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Fri, 22 Apr 2022 18:16:57 +0000 Date: Sat, 23 Apr 2022 02:16:07 +0800 From: kernel test robot To: Matteo Croce Cc: llvm@lists.linux.dev, kbuild-all@lists.01.org, linux-kernel@vger.kernel.org, Emil Renner Berthing Subject: [esmil:visionfive 2/54] mm/kasan/shadow.c:63:7: warning: no previous prototype for function 'memcpy' Message-ID: <202204230235.huNNhtoX-lkp@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org tree: https://github.com/esmil/linux visionfive head: 68fe13e37af4c8331cdd40841353c9725cb65925 commit: 359a031f0505e46e0274570b6e015984f45da29b [2/54] riscv: optimized memcpy config: riscv-randconfig-c006-20220422 (https://download.01.org/0day-ci/archive/20220423/202204230235.huNNhtoX-lkp@intel.com/config) compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project 5bd87350a5ae429baf8f373cb226a57b62f87280) 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 riscv cross compiling tool for clang build # apt-get install binutils-riscv64-linux-gnu # https://github.com/esmil/linux/commit/359a031f0505e46e0274570b6e015984f45da29b git remote add esmil https://github.com/esmil/linux git fetch --no-tags esmil visionfive git checkout 359a031f0505e46e0274570b6e015984f45da29b # save the config file mkdir build_dir && cp config build_dir/.config COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=riscv SHELL=/bin/bash mm/kasan/ If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot All warnings (new ones prefixed by >>): >> mm/kasan/shadow.c:63:7: warning: no previous prototype for function 'memcpy' [-Wmissing-prototypes] void *memcpy(void *dest, const void *src, size_t len) ^ mm/kasan/shadow.c:63:1: note: declare 'static' if the function is not intended to be used outside of this translation unit void *memcpy(void *dest, const void *src, size_t len) ^ static 1 warning generated. vim +/memcpy +63 mm/kasan/shadow.c bb359dbcb70085 Andrey Konovalov 2020-12-22 61 bb359dbcb70085 Andrey Konovalov 2020-12-22 62 #undef memcpy bb359dbcb70085 Andrey Konovalov 2020-12-22 @63 void *memcpy(void *dest, const void *src, size_t len) bb359dbcb70085 Andrey Konovalov 2020-12-22 64 { f00748bfa0246c Andrey Konovalov 2021-02-24 65 if (!kasan_check_range((unsigned long)src, len, false, _RET_IP_) || f00748bfa0246c Andrey Konovalov 2021-02-24 66 !kasan_check_range((unsigned long)dest, len, true, _RET_IP_)) bb359dbcb70085 Andrey Konovalov 2020-12-22 67 return NULL; bb359dbcb70085 Andrey Konovalov 2020-12-22 68 bb359dbcb70085 Andrey Konovalov 2020-12-22 69 return __memcpy(dest, src, len); bb359dbcb70085 Andrey Konovalov 2020-12-22 70 } bb359dbcb70085 Andrey Konovalov 2020-12-22 71 :::::: The code at line 63 was first introduced by commit :::::: bb359dbcb70085a63e8bdbf14837a900750f0cf7 kasan: split out shadow.c from common.c :::::: TO: Andrey Konovalov :::::: CC: Linus Torvalds -- 0-DAY CI Kernel Test Service https://01.org/lkp