tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master head: e7b08814b16b80a0bf76eeca16317f8c2ed23b8c commit: ca07eda33e01eafa7a26ec06974f7eacee6a89c8 [10476/14131] SUNRPC: Refactor svc_recvfrom() config: i386-randconfig-a013-20200601 (attached as .config) compiler: clang version 11.0.0 (https://github.com/llvm/llvm-project 2388a096e7865c043e83ece4e26654bd3d1a20d5) 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 i386 cross compiling tool for clang build # apt-get install binutils-i386-linux-gnu git checkout ca07eda33e01eafa7a26ec06974f7eacee6a89c8 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=i386 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 <<): clang-11: warning: optimization flag '-falign-jumps=0' is not supported [-Wignored-optimization-argument] clang-11: warning: optimization flag '-falign-loops=0' is not supported [-Wignored-optimization-argument] In file included from net/sunrpc/svcsock.c:24: In file included from include/linux/sched.h:14: In file included from include/linux/pid.h:5: In file included from include/linux/rculist.h:11: In file included from include/linux/rcupdate.h:27: In file included from include/linux/preempt.h:78: In file included from arch/x86/include/asm/preempt.h:7: In file included from include/linux/thread_info.h:38: arch/x86/include/asm/thread_info.h:190:13: warning: calling '__builtin_frame_address' with a nonzero argument is unsafe [-Wframe-address] oldframe = __builtin_frame_address(1); ^~~~~~~~~~~~~~~~~~~~~~~~~~ arch/x86/include/asm/thread_info.h:192:11: warning: calling '__builtin_frame_address' with a nonzero argument is unsafe [-Wframe-address] frame = __builtin_frame_address(2); ^~~~~~~~~~~~~~~~~~~~~~~~~~ #if ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE ^ 3 warnings generated. vim +/ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE +226 net/sunrpc/svcsock.c 225 227 static void svc_flush_bvec(const struct bio_vec *bvec, size_t size, size_t seek) 228 { 229 struct bvec_iter bi = { 230 .bi_size = size, 231 }; 232 struct bio_vec bv; 233 234 bvec_iter_advance(bvec, &bi, seek & PAGE_MASK); 235 for_each_bvec(bv, bvec, bi, bi) 236 flush_dcache_page(bv.bv_page); 237 } 238 #else 239 static inline void svc_flush_bvec(const struct bio_vec *bvec, size_t size, 240 size_t seek) 241 { 242 } 243 #endif 244 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org