reproduce (this is a W=1 build):
        # https://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux.git/commit/?id=fec1982d70721c0062758861fec7e4e9d1103fb6
        git remote add wsa https://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux.git
        git fetch --no-tags wsa i2c/for-next
        git checkout fec1982d70721c0062758861fec7e4e9d1103fb6
        # 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/power/supply/