reproduce:
        # https://git.kernel.org/pub/scm/linux/kernel/git/arnd/playground.git/commit/?id=995c76328bc34941c467895b511c0f7d16bfa06a
        git remote add arnd-playground https://git.kernel.org/pub/scm/linux/kernel/git/arnd/playground.git
        git fetch --no-tags arnd-playground config-gpio-legacy
        git checkout 995c76328bc34941c467895b511c0f7d16bfa06a
        # choose either of the following two methods to reproduce the issue
        # 1. reproduce by kismet
           # install kmax per https://github.com/paulgazz/kmax/blob/master/README.md
           kismet --linux-ksrc=linux --selectees CONFIG_GPIOLIB_LEGACY --selectors CONFIG_INPUT_SOC_BUTTON_ARRAY -a=i386
        # 2. reproduce by make
           cd linux
           # download the config file from the "config:" link in the report, and save it as .config
           make ARCH=i386 olddefconfig