Hi David, kernel test robot noticed the following build warnings: [auto build test WARNING on akpm-mm/mm-everything] [also build test WARNING on linus/master crng-random/master v6.5-rc3 next-20230728] [cannot apply to next-20230725] [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/David-Laight/minmax-Allow-min-max-clamp-if-the-arguments-have-the-same-signedness/20230725-204940 base: https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-everything patch link: https://lore.kernel.org/r/48c2cd0407f14859919d4fcbe526234a%40AcuMS.aculab.com patch subject: [PATCH next resend 5/5] minmax: Relax check to allow comparison between int and small unsigned constants. config: xtensa-randconfig-r093-20230725 (https://download.01.org/0day-ci/archive/20230728/202307281556.iTVIR4tJ-lkp@xxxxxxxxx/config) compiler: xtensa-linux-gcc (GCC) 12.3.0 reproduce: (https://download.01.org/0day-ci/archive/20230728/202307281556.iTVIR4tJ-lkp@xxxxxxxxx/reproduce) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <lkp@xxxxxxxxx> | Closes: https://lore.kernel.org/oe-kbuild-all/202307281556.iTVIR4tJ-lkp@xxxxxxxxx/ sparse warnings: (new ones prefixed by >>) mm/kmemleak.c: note: in included file (through arch/xtensa/include/asm/bitops.h, include/linux/bitops.h, include/linux/kernel.h): arch/xtensa/include/asm/processor.h:103:2: sparse: sparse: Unsupported xtensa ABI arch/xtensa/include/asm/processor.h:133:2: sparse: sparse: Unsupported Xtensa ABI >> mm/kmemleak.c:1429:32: sparse: sparse: incompatible types for operation (>=): >> mm/kmemleak.c:1429:32: sparse: void * >> mm/kmemleak.c:1429:32: sparse: int >> mm/kmemleak.c:1429:32: sparse: sparse: bad constant expression type >> mm/kmemleak.c:1429:32: sparse: sparse: incompatible types for operation (>=): >> mm/kmemleak.c:1429:32: sparse: void * >> mm/kmemleak.c:1429:32: sparse: int >> mm/kmemleak.c:1429:32: sparse: sparse: incompatible types for operation (>=): >> mm/kmemleak.c:1429:32: sparse: void *end >> mm/kmemleak.c:1429:32: sparse: int >> mm/kmemleak.c:1429:32: sparse: sparse: incompatible types for operation (>=): >> mm/kmemleak.c:1429:32: sparse: void * >> mm/kmemleak.c:1429:32: sparse: int >> mm/kmemleak.c:1429:32: sparse: sparse: incompatible types for operation (>=): >> mm/kmemleak.c:1429:32: sparse: void *end >> mm/kmemleak.c:1429:32: sparse: int mm/kmemleak.c:1429:32: sparse: sparse: incompatible types for operation (<): mm/kmemleak.c:1429:32: sparse: bad type __UNIQUE_ID___x229 mm/kmemleak.c:1429:32: sparse: bad type __UNIQUE_ID___y230 vim +1429 mm/kmemleak.c 3c7b4e6b8be4c1 Catalin Marinas 2009-06-11 1396 3c7b4e6b8be4c1 Catalin Marinas 2009-06-11 1397 /* 3c7b4e6b8be4c1 Catalin Marinas 2009-06-11 1398 * Scan a memory block corresponding to a kmemleak_object. A condition is 3c7b4e6b8be4c1 Catalin Marinas 2009-06-11 1399 * that object->use_count >= 1. 3c7b4e6b8be4c1 Catalin Marinas 2009-06-11 1400 */ 3c7b4e6b8be4c1 Catalin Marinas 2009-06-11 1401 static void scan_object(struct kmemleak_object *object) 3c7b4e6b8be4c1 Catalin Marinas 2009-06-11 1402 { 3c7b4e6b8be4c1 Catalin Marinas 2009-06-11 1403 struct kmemleak_scan_area *area; 3c7b4e6b8be4c1 Catalin Marinas 2009-06-11 1404 unsigned long flags; 0c24e061196c21 Patrick Wang 2022-06-11 1405 void *obj_ptr; 3c7b4e6b8be4c1 Catalin Marinas 2009-06-11 1406 3c7b4e6b8be4c1 Catalin Marinas 2009-06-11 1407 /* 21ae2956ce289f Uwe Kleine-König 2009-10-07 1408 * Once the object->lock is acquired, the corresponding memory block 21ae2956ce289f Uwe Kleine-König 2009-10-07 1409 * cannot be freed (the same lock is acquired in delete_object). 3c7b4e6b8be4c1 Catalin Marinas 2009-06-11 1410 */ 8c96f1bc6fc49c He Zhe 2020-01-30 1411 raw_spin_lock_irqsave(&object->lock, flags); 3c7b4e6b8be4c1 Catalin Marinas 2009-06-11 1412 if (object->flags & OBJECT_NO_SCAN) 3c7b4e6b8be4c1 Catalin Marinas 2009-06-11 1413 goto out; 3c7b4e6b8be4c1 Catalin Marinas 2009-06-11 1414 if (!(object->flags & OBJECT_ALLOCATED)) 3c7b4e6b8be4c1 Catalin Marinas 2009-06-11 1415 /* already freed object */ 3c7b4e6b8be4c1 Catalin Marinas 2009-06-11 1416 goto out; 0c24e061196c21 Patrick Wang 2022-06-11 1417 0c24e061196c21 Patrick Wang 2022-06-11 1418 obj_ptr = object->flags & OBJECT_PHYS ? 0c24e061196c21 Patrick Wang 2022-06-11 1419 __va((phys_addr_t)object->pointer) : 0c24e061196c21 Patrick Wang 2022-06-11 1420 (void *)object->pointer; 0c24e061196c21 Patrick Wang 2022-06-11 1421 dba82d9431770e Catalin Marinas 2019-09-23 1422 if (hlist_empty(&object->area_list) || dba82d9431770e Catalin Marinas 2019-09-23 1423 object->flags & OBJECT_FULL_SCAN) { 0c24e061196c21 Patrick Wang 2022-06-11 1424 void *start = obj_ptr; 0c24e061196c21 Patrick Wang 2022-06-11 1425 void *end = obj_ptr + object->size; 93ada579b0eea0 Catalin Marinas 2015-06-24 1426 void *next; af98603dad87e3 Catalin Marinas 2009-08-27 1427 93ada579b0eea0 Catalin Marinas 2015-06-24 1428 do { 93ada579b0eea0 Catalin Marinas 2015-06-24 @1429 next = min(start + MAX_SCAN_SIZE, end); 93ada579b0eea0 Catalin Marinas 2015-06-24 1430 scan_block(start, next, object); 93ada579b0eea0 Catalin Marinas 2015-06-24 1431 93ada579b0eea0 Catalin Marinas 2015-06-24 1432 start = next; 93ada579b0eea0 Catalin Marinas 2015-06-24 1433 if (start >= end) 93ada579b0eea0 Catalin Marinas 2015-06-24 1434 break; af98603dad87e3 Catalin Marinas 2009-08-27 1435 8c96f1bc6fc49c He Zhe 2020-01-30 1436 raw_spin_unlock_irqrestore(&object->lock, flags); af98603dad87e3 Catalin Marinas 2009-08-27 1437 cond_resched(); 8c96f1bc6fc49c He Zhe 2020-01-30 1438 raw_spin_lock_irqsave(&object->lock, flags); 93ada579b0eea0 Catalin Marinas 2015-06-24 1439 } while (object->flags & OBJECT_ALLOCATED); af98603dad87e3 Catalin Marinas 2009-08-27 1440 } else b67bfe0d42cac5 Sasha Levin 2013-02-27 1441 hlist_for_each_entry(area, &object->area_list, node) c017b4be3e8417 Catalin Marinas 2009-10-28 1442 scan_block((void *)area->start, c017b4be3e8417 Catalin Marinas 2009-10-28 1443 (void *)(area->start + area->size), 93ada579b0eea0 Catalin Marinas 2015-06-24 1444 object); 3c7b4e6b8be4c1 Catalin Marinas 2009-06-11 1445 out: 8c96f1bc6fc49c He Zhe 2020-01-30 1446 raw_spin_unlock_irqrestore(&object->lock, flags); 3c7b4e6b8be4c1 Catalin Marinas 2009-06-11 1447 } 3c7b4e6b8be4c1 Catalin Marinas 2009-06-11 1448 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
