[kbuild-all] [oracle-dtrace-linux-kernel:v1/5.9 3/22] <stdin>:1526:2: warning: syscall waitfd not implemented

tree: https://github.com/oracle/dtrace-linux-kernel v1/5.9 head: c731ef8ca2d64eacba761c43f05a59bc6054ad6a commit: 9b4fcbb25da4d7540c90c6fb68013dbf535703a3 [3/22] waitfd: new syscall implementing waitpid() over fds config: arm-randconfig-r021-20201012 (attached as .config) compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project 9e72d3eaf38f217698f72cb8fdc969a6e72dad3a) 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 # install arm cross compiling tool for clang build # apt-get install binutils-arm-linux-gnueabi # https://github.com/oracle/dtrace-linux-kernel/commit/9b4fcbb25da4d7540c90... git remote add oracle-dtrace-linux-kernel https://github.com/oracle/dtrace-linux-kernel git fetch --no-tags oracle-dtrace-linux-kernel v1/5.9 git checkout 9b4fcbb25da4d7540c90c6fb68013dbf535703a3 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=arm 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 >>): #warning syscall waitfd not implemented ^ 1 warning generated. -- #warning syscall waitfd not implemented ^ 1 warning generated. -- #warning syscall waitfd not implemented ^ 1 warning generated. --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org