reproduce (this is a W=1 build):
        # https://git.kernel.org/pub/scm/linux/kernel/git/hare/nvme.git/commit/?id=c15b65f0fa820eb76beeeaed71d861d29b5d7af2
        git remote add hare-nvme https://git.kernel.org/pub/scm/linux/kernel/git/hare/nvme.git
        git fetch --no-tags hare-nvme nvme-fpin.v3
        git checkout c15b65f0fa820eb76beeeaed71d861d29b5d7af2
        # 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/nvme/target/