reproduce (this is a W=1 build):
        git remote add samba-ksmbd git://git.samba.org/ksmbd.git
        git fetch --no-tags samba-ksmbd for-next
        git checkout 8c24bfe7980824c3a1f4f5bf598a4b307f22084d

        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=$HOME/0day COMPILER=gcc-15.2.0 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=m68k olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-15.2.0 ~/lkp-tests/kbuild/make.cross W=1 O=build_dir ARCH=m68k SHELL=/bin/bash fs/smb/client/