Hi Josh, kernel test robot noticed the following build warnings: [auto build test WARNING on linus/master] [also build test WARNING on v6.3-rc5] [cannot apply to akpm-mm/mm-everything next-20230404] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch#_base_tree_information] url: https://github.com/intel-lab-lkp/linux/commits/Josh-Triplett/prctl-Add-PR_GET_AUXV-to-copy-auxv-to-userspace/20230404-140043 patch link: https://lore.kernel.org/r/b11a591e085f1cd06adb454b1f7cde676d317318.1680585798.git.josh%40joshtriplett.org patch subject: [PATCH] prctl: Add PR_GET_AUXV to copy auxv to userspace config: arm-randconfig-r025-20230403 (https://download.01.org/0day-ci/archive/20230404/202304041710.JYcSAmPL-lkp@xxxxxxxxx/config) compiler: clang version 17.0.0 (https://github.com/llvm/llvm-project 67409911353323ca5edf2049ef0df54132fa1ca7) 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://github.com/intel-lab-lkp/linux/commit/4323f9bd6c2ecbfd6be4f8a3830ea47a89558314 git remote add linux-review https://github.com/intel-lab-lkp/linux git fetch --no-tags linux-review Josh-Triplett/prctl-Add-PR_GET_AUXV-to-copy-auxv-to-userspace/20230404-140043 git checkout 4323f9bd6c2ecbfd6be4f8a3830ea47a89558314 # save the config file mkdir build_dir && cp config build_dir/.config COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=arm olddefconfig COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=arm SHELL=/bin/bash If you fix the issue, kindly add following tag where applicable | Reported-by: kernel test robot <lkp@xxxxxxxxx> | Link: https://lore.kernel.org/oe-kbuild-all/202304041710.JYcSAmPL-lkp@xxxxxxxxx/ All warnings (new ones prefixed by >>): >> kernel/sys.c:2383:23: warning: comparison of distinct pointer types ('typeof (sizeof (mm->saved_auxv)) *' (aka 'unsigned int *') and 'typeof (len) *' (aka 'unsigned long *')) [-Wcompare-distinct-pointer-types] unsigned long size = min(sizeof(mm->saved_auxv), len); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/minmax.h:67:19: note: expanded from macro 'min' #define min(x, y) __careful_cmp(x, y, <) ^~~~~~~~~~~~~~~~~~~~~~ include/linux/minmax.h:36:24: note: expanded from macro '__careful_cmp' __builtin_choose_expr(__safe_cmp(x, y), \ ^~~~~~~~~~~~~~~~ include/linux/minmax.h:26:4: note: expanded from macro '__safe_cmp' (__typecheck(x, y) && __no_side_effects(x, y)) ^~~~~~~~~~~~~~~~~ include/linux/minmax.h:20:28: note: expanded from macro '__typecheck' (!!(sizeof((typeof(x) *)1 == (typeof(y) *)1))) ~~~~~~~~~~~~~~ ^ ~~~~~~~~~~~~~~ 1 warning generated. vim +2383 kernel/sys.c 2379 2380 static int prctl_get_auxv(void __user *addr, unsigned long len) 2381 { 2382 struct mm_struct *mm = current->mm; > 2383 unsigned long size = min(sizeof(mm->saved_auxv), len); 2384 2385 if (size && copy_to_user(addr, mm->saved_auxv, size)) 2386 return -EFAULT; 2387 return sizeof(mm->saved_auxv); 2388 } 2389 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests
