Sascha, AFAIK he implemented two patches from Torvald's linux kernel git tree: * af958a38a60c7ca3d8a39c918c1baa2ff7b6b233 removes a broken check-for-integer-overflow method * 72cf90124e87d975d0b2114d930808c58b4c05e4 add's a new make-sure-integers-dont-overflow logic, which is also marked as "put it into stable kernels"