reproduce (this is a W=1 build):
        git remote add hch-misc git://git.infradead.org/users/hch/misc.git
        git fetch --no-tags hch-misc pci-dma-mapping.h
        git checkout c195cf19ee228a0e49465bc91e2d3700b6bce5d1
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        make W=1 O=build_dir ARCH=x86_64 olddefconfig
        make W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash drivers/crypto/intel/qat/qat_4xxx/ drivers/dma/idxd/