reproduce (this is a W=1 build):
        # https://git.kernel.org/pub/scm/linux/kernel/git/mkp/scsi.git/commit/?id=a2ad002485c492354d572d743f60af0057ebe04e
        git remote add mkp-scsi https://git.kernel.org/pub/scm/linux/kernel/git/mkp/scsi.git
        git fetch --no-tags mkp-scsi for-next
        git checkout a2ad002485c492354d572d743f60af0057ebe04e
        # 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/usb/storage/