reproduce (this is a W=1 build):
        git clone https://github.com/intel/lkp-tests.git ~/lkp-tests
        # install arm cross compiling tool for clang build
        # apt-get install binutils-arm-linux-gnueabi
        # https://github.com/jonmason/ntb/commit/1361021161161af720f27081dc7cbda6e3c6f6d0
        git remote add jonmason-ntb https://github.com/jonmason/ntb
        git fetch --no-tags jonmason-ntb ntb-perf-latency
        git checkout 1361021161161af720f27081dc7cbda6e3c6f6d0
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang-17 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=arm olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang-17 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=arm SHELL=/bin/bash drivers/ntb/test/