Hi Dmitry, [auto build test ERROR on v4.8-rc3] [also build test ERROR on next-20160825] [cannot apply to tip/x86/core tip/x86/vdso linux/master] [if your patch is applied to the wrong git tree, please drop us a note to help improve the system] [Suggest to use git(>=2.9.0) format-patch --base= (or --base=auto for convenience) to record what (public, well-known) commit your patch series was built on] [Check https://git-scm.com/docs/git-format-patch for more information] url: https://github.com/0day-ci/linux/commits/Dmitry-Safonov/x86-32-bit-compatible-C-R-on-x86_64/20160827-011727 config: x86_64-randconfig-v0-08280034 (attached as .config) compiler: gcc-6 (Debian 6.1.1-9) 6.1.1 20160705 reproduce: # save the attached .config to linux build tree make ARCH=x86_64 All errors (new ones prefixed by >>): arch/x86/built-in.o: In function `do_arch_prctl': >> (.text+0x29865): undefined reference to `vdso_image_32' arch/x86/built-in.o: In function `do_arch_prctl': (.text+0x29877): undefined reference to `vdso_image_32' --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation