Hi Thomas, kernel test robot noticed the following build warnings:
[auto build test WARNING on next-20240816] [cannot apply to drm-xe/drm-xe-next linus/master v6.11-rc3 v6.11-rc2 v6.11-rc1 v6.11-rc3] [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/Thomas-Hellstr-m/drm-ttm-Add-a-virtual-base-class-for-graphics-memory-backup/20240816-213947 base: next-20240816 patch link: https://lore.kernel.org/r/20240816133717.3102-6-thomas.hellstrom%40linux.intel.com patch subject: [PATCH v8 5/6] drm/xe: Add a shrinker for xe bos config: s390-allmodconfig (https://download.01.org/0day-ci/archive/20240817/202408170320.ssodtn1a-...@intel.com/config) compiler: clang version 20.0.0git (https://github.com/llvm/llvm-project 26670e7fa4f032a019d23d56c6a02926e854e8af) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240817/202408170320.ssodtn1a-...@intel.com/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 <l...@intel.com> | Closes: https://lore.kernel.org/oe-kbuild-all/202408170320.ssodtn1a-...@intel.com/ All warnings (new ones prefixed by >>): In file included from drivers/gpu/drm/xe/xe_bo.c:6: In file included from drivers/gpu/drm/xe/xe_bo.h:9: In file included from include/drm/ttm/ttm_tt.h:30: In file included from include/linux/pagemap.h:8: In file included from include/linux/mm.h:2199: include/linux/vmstat.h:504:43: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Wenum-enum-conversion] 504 | return vmstat_text[NR_VM_ZONE_STAT_ITEMS + | ~~~~~~~~~~~~~~~~~~~~~ ^ 505 | item]; | ~~~~ include/linux/vmstat.h:511:43: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Wenum-enum-conversion] 511 | return vmstat_text[NR_VM_ZONE_STAT_ITEMS + | ~~~~~~~~~~~~~~~~~~~~~ ^ 512 | NR_VM_NUMA_EVENT_ITEMS + | ~~~~~~~~~~~~~~~~~~~~~~ include/linux/vmstat.h:518:36: warning: arithmetic between different enumeration types ('enum node_stat_item' and 'enum lru_list') [-Wenum-enum-conversion] 518 | return node_stat_name(NR_LRU_BASE + lru) + 3; // skip "nr_" | ~~~~~~~~~~~ ^ ~~~ include/linux/vmstat.h:524:43: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Wenum-enum-conversion] 524 | return vmstat_text[NR_VM_ZONE_STAT_ITEMS + | ~~~~~~~~~~~~~~~~~~~~~ ^ 525 | NR_VM_NUMA_EVENT_ITEMS + | ~~~~~~~~~~~~~~~~~~~~~~ In file included from drivers/gpu/drm/xe/xe_bo.c:6: In file included from drivers/gpu/drm/xe/xe_bo.h:11: In file included from drivers/gpu/drm/xe/xe_bo_types.h:9: In file included from include/linux/iosys-map.h:10: In file included from include/linux/io.h:14: In file included from arch/s390/include/asm/io.h:93: include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 548 | val = __raw_readb(PCI_IOBASE + addr); | ~~~~~~~~~~ ^ include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 561 | val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr)); | ~~~~~~~~~~ ^ include/uapi/linux/byteorder/big_endian.h:37:59: note: expanded from macro '__le16_to_cpu' 37 | #define __le16_to_cpu(x) __swab16((__force __u16)(__le16)(x)) | ^ include/uapi/linux/swab.h:102:54: note: expanded from macro '__swab16' 102 | #define __swab16(x) (__u16)__builtin_bswap16((__u16)(x)) | ^ In file included from drivers/gpu/drm/xe/xe_bo.c:6: In file included from drivers/gpu/drm/xe/xe_bo.h:11: In file included from drivers/gpu/drm/xe/xe_bo_types.h:9: In file included from include/linux/iosys-map.h:10: In file included from include/linux/io.h:14: In file included from arch/s390/include/asm/io.h:93: include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 574 | val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr)); | ~~~~~~~~~~ ^ include/uapi/linux/byteorder/big_endian.h:35:59: note: expanded from macro '__le32_to_cpu' 35 | #define __le32_to_cpu(x) __swab32((__force __u32)(__le32)(x)) | ^ include/uapi/linux/swab.h:115:54: note: expanded from macro '__swab32' 115 | #define __swab32(x) (__u32)__builtin_bswap32((__u32)(x)) | ^ In file included from drivers/gpu/drm/xe/xe_bo.c:6: In file included from drivers/gpu/drm/xe/xe_bo.h:11: In file included from drivers/gpu/drm/xe/xe_bo_types.h:9: In file included from include/linux/iosys-map.h:10: In file included from include/linux/io.h:14: In file included from arch/s390/include/asm/io.h:93: include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 585 | __raw_writeb(value, PCI_IOBASE + addr); | ~~~~~~~~~~ ^ include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 595 | __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr); | ~~~~~~~~~~ ^ include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 605 | __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr); | ~~~~~~~~~~ ^ include/asm-generic/io.h:693:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 693 | readsb(PCI_IOBASE + addr, buffer, count); | ~~~~~~~~~~ ^ include/asm-generic/io.h:701:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 701 | readsw(PCI_IOBASE + addr, buffer, count); | ~~~~~~~~~~ ^ include/asm-generic/io.h:709:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 709 | readsl(PCI_IOBASE + addr, buffer, count); | ~~~~~~~~~~ ^ include/asm-generic/io.h:718:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 718 | writesb(PCI_IOBASE + addr, buffer, count); | ~~~~~~~~~~ ^ include/asm-generic/io.h:727:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 727 | writesw(PCI_IOBASE + addr, buffer, count); | ~~~~~~~~~~ ^ include/asm-generic/io.h:736:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic] 736 | writesl(PCI_IOBASE + addr, buffer, count); | ~~~~~~~~~~ ^ In file included from drivers/gpu/drm/xe/xe_bo.c:2496: >> drivers/gpu/drm/xe/tests/xe_bo.c:462:42: warning: variable 'bo' is >> uninitialized when used here [-Wuninitialized] 462 | struct xe_ttm_tt *xe_tt = container_of(bo->ttm.ttm, typeof(*xe_tt), ttm); | ^~ include/linux/container_of.h:19:26: note: expanded from macro 'container_of' 19 | void *__mptr = (void *)(ptr); \ | ^~~ drivers/gpu/drm/xe/tests/xe_bo.c:460:19: note: initialize the variable 'bo' to silence this warning 460 | struct xe_bo *bo; | ^ | = NULL 17 warnings generated. vim +/bo +462 drivers/gpu/drm/xe/tests/xe_bo.c 430 431 /* 432 * Try to create system bos corresponding to twice the amount 433 * of available system memory to test shrinker functionality. 434 * If no swap space is available to accommodate the 435 * memory overcommit, mark bos purgeable. 436 */ 437 static int shrink_test_run_device(struct xe_device *xe) 438 { 439 struct kunit *test = kunit_get_current_test(); 440 LIST_HEAD(bos); 441 struct xe_bo_link *link, *next; 442 struct sysinfo si; 443 size_t total, alloced; 444 unsigned int interrupted = 0, successful = 0, count = 0; 445 struct rnd_state prng; 446 u64 rand_seed; 447 bool failed = false; 448 449 rand_seed = get_random_u64(); 450 prandom_seed_state(&prng, rand_seed); 451 452 si_meminfo(&si); 453 total = si.freeram * si.mem_unit; 454 455 kunit_info(test, "Free ram is %lu bytes. Will allocate twice of that.\n", 456 (unsigned long)total); 457 458 total <<= 1; 459 for (alloced = 0; alloced < total ; alloced += XE_BO_SHRINK_SIZE) { 460 struct xe_bo *bo; 461 unsigned int mem_type; > 462 struct xe_ttm_tt *xe_tt = container_of(bo->ttm.ttm, > typeof(*xe_tt), ttm); 463 464 link = kzalloc(sizeof(*link), GFP_KERNEL); 465 if (!link) { 466 KUNIT_FAIL(test, "Unexpected link allocation failure\n"); 467 failed = true; 468 break; 469 } 470 471 INIT_LIST_HEAD(&link->link); 472 473 /* We can create bos using WC caching here. But it is slower. */ 474 bo = xe_bo_create_user(xe, NULL, NULL, XE_BO_SHRINK_SIZE, 475 DRM_XE_GEM_CPU_CACHING_WB, 476 ttm_bo_type_device, 477 XE_BO_FLAG_SYSTEM); 478 if (IS_ERR(bo)) { 479 if (bo != ERR_PTR(-ENOMEM) && bo != ERR_PTR(-ENOSPC) && 480 bo != ERR_PTR(-EINTR) && bo != ERR_PTR(-ERESTARTSYS)) 481 KUNIT_FAIL(test, "Error creating bo: %pe\n", bo); 482 kfree(link); 483 failed = true; 484 break; 485 } 486 xe_bo_lock(bo, false); 487 xe_tt = container_of(bo->ttm.ttm, typeof(*xe_tt), ttm); 488 489 /* 490 * If we're low on swap entries, we can't shrink unless the bo 491 * is marked purgeable. 492 */ 493 if (get_nr_swap_pages() < (XE_BO_SHRINK_SIZE >> PAGE_SHIFT) * 128) { 494 long num_pages = xe_tt->ttm.num_pages; 495 496 xe_tt->purgeable = true; 497 xe_shrinker_mod_pages(xe->mem.shrinker, -num_pages, 498 num_pages); 499 } else { 500 int ret = shrink_test_fill_random(bo, &prng, link); 501 502 if (ret) { 503 xe_bo_unlock(bo); 504 xe_bo_put(bo); 505 KUNIT_FAIL(test, "Error filling bo with random data: %pe\n", 506 ERR_PTR(ret)); 507 kfree(link); 508 failed = true; 509 break; 510 } 511 } 512 513 mem_type = bo->ttm.resource->mem_type; 514 xe_bo_unlock(bo); 515 link->bo = bo; 516 list_add_tail(&link->link, &bos); 517 518 if (mem_type != XE_PL_TT) { 519 KUNIT_FAIL(test, "Bo in incorrect memory type: %u\n", 520 bo->ttm.resource->mem_type); 521 failed = true; 522 } 523 cond_resched(); 524 if (signal_pending(current)) 525 break; 526 } 527 528 /* 529 * Read back and destroy bos. Reset the pseudo-random seed to get an 530 * identical pseudo-random number sequence for readback. 531 */ 532 prandom_seed_state(&prng, rand_seed); 533 list_for_each_entry_safe(link, next, &bos, link) { 534 static struct ttm_operation_ctx ctx = {.interruptible = true}; 535 struct xe_bo *bo = link->bo; 536 struct xe_ttm_tt *xe_tt; 537 int ret; 538 539 count++; 540 if (!signal_pending(current) && !failed) { 541 bool purgeable, intr = false; 542 543 xe_bo_lock(bo, NULL); 544 545 /* xe_tt->purgeable is cleared on validate. */ 546 xe_tt = container_of(bo->ttm.ttm, typeof(*xe_tt), ttm); 547 purgeable = xe_tt->purgeable; 548 do { 549 ret = ttm_bo_validate(&bo->ttm, &tt_placement, &ctx); 550 if (ret == -EINTR) 551 intr = true; 552 } while (ret == -EINTR && !signal_pending(current)); 553 554 if (!ret && !purgeable) 555 failed = shrink_test_verify(test, bo, count, &prng, link); 556 557 xe_bo_unlock(bo); 558 if (ret) { 559 KUNIT_FAIL(test, "Validation failed: %pe\n", 560 ERR_PTR(ret)); 561 failed = true; 562 } else if (intr) { 563 interrupted++; 564 } else { 565 successful++; 566 } 567 } 568 xe_bo_put(link->bo); 569 list_del(&link->link); 570 kfree(link); 571 } 572 kunit_info(test, "Readbacks interrupted: %u successful: %u\n", 573 interrupted, successful); 574 575 return 0; 576 } 577 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
