Hi Paul, [auto build test ERROR on ljones-mfd/for-mfd-next] [also build test ERROR on v4.12-rc3 next-20170602] [if your patch is applied to the wrong git tree, please drop us a note to help improve the system] url: https://github.com/0day-ci/linux/commits/Paul-Gortmaker/mfd-make-da90xx-drivers-explicitly-non-modular/20170603-211054 base: https://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd.git for-mfd-next config: s390-allmodconfig (attached as .config) compiler: s390x-linux-gnu-gcc (Debian 6.1.1-9) 6.1.1 20160705 reproduce: wget https://raw.githubusercontent.com/01org/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # save the attached .config to linux build tree make.cross ARCH=s390 Note: the linux-review/Paul-Gortmaker/mfd-make-da90xx-drivers-explicitly-non-modular/20170603-211054 HEAD c8ab14d7a1d96ff8fb5121c974030c48824d0914 builds fine. It only hurts bisectibility. All errors (new ones prefixed by >>): drivers/built-in.o: In function `da9055_i2c_remove': >> drivers/mfd/.tmp_gl_da9055-i2c.o:(.text+0x17860e): undefined reference to `da9055_device_exit' --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation