tree: https://github.com/oracle/dtrace-linux-kernel v1/5.15 head: 0fee66d7ce96317146609675767971d0f35c3e74 commit: 0fd5e3924d69c1dc81e7c875fc9889b52c50248e [16/35] waitfd: new syscall implementing waitpid() over fds config: ia64-defconfig (attached as .config) compiler: ia64-linux-gcc (GCC) 11.2.0 reproduce (this is a W=1 build): wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # https://github.com/oracle/dtrace-linux-kernel/commit/0fd5e3924d69c1dc81e7... git remote add oracle-dtrace https://github.com/oracle/dtrace-linux-kernel git fetch --no-tags oracle-dtrace v1/5.15 git checkout 0fd5e3924d69c1dc81e7c875fc9889b52c50248e # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross ARCH=ia64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>): <stdin>:1517:2: warning: #warning syscall clone3 not implemented [-Wcpp] -- <stdin>:1517:2: warning: #warning syscall clone3 not implemented [-Wcpp] -- arch/ia64/kernel/asm-offsets.c:23:6: warning: no previous prototype for 'foo' [-Wmissing-prototypes] 23 | void foo(void) | ^~~ <stdin>:1517:2: warning: #warning syscall clone3 not implemented [-Wcpp] --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org