[$] The end of __get_user() and __put_user()

Linus Torvalds rarely writes significant amounts of kernel code these days, sothe mergingof a 48-part patch series from him is an unusual event. This series,destined for the 7.4 kernel release, performs some long-delayed kernelcleanup by removing a couple of the primitives used to access user-space memoryfrom the kernel. What was once a best practice has long been superseded,but it can take time for such changes to work their way through a body ofcode this large.