Linus Torvalds removes the unsafe __get_user() and __put_user() functions from the Linux kernel, assisted by Claude Code

On October 21, 2026, Linus Torvalds merged into Linux 7.4 the removal of __get_user() and __put_user(), historical variants that do not validate the user address range and are therefore unsafe. He drafted the conversion partly with Claude Code, used “as a fancy sort of Coccinelle script”: AI is settling into kernel maintenance, including for eliminating whole classes of memory bugs.