tree: https://git.kernel.org/pub/scm/linux/kernel/git/kees/linux.git kspp/memcpy/next-20210618/v0 head: fd2aa2a169de8bde9502e7a2fc48cd03d4bfd996 commit: 6d805912063804ea975440760b79392fc0c03948 [81/82] fortify: Work around Clang inlining bugs config: arm-randconfig-r024-20210618 (attached as .config) compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project d1baf2895467735ab14f4b3415fce204c0cc8e7f) 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://git.kernel.org/pub/scm/linux/kernel/git/kees/linux.git/commit/?id... git remote add kees https://git.kernel.org/pub/scm/linux/kernel/git/kees/linux.git git fetch --no-tags kees kspp/memcpy/next-20210618/v0 git checkout 6d805912063804ea975440760b79392fc0c03948 # 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 error/warnings (new ones prefixed by >>): void *memcpy(void *__dest, __const void *__src, size_t __n) ^ include/linux/fortify-string.h:304:32: note: expanded from macro 'memcpy' __builtin_object_size(p, 1), \ ^ include/linux/fortify-string.h:304:32: note: expanded from macro 'memcpy' __builtin_object_size(p, 1), \ ^ arch/arm/boot/compressed/string.c:29:7: note: to match this '(' include/linux/fortify-string.h:304:28: note: expanded from macro 'memcpy' __builtin_object_size(p, 1), \ ^ void *memcpy(void *__dest, __const void *__src, size_t __n) ^ include/linux/fortify-string.h:304:7: note: expanded from macro 'memcpy' __builtin_object_size(p, 1), \ ^ include/linux/fortify-string.h:305:32: note: expanded from macro 'memcpy' __builtin_object_size(q, 1)) ^ include/linux/fortify-string.h:305:32: note: expanded from macro 'memcpy' __builtin_object_size(q, 1)) ^ arch/arm/boot/compressed/string.c:29:7: note: to match this '(' include/linux/fortify-string.h:305:28: note: expanded from macro 'memcpy' __builtin_object_size(q, 1)) ^ void *memcpy(void *__dest, __const void *__src, size_t __n) ^ include/linux/fortify-string.h:305:7: note: expanded from macro 'memcpy' __builtin_object_size(q, 1)) ^ include/linux/fortify-string.h:305:7: note: expanded from macro 'memcpy' __builtin_object_size(q, 1)) ^ arch/arm/boot/compressed/string.c:29:7: note: previous declaration is here include/linux/fortify-string.h:304:7: note: expanded from macro 'memcpy' __builtin_object_size(p, 1), \ ^ void *memcpy(void *__dest, __const void *__src, size_t __n) ^ include/linux/fortify-string.h:305:7: note: expanded from macro 'memcpy' __builtin_object_size(q, 1)) ^ arch/arm/boot/compressed/string.c:63:7: error: expected parameter declarator void *memmove(void *__dest, __const void *__src, size_t count) ^ include/linux/fortify-string.h:316:34: note: expanded from macro 'memmove' __builtin_object_size(p, 1), \ ^ arch/arm/boot/compressed/string.c:63:7: error: expected ')' include/linux/fortify-string.h:316:34: note: expanded from macro 'memmove' __builtin_object_size(p, 1), \ ^ arch/arm/boot/compressed/string.c:63:7: note: to match this '(' include/linux/fortify-string.h:316:30: note: expanded from macro 'memmove' __builtin_object_size(p, 1), \ ^ arch/arm/boot/compressed/string.c:63:7: warning: declaration specifier missing, defaulting to 'int' void *memmove(void *__dest, __const void *__src, size_t count) ^ include/linux/fortify-string.h:316:9: note: expanded from macro 'memmove' __builtin_object_size(p, 1), \ ^ arch/arm/boot/compressed/string.c:63:7: error: expected parameter declarator include/linux/fortify-string.h:317:34: note: expanded from macro 'memmove' __builtin_object_size(q, 1)) ^ arch/arm/boot/compressed/string.c:63:7: error: expected ')' include/linux/fortify-string.h:317:34: note: expanded from macro 'memmove' __builtin_object_size(q, 1)) ^ arch/arm/boot/compressed/string.c:63:7: note: to match this '(' include/linux/fortify-string.h:317:30: note: expanded from macro 'memmove' __builtin_object_size(q, 1)) ^ arch/arm/boot/compressed/string.c:63:7: warning: declaration specifier missing, defaulting to 'int' void *memmove(void *__dest, __const void *__src, size_t count) ^ include/linux/fortify-string.h:317:9: note: expanded from macro 'memmove' __builtin_object_size(q, 1)) ^ arch/arm/boot/compressed/string.c:63:7: error: redefinition of parameter '__builtin_object_size' include/linux/fortify-string.h:317:9: note: expanded from macro 'memmove' __builtin_object_size(q, 1)) ^ arch/arm/boot/compressed/string.c:63:7: note: previous declaration is here include/linux/fortify-string.h:316:9: note: expanded from macro 'memmove' __builtin_object_size(p, 1), \ ^ arch/arm/boot/compressed/string.c:63:7: warning: omitting the parameter name in a function definition is a C2x extension [-Wc2x-extensions] void *memmove(void *__dest, __const void *__src, size_t count) ^ include/linux/fortify-string.h:317:9: note: expanded from macro 'memmove' __builtin_object_size(q, 1)) ^ return memcpy(__dest, __src, count); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/fortify-string.h:304:32: note: expanded from macro 'memcpy' __builtin_object_size(p, 1), \ ~~~~~~~~~~~~~~~~~~~~~ ^ return memcpy(__dest, __src, count); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/fortify-string.h:305:32: note: expanded from macro 'memcpy' __builtin_object_size(q, 1)) ~~~~~~~~~~~~~~~~~~~~~ ^ 6 warnings and 12 errors generated. vim +/__builtin_object_size +29 arch/arm/boot/compressed/string.c d6d51a96c7d63b Linus Walleij 2020-10-25 28 df4879fa2603fb Nicolas Pitre 2011-09-13 @29 void *memcpy(void *__dest, __const void *__src, size_t __n) df4879fa2603fb Nicolas Pitre 2011-09-13 30 { df4879fa2603fb Nicolas Pitre 2011-09-13 31 int i = 0; df4879fa2603fb Nicolas Pitre 2011-09-13 32 unsigned char *d = (unsigned char *)__dest, *s = (unsigned char *)__src; df4879fa2603fb Nicolas Pitre 2011-09-13 33 df4879fa2603fb Nicolas Pitre 2011-09-13 34 for (i = __n >> 3; i > 0; i--) { df4879fa2603fb Nicolas Pitre 2011-09-13 35 *d++ = *s++; df4879fa2603fb Nicolas Pitre 2011-09-13 36 *d++ = *s++; df4879fa2603fb Nicolas Pitre 2011-09-13 37 *d++ = *s++; df4879fa2603fb Nicolas Pitre 2011-09-13 38 *d++ = *s++; df4879fa2603fb Nicolas Pitre 2011-09-13 39 *d++ = *s++; df4879fa2603fb Nicolas Pitre 2011-09-13 40 *d++ = *s++; df4879fa2603fb Nicolas Pitre 2011-09-13 41 *d++ = *s++; df4879fa2603fb Nicolas Pitre 2011-09-13 42 *d++ = *s++; df4879fa2603fb Nicolas Pitre 2011-09-13 43 } df4879fa2603fb Nicolas Pitre 2011-09-13 44 df4879fa2603fb Nicolas Pitre 2011-09-13 45 if (__n & 1 << 2) { df4879fa2603fb Nicolas Pitre 2011-09-13 46 *d++ = *s++; df4879fa2603fb Nicolas Pitre 2011-09-13 47 *d++ = *s++; df4879fa2603fb Nicolas Pitre 2011-09-13 48 *d++ = *s++; df4879fa2603fb Nicolas Pitre 2011-09-13 49 *d++ = *s++; df4879fa2603fb Nicolas Pitre 2011-09-13 50 } df4879fa2603fb Nicolas Pitre 2011-09-13 51 df4879fa2603fb Nicolas Pitre 2011-09-13 52 if (__n & 1 << 1) { df4879fa2603fb Nicolas Pitre 2011-09-13 53 *d++ = *s++; df4879fa2603fb Nicolas Pitre 2011-09-13 54 *d++ = *s++; df4879fa2603fb Nicolas Pitre 2011-09-13 55 } df4879fa2603fb Nicolas Pitre 2011-09-13 56 df4879fa2603fb Nicolas Pitre 2011-09-13 57 if (__n & 1) df4879fa2603fb Nicolas Pitre 2011-09-13 58 *d++ = *s++; df4879fa2603fb Nicolas Pitre 2011-09-13 59 df4879fa2603fb Nicolas Pitre 2011-09-13 60 return __dest; df4879fa2603fb Nicolas Pitre 2011-09-13 61 } df4879fa2603fb Nicolas Pitre 2011-09-13 62 df4879fa2603fb Nicolas Pitre 2011-09-13 63 void *memmove(void *__dest, __const void *__src, size_t count) df4879fa2603fb Nicolas Pitre 2011-09-13 64 { df4879fa2603fb Nicolas Pitre 2011-09-13 65 unsigned char *d = __dest; df4879fa2603fb Nicolas Pitre 2011-09-13 66 const unsigned char *s = __src; df4879fa2603fb Nicolas Pitre 2011-09-13 67 df4879fa2603fb Nicolas Pitre 2011-09-13 68 if (__dest == __src) df4879fa2603fb Nicolas Pitre 2011-09-13 69 return __dest; df4879fa2603fb Nicolas Pitre 2011-09-13 70 df4879fa2603fb Nicolas Pitre 2011-09-13 71 if (__dest < __src) df4879fa2603fb Nicolas Pitre 2011-09-13 @72 return memcpy(__dest, __src, count); df4879fa2603fb Nicolas Pitre 2011-09-13 73 df4879fa2603fb Nicolas Pitre 2011-09-13 74 while (count--) df4879fa2603fb Nicolas Pitre 2011-09-13 75 d[count] = s[count]; df4879fa2603fb Nicolas Pitre 2011-09-13 76 return __dest; df4879fa2603fb Nicolas Pitre 2011-09-13 77 } df4879fa2603fb Nicolas Pitre 2011-09-13 78 :::::: The code at line 29 was first introduced by commit :::::: df4879fa2603fbf0804a80f9f146ef9023dd621f ARM: zImage: gather some string functions into string.c :::::: TO: Nicolas Pitre <nicolas.pitre(a)linaro.org&gt; :::::: CC: Nicolas Pitre <nico(a)fluxnic.net&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org