Hi Lang, Thank you for the patch! Yet something to improve: [auto build test ERROR on hnaz-mm/master] url: https://github.com/0day-ci/linux/commits/Lang-Yu/mm-kmemleak-Avoid-scanning-potential-huge-holes/20211105-115425 base: https://github.com/hnaz/linux-mm master config: xtensa-allyesconfig (attached as .config) compiler: xtensa-linux-gcc (GCC) 11.2.0 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/0day-ci/linux/commit/d455f236523de8c6b91774a74eb3163d2ff16e2e git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Lang-Yu/mm-kmemleak-Avoid-scanning-potential-huge-holes/20211105-115425 git checkout d455f236523de8c6b91774a74eb3163d2ff16e2e # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross ARCH=xtensa If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> All errors (new ones prefixed by >>): mm/kmemleak.c: In function 'kmemleak_scan': >> mm/kmemleak.c:1407:13: error: unused variable 'i' [-Werror=unused-variable] 1407 | int i; | ^ cc1: all warnings being treated as errors vim +/i +1407 mm/kmemleak.c 04609ccc40c4e8 Catalin Marinas 2009-10-28 1396 3c7b4e6b8be4c1 Catalin Marinas 2009-06-11 1397 /* 3c7b4e6b8be4c1 Catalin Marinas 2009-06-11 1398 * Scan data sections and all the referenced memory blocks allocated via the 3c7b4e6b8be4c1 Catalin Marinas 2009-06-11 1399 * kernel's standard allocators. This function must be called with the 3c7b4e6b8be4c1 Catalin Marinas 2009-06-11 1400 * scan_mutex held. 3c7b4e6b8be4c1 Catalin Marinas 2009-06-11 1401 */ 3c7b4e6b8be4c1 Catalin Marinas 2009-06-11 1402 static void kmemleak_scan(void) 3c7b4e6b8be4c1 Catalin Marinas 2009-06-11 1403 { 3c7b4e6b8be4c1 Catalin Marinas 2009-06-11 1404 unsigned long flags; 04609ccc40c4e8 Catalin Marinas 2009-10-28 1405 struct kmemleak_object *object; d455f236523de8 Lang Yu 2021-11-05 1406 struct zone *zone; 3c7b4e6b8be4c1 Catalin Marinas 2009-06-11 @1407 int i; 4698c1f2bbe44c Catalin Marinas 2009-06-26 1408 int new_leaks = 0; 3c7b4e6b8be4c1 Catalin Marinas 2009-06-11 1409 acf4968ec9dea4 Catalin Marinas 2009-06-26 1410 jiffies_last_scan = jiffies; acf4968ec9dea4 Catalin Marinas 2009-06-26 1411 3c7b4e6b8be4c1 Catalin Marinas 2009-06-11 1412 /* prepare the kmemleak_object's */ 3c7b4e6b8be4c1 Catalin Marinas 2009-06-11 1413 rcu_read_lock(); 3c7b4e6b8be4c1 Catalin Marinas 2009-06-11 1414 list_for_each_entry_rcu(object, &object_list, object_list) { 8c96f1bc6fc49c He Zhe 2020-01-30 1415 raw_spin_lock_irqsave(&object->lock, flags); 3c7b4e6b8be4c1 Catalin Marinas 2009-06-11 1416 #ifdef DEBUG 3c7b4e6b8be4c1 Catalin Marinas 2009-06-11 1417 /* 3c7b4e6b8be4c1 Catalin Marinas 2009-06-11 1418 * With a few exceptions there should be a maximum of 3c7b4e6b8be4c1 Catalin Marinas 2009-06-11 1419 * 1 reference to any object at this point. 3c7b4e6b8be4c1 Catalin Marinas 2009-06-11 1420 */ 3c7b4e6b8be4c1 Catalin Marinas 2009-06-11 1421 if (atomic_read(&object->use_count) > 1) { ae281064be1643 Joe Perches 2009-06-23 1422 pr_debug("object->use_count = %d\n", 3c7b4e6b8be4c1 Catalin Marinas 2009-06-11 1423 atomic_read(&object->use_count)); 3c7b4e6b8be4c1 Catalin Marinas 2009-06-11 1424 dump_object_info(object); 3c7b4e6b8be4c1 Catalin Marinas 2009-06-11 1425 } 3c7b4e6b8be4c1 Catalin Marinas 2009-06-11 1426 #endif 3c7b4e6b8be4c1 Catalin Marinas 2009-06-11 1427 /* reset the reference count (whiten the object) */ 3c7b4e6b8be4c1 Catalin Marinas 2009-06-11 1428 object->count = 0; 3c7b4e6b8be4c1 Catalin Marinas 2009-06-11 1429 if (color_gray(object) && get_object(object)) 3c7b4e6b8be4c1 Catalin Marinas 2009-06-11 1430 list_add_tail(&object->gray_list, &gray_list); 3c7b4e6b8be4c1 Catalin Marinas 2009-06-11 1431 8c96f1bc6fc49c He Zhe 2020-01-30 1432 raw_spin_unlock_irqrestore(&object->lock, flags); 3c7b4e6b8be4c1 Catalin Marinas 2009-06-11 1433 } 3c7b4e6b8be4c1 Catalin Marinas 2009-06-11 1434 rcu_read_unlock(); 3c7b4e6b8be4c1 Catalin Marinas 2009-06-11 1435 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
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