tree: https://android.googlesource.com/kernel/common android-4.14-stable head: 08870bd1a24fc7f3ae4ff30bc7e64c09edd931d4 commit: 08870bd1a24fc7f3ae4ff30bc7e64c09edd931d4 [1/1] ANDROID: namespace'ify tcp_default_init_rwnd implementation config: x86_64-randconfig-a006-20200526 (attached as .config) compiler: clang version 11.0.0 (https://github.com/llvm/llvm-project 3393cc4cebf9969db94dc424b7a2b6195589c33b) 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 x86_64 cross compiling tool for clang build # apt-get install binutils-x86-64-linux-gnu git checkout 08870bd1a24fc7f3ae4ff30bc7e64c09edd931d4 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64 If you fix the issue, kindly add following tag as appropriate Reported-by: kbuild test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>, old ones prefixed by <<): Warning: objdump says 5 bytes, but insn_get_length() says 3 Warning: arch/x86/tools/test_get_len found difference at <memcpy_page_flushcache>:ffffffff82be6c20 -- Warning: objdump says 5 bytes, but insn_get_length() says 3 Warning: arch/x86/tools/test_get_len found difference at <memcpy_page_flushcache>:ffffffff82be6c20 -- Warning: objdump says 5 bytes, but insn_get_length() says 3 Warning: arch/x86/tools/test_get_len found difference at <memcpy_page_flushcache>:ffffffff82be6c20 -- Warning: objdump says 5 bytes, but insn_get_length() says 3 Warning: arch/x86/tools/test_get_len found difference at <memcpy_page_flushcache>:ffffffff82be6c20 -- Warning: objdump says 5 bytes, but insn_get_length() says 3 Warning: arch/x86/tools/test_get_len found difference at <memcpy_page_flushcache>:ffffffff82be6c20 -- Warning: objdump says 5 bytes, but insn_get_length() says 3 Warning: arch/x86/tools/test_get_len found difference at <memcpy_page_flushcache>:ffffffff82be6c20 -- Warning: objdump says 5 bytes, but insn_get_length() says 3 Warning: arch/x86/tools/test_get_len found difference at <memcpy_page_flushcache>:ffffffff82be6c20 -- Warning: objdump says 5 bytes, but insn_get_length() says 3 Warning: arch/x86/tools/test_get_len found difference at <memcpy_page_flushcache>:ffffffff82be6c20 -- Warning: objdump says 5 bytes, but insn_get_length() says 3 Warning: arch/x86/tools/test_get_len found difference at <memcpy_page_flushcache>:ffffffff82be6c20 -- Warning: objdump says 5 bytes, but insn_get_length() says 3 Warning: arch/x86/tools/test_get_len found difference at <memcpy_page_flushcache>:ffffffff82be6c20 -- Warning: objdump says 5 bytes, but insn_get_length() says 3 Warning: arch/x86/tools/test_get_len found difference at <memcpy_page_flushcache>:ffffffff82be6c20 .. --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org