reproduce (this is a W=1 build):
        # https://git.kernel.org/pub/scm/linux/kernel/git/ath/ath.git/commit/?id=f6a46bc3719cc6b445cb071a7dd6968891ffb169
        git remote add ath https://git.kernel.org/pub/scm/linux/kernel/git/ath/ath.git
        git fetch --no-tags ath pending
        git checkout f6a46bc3719cc6b445cb071a7dd6968891ffb169
        # 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/net/wireless/ath/ath12k/