reproduce (this is a W=1 build): # https://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux.git/commit/?id=f3f653854e47ac9e3d8dfda95636f80d2bf3d5fd git remote add wsa https://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux.git git fetch --no-tags wsa renesas/genmai-upstreaming git checkout f3f653854e47ac9e3d8dfda95636f80d2bf3d5fd # save the config file mkdir build_dir && cp config build_dir/.config make W=1 O=build_dir ARCH=i386 olddefconfig make W=1 O=build_dir ARCH=i386 SHELL=/bin/bash drivers/mmc/host/