Hi Liam, kernel test robot noticed the following build warnings: [auto build test WARNING on akpm-mm/mm-everything] [also build test WARNING on linus/master v6.3 next-20230425] [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/Liam-R-Howlett/maple_tree-Fix-static-analyser-cppcheck-issue/20230425-233958 base: https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-everything patch link: https://lore.kernel.org/r/20230425140955.3834476-28-Liam.Howlett%40oracle.com patch subject: [PATCH 27/34] maple_tree: Introduce mas_next_slot() interface config: x86_64-randconfig-a003-20230424 (https://download.01.org/0day-ci/archive/20230426/202304260907.iHgOR74J-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/0e736b8a8054e7f0b216320d2458a00b54fcd2b0 git remote add linux-review https://github.com/intel-lab-lkp/linux git fetch --no-tags linux-review Liam-R-Howlett/maple_tree-Fix-static-analyser-cppcheck-issue/20230425-233958 git checkout 0e736b8a8054e7f0b216320d2458a00b54fcd2b0 # save the config file mkdir build_dir && cp config build_dir/.config COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=x86_64 olddefconfig COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=x86_64 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/202304260907.iHgOR74J-lkp@xxxxxxxxx/ All warnings (new ones prefixed by >>): >> lib/maple_tree.c:4710:7: warning: no previous prototype for function 'mas_next_slot' [-Wmissing-prototypes] void *mas_next_slot(struct ma_state *mas, unsigned long max) ^ lib/maple_tree.c:4710:1: note: declare 'static' if the function is not intended to be used outside of this translation unit void *mas_next_slot(struct ma_state *mas, unsigned long max) ^ static lib/maple_tree.c:4780:10: error: implicit declaration of function 'mas_next_slot_limit' is invalid in C99 [-Werror,-Wimplicit-function-declaration] entry = mas_next_slot_limit(mas, limit); ^ lib/maple_tree.c:4780:10: note: did you mean 'mas_next_slot'? lib/maple_tree.c:4710:7: note: 'mas_next_slot' declared here void *mas_next_slot(struct ma_state *mas, unsigned long max) ^ lib/maple_tree.c:4780:8: warning: incompatible integer to pointer conversion assigning to 'void *' from 'int' [-Wint-conversion] entry = mas_next_slot_limit(mas, limit); ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ lib/maple_tree.c:4787:9: warning: incompatible integer to pointer conversion returning 'int' from a function with result type 'void *' [-Wint-conversion] return mas_next_slot_limit(mas, limit); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 3 warnings and 1 error generated. vim +/mas_next_slot +4710 lib/maple_tree.c 4701 4702 /* 4703 * mas_next_slot() - Get the entry in the next slot 4704 * 4705 * @mas: The maple state 4706 * @max: The maximum starting range 4707 * 4708 * Return: The entry in the next slot which is possibly NULL 4709 */ > 4710 void *mas_next_slot(struct ma_state *mas, unsigned long max) 4711 { 4712 void __rcu **slots; 4713 unsigned long *pivots; 4714 unsigned long pivot; 4715 enum maple_type type; 4716 struct maple_node *node; 4717 unsigned char data_end; 4718 unsigned long save_point = mas->last; 4719 void *entry; 4720 4721 retry: 4722 node = mas_mn(mas); 4723 type = mte_node_type(mas->node); 4724 pivots = ma_pivots(node, type); 4725 data_end = ma_data_end(node, type, pivots, mas->max); 4726 pivot = mas_logical_pivot(mas, pivots, mas->offset, type); 4727 if (unlikely(mas_rewalk_if_dead(mas, node, save_point))) 4728 goto retry; 4729 4730 if (pivot >= max) 4731 return NULL; 4732 4733 if (likely(data_end > mas->offset)) { 4734 mas->offset++; 4735 mas->index = mas->last + 1; 4736 } else { 4737 if (mas_next_node(mas, node, max)) { 4738 mas_rewalk(mas, save_point); 4739 goto retry; 4740 } 4741 4742 if (mas_is_none(mas)) 4743 return NULL; 4744 4745 mas->offset = 0; 4746 mas->index = mas->min; 4747 node = mas_mn(mas); 4748 type = mte_node_type(mas->node); 4749 pivots = ma_pivots(node, type); 4750 } 4751 4752 slots = ma_slots(node, type); 4753 mas->last = mas_logical_pivot(mas, pivots, mas->offset, type); 4754 entry = mas_slot(mas, slots, mas->offset); 4755 if (unlikely(mas_rewalk_if_dead(mas, node, save_point))) 4756 goto retry; 4757 4758 return entry; 4759 } 4760 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests
