Linus Torvalds used Claude again to remove years-old, slow and insecure Linux kernel code. The cleanup is now merged into Linux 7.4 and spans 48 commits. It targets __get_user() and __put_user(), old memory-access helpers that skip user-address checks. Linus says their historical performance advantage disappeared years ago. He wrote the initial example patch, then used Claude to help apply the same changes elsewhere. The old calls are gone from generic kernel code, with the interfaces fully removed on x86. Other architectures still retain some uses. As Linus put it, “we should have done this years ago.” Source: github.com/torvalds/linux/co…