainers might also find space in the middle, being aware of Rust bindings and working with Rust developers, but not actively involved, Torvalds writes.
https://arstechnica.com/gadgets/2025/02/linux-leaders-pave-a...