tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master head: 75d7bf5eae277f32dd952276aa41ae7915dba1b2 commit: 0c9b9c2ac0df57b6b5949a51c45043b345698428 [4986/8513] mfd: core: Use acpi_dev_for_each_child() config: x86_64-defconfig (https://download.01.org/0day-ci/archive/20220707/202207072255.cgvU8ZuO-lkp@xxxxxxxxx/config) compiler: gcc-11 (Debian 11.3.0-3) 11.3.0 reproduce (this is a W=1 build): # https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=0c9b9c2ac0df57b6b5949a51c45043b345698428 git remote add linux-next https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git git fetch --no-tags linux-next master git checkout 0c9b9c2ac0df57b6b5949a51c45043b345698428 # save the config file mkdir build_dir && cp config build_dir/.config make W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash If you fix the issue, kindly add following tag where applicable Reported-by: kernel test robot <lkp@xxxxxxxxx> Note: the linux-next/master HEAD 75d7bf5eae277f32dd952276aa41ae7915dba1b2 builds fine. It may have been fixed somewhere. All errors (new ones prefixed by >>, old ones prefixed by <<): >> ERROR: modpost: "acpi_dev_for_each_child" [drivers/mfd/mfd-core.ko] undefined! -- 0-DAY CI Kernel Test Service https://01.org/lkp
