reproduce (this is a W=1 build):
        git checkout b84a0ebe421ca56995ff78b66307667b62b3a900
        b4 shazam https://lore.kernel.org/r/20260403-cpuidle_ipi-v2-1-b3e44b032e2c@oss.qualcomm.com

        # 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