Hi Kent, kernel test robot noticed the following build warnings: [auto build test WARNING on tip/locking/core] [cannot apply to axboe-block/for-next akpm-mm/mm-everything kdave/for-next linus/master v6.4-rc1 next-20230509] [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/Kent-Overstreet/Compiler-Attributes-add-__flatten/20230510-010302 base: tip/locking/core patch link: https://lore.kernel.org/r/20230509165657.1735798-24-kent.overstreet%40linux.dev patch subject: [PATCH 23/32] iov_iter: copy_folio_from_iter_atomic() config: i386-randconfig-a002 (https://download.01.org/0day-ci/archive/20230510/202305101003.uncpRKqA-lkp@xxxxxxxxx/config) compiler: clang version 14.0.6 (https://github.com/llvm/llvm-project f28c006a5895fc0e329fe15fead81e37457cb1d1) 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 # https://github.com/intel-lab-lkp/linux/commit/0e5d4229f5e7671dabba56ea36583b1ca20a9a18 git remote add linux-review https://github.com/intel-lab-lkp/linux git fetch --no-tags linux-review Kent-Overstreet/Compiler-Attributes-add-__flatten/20230510-010302 git checkout 0e5d4229f5e7671dabba56ea36583b1ca20a9a18 # save the config file mkdir build_dir && cp config build_dir/.config COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=i386 olddefconfig COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=i386 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/202305101003.uncpRKqA-lkp@xxxxxxxxx/ All warnings (new ones prefixed by >>): >> lib/iov_iter.c:839:16: warning: comparison of distinct pointer types ('typeof (bytes) *' (aka 'unsigned int *') and 'typeof (((1UL) << 12) - (offset & (~(((1UL) << 12) - 1)))) *' (aka 'unsigned long *')) [-Wcompare-distinct-pointer-types] unsigned b = min(bytes, PAGE_SIZE - (offset & PAGE_MASK)); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 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 +839 lib/iov_iter.c 825 826 size_t copy_folio_from_iter_atomic(struct folio *folio, size_t offset, 827 size_t bytes, struct iov_iter *i) 828 { 829 size_t ret = 0; 830 831 if (WARN_ON(offset + bytes > folio_size(folio))) 832 return 0; 833 if (WARN_ON_ONCE(!i->data_source)) 834 return 0; 835 836 #ifdef CONFIG_HIGHMEM 837 while (bytes) { 838 struct page *page = folio_page(folio, offset >> PAGE_SHIFT); > 839 unsigned b = min(bytes, PAGE_SIZE - (offset & PAGE_MASK)); 840 unsigned r = __copy_page_from_iter_atomic(page, offset, b, i); 841 842 offset += r; 843 bytes -= r; 844 ret += r; 845 846 if (r != b) 847 break; 848 } 849 #else 850 ret = __copy_page_from_iter_atomic(&folio->page, offset, bytes, i); 851 #endif 852 853 return ret; 854 } 855 EXPORT_SYMBOL(copy_folio_from_iter_atomic); 856 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests
