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
        git remote add bluetooth-next https://git.kernel.org/pub/scm/linux/kernel/git/bluetooth/bluetooth-next.git
        git fetch bluetooth-next master
        git checkout bluetooth-next/master
        b4 shazam https://lore.kernel.org/r/20241002141217.663070-1-andrew.shadura@collabora.co.uk
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang-20 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=arm olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang-20 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=arm SHELL=/bin/bash arch/arm/kernel/ block/ drivers/android/ drivers/base/ drivers/block/ drivers/clk/ drivers/devfreq/ drivers/dma-buf/ drivers/firmware/arm_scmi/ drivers/fsi/ drivers/gpio/ drivers/greybus/ drivers/hwmon/ drivers/i2c/ drivers/iio/ drivers/interconnect/ drivers/iommu/ drivers/mmc/core/ drivers/nvme/target/ drivers/platform/chrome/ drivers/pwm/ drivers/ras/ drivers/regulator/ drivers/rtc/ drivers/scsi/ drivers/siox/ drivers/soc/qcom/ drivers/spmi/ drivers/tee/optee/ drivers/thermal/ drivers/thunderbolt/ drivers/tty/ drivers/ufs/core/ drivers/watchdog/ fs/ init/ io_uring/ kernel/ lib/ mm/ net/