reproduce (this is a W=1 build): git clone https://github.com/intel/lkp-tests.git ~/lkp-tests # https://git.kernel.org/pub/scm/linux/kernel/git/cip/linux-cip.git/commit/?id=4dfb37ff6229e10facb903c5aa2a1966b930facf git remote add cip https://git.kernel.org/pub/scm/linux/kernel/git/cip/linux-cip.git git fetch --no-tags cip linux-4.4.y-cip-rebase git checkout 4dfb37ff6229e10facb903c5aa2a1966b930facf # save the config file mkdir build_dir && cp config build_dir/.config COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-7.5.0 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=arm olddefconfig COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-7.5.0 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=arm SHELL=/bin/bash drivers/mfd/