tree: https://chromium.googlesource.com/chromiumos/third_party/kernel chromeos-4.4 head: 2c1ef593f46d417333817c90745e671197c06958 commit: 03b3e0a6e4cb138069de51cdd49d233f9da24159 [8/9] FROMLIST: lib/string.c: implement stpcpy config: x86_64-randconfig-a006-20200913 (attached as .config) compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project 3170d54842655d6d936aae32b7d0bc92fce7f22e) 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 03b3e0a6e4cb138069de51cdd49d233f9da24159 # 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: kernel test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>): In file included from include/linux/highmem.h:8: In file included from include/linux/uaccess.h:8: arch/x86/include/asm/uaccess.h:773:26: warning: comparison of integers of different signs: 'int' and 'unsigned long' [-Wsign-compare] if (likely(sz < 0 || sz >= n)) { ~~ ^ ~ include/linux/compiler.h:150:51: note: expanded from macro 'likely' # define likely(x) (__builtin_constant_p(x) ? !!(x) : __branch_check__(x, 1)) ^ include/linux/compiler.h:161:36: note: expanded from macro 'if' #define if(cond, ...) __trace_if( (cond , ## __VA_ARGS__) ) ^~~~ include/linux/compiler.h:174:16: note: expanded from macro '__trace_if' ______r = !!(cond); \ ^~~~ In file included from fs/ntfs/logfile.c:26: In file included from include/linux/highmem.h:8: In file included from include/linux/uaccess.h:8: arch/x86/include/asm/uaccess.h:773:26: warning: comparison of integers of different signs: 'int' and 'unsigned long' [-Wsign-compare] if (likely(sz < 0 || sz >= n)) { ~~ ^ ~ include/linux/compiler.h:150:43: note: expanded from macro 'likely' # define likely(x) (__builtin_constant_p(x) ? !!(x) : __branch_check__(x, 1)) ^ include/linux/compiler.h:161:36: note: expanded from macro 'if' #define if(cond, ...) __trace_if( (cond , ## __VA_ARGS__) ) ^~~~ include/linux/compiler.h:163:30: note: expanded from macro '__trace_if' if (__builtin_constant_p(!!(cond)) ? !!(cond) : \ ^~~~ In file included from fs/ntfs/logfile.c:26: In file included from include/linux/highmem.h:8: In file included from include/linux/uaccess.h:8: arch/x86/include/asm/uaccess.h:773:26: warning: comparison of integers of different signs: 'int' and 'unsigned long' [-Wsign-compare] if (likely(sz < 0 || sz >= n)) { ~~ ^ ~ include/linux/compiler.h:150:51: note: expanded from macro 'likely' # define likely(x) (__builtin_constant_p(x) ? !!(x) : __branch_check__(x, 1)) ^ include/linux/compiler.h:161:36: note: expanded from macro 'if' #define if(cond, ...) __trace_if( (cond , ## __VA_ARGS__) ) ^~~~ include/linux/compiler.h:163:30: note: expanded from macro '__trace_if' if (__builtin_constant_p(!!(cond)) ? !!(cond) : \ ^~~~ fs/ntfs/logfile.c:385:11: warning: comparison of integers of different signs: 'int' and '__u32' (aka 'unsigned int') [-Wsign-compare] if (size >= le32_to_cpu(rp->system_page_size)) { ~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/compiler.h:161:36: note: expanded from macro 'if' #define if(cond, ...) __trace_if( (cond , ## __VA_ARGS__) ) ~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~ include/linux/compiler.h:174:16: note: expanded from macro '__trace_if' ______r = !!(cond); \ ^~~~ fs/ntfs/logfile.c:385:11: warning: comparison of integers of different signs: 'int' and '__u32' (aka 'unsigned int') [-Wsign-compare] if (size >= le32_to_cpu(rp->system_page_size)) { ~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/compiler.h:161:36: note: expanded from macro 'if' #define if(cond, ...) __trace_if( (cond , ## __VA_ARGS__) ) ~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~ include/linux/compiler.h:163:30: note: expanded from macro '__trace_if' if (__builtin_constant_p(!!(cond)) ? !!(cond) : \ ^~~~ fs/ntfs/logfile.c:385:11: warning: comparison of integers of different signs: 'int' and '__u32' (aka 'unsigned int') [-Wsign-compare] if (size >= le32_to_cpu(rp->system_page_size)) { ~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/compiler.h:161:36: note: expanded from macro 'if' #define if(cond, ...) __trace_if( (cond , ## __VA_ARGS__) ) ~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~ include/linux/compiler.h:163:42: note: expanded from macro '__trace_if' if (__builtin_constant_p(!!(cond)) ? !!(cond) : \ ^~~~ fs/ntfs/logfile.c:504:11: warning: comparison of integers of different signs: 's64' (aka 'long long') and 'unsigned long long' [-Wsign-compare] if (size > MaxLogFileSize) ~~~~ ^ ~~~~~~~~~~~~~~ include/linux/compiler.h:161:36: note: expanded from macro 'if' #define if(cond, ...) __trace_if( (cond , ## __VA_ARGS__) ) ^~~~ include/linux/compiler.h:174:16: note: expanded from macro '__trace_if' ______r = !!(cond); \ ^~~~ fs/ntfs/logfile.c:504:11: warning: comparison of integers of different signs: 's64' (aka 'long long') and 'unsigned long long' [-Wsign-compare] if (size > MaxLogFileSize) ~~~~ ^ ~~~~~~~~~~~~~~ include/linux/compiler.h:161:36: note: expanded from macro 'if' #define if(cond, ...) __trace_if( (cond , ## __VA_ARGS__) ) ^~~~ include/linux/compiler.h:163:30: note: expanded from macro '__trace_if' if (__builtin_constant_p(!!(cond)) ? !!(cond) : \ ^~~~ fs/ntfs/logfile.c:504:11: warning: comparison of integers of different signs: 's64' (aka 'long long') and 'unsigned long long' [-Wsign-compare] if (size > MaxLogFileSize) ~~~~ ^ ~~~~~~~~~~~~~~ include/linux/compiler.h:161:36: note: expanded from macro 'if' #define if(cond, ...) __trace_if( (cond , ## __VA_ARGS__) ) ^~~~ include/linux/compiler.h:163:42: note: expanded from macro '__trace_if' if (__builtin_constant_p(!!(cond)) ? !!(cond) : \ ^~~~ 22 warnings generated. /tmp/logfile-611928.s: Assembler messages: --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org