reproduce (this is a W=1 build):
        # https://github.com/scosu/linux-sched/commit/7843b89341e2ef350c85f26da6cc575799b103bd
        git remote add scosu-sched https://github.com/scosu/linux-sched
        git fetch --no-tags scosu-sched topic/mmap-cap-prot-wip/v6.18
        git checkout 7843b89341e2ef350c85f26da6cc575799b103bd

        git clone https://github.com/intel/lkp-tests.git ~/lkp-tests

        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-15.2.0 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=sh olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-15.2.0 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=sh SHELL=/bin/bash drivers/hid/ drivers/media/v4l2-core/ drivers/net/netdevsim/ fs/ ipc/ kernel/bpf/ kernel/trace/ lib/zstd/ mm/ net/bpf/ net/core/ net/mptcp/ net/netfilter/ net/nfc/nci/ net/sched/