[$] An API for handling arithmetic overflow

On March 31, Kees Cook shareda patch set that represents the culmination of more than a year of worktoward eliminating the possibility of silent, unintentional integer overflow inthe kernel. Linus Torvalds wasnot pleased with the approach, leading to a detailed discussion about themeaning of "safe" integer operations and the design of APIs for handling integeroverflows. Eventually, the developers involved reached a consensus for adifferent API that should make handling overflow errors in the kernel much lessof a hassle.