tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master head: 2102cb0d050d34d50b9642a3a50861787527e922 commit: 41bb9aa5f614423659ced668d0f1ff0c1da6552e [6728/7105] mm: extend rmap flags arguments for folio_add_new_anon_rmap config: arm-pxa910_defconfig (https://download.01.org/0day-ci/archive/20240620/202406200059.tVU9semU-lkp@xxxxxxxxx/config) compiler: arm-linux-gnueabi-gcc (GCC) 13.2.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240620/202406200059.tVU9semU-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/202406200059.tVU9semU-lkp@xxxxxxxxx/ All warnings (new ones prefixed by >>): >> mm/rmap.c:1413: warning: Function parameter or struct member 'flags' not described in 'folio_add_new_anon_rmap' vim +1413 mm/rmap.c 8bd5130070fbf2 David Hildenbrand 2023-12-20 1398 43d8eac44f28d3 Randy Dunlap 2008-03-19 1399 /** 4d510f3da4c216 Matthew Wilcox (Oracle 2023-01-11 1400) * folio_add_new_anon_rmap - Add mapping to a new anonymous folio. 4d510f3da4c216 Matthew Wilcox (Oracle 2023-01-11 1401) * @folio: The folio to add the mapping to. 9617d95e6e9ffd Nicholas Piggin 2006-01-06 1402 * @vma: the vm area in which the mapping is added 9617d95e6e9ffd Nicholas Piggin 2006-01-06 1403 * @address: the user virtual address mapped 40f2bbf71161fa David Hildenbrand 2022-05-09 1404 * 84f0169e6c8a61 David Hildenbrand 2023-12-20 1405 * Like folio_add_anon_rmap_*() but must only be called on *new* folios. 9617d95e6e9ffd Nicholas Piggin 2006-01-06 1406 * This means the inc-and-test can be bypassed. 4d510f3da4c216 Matthew Wilcox (Oracle 2023-01-11 1407) * The folio does not have to be locked. 4d510f3da4c216 Matthew Wilcox (Oracle 2023-01-11 1408) * 41bb9aa5f61442 Barry Song 2024-06-18 1409 * If the folio is pmd-mappable, it is accounted as a THP. 9617d95e6e9ffd Nicholas Piggin 2006-01-06 1410 */ 4d510f3da4c216 Matthew Wilcox (Oracle 2023-01-11 1411) void folio_add_new_anon_rmap(struct folio *folio, struct vm_area_struct *vma, 41bb9aa5f61442 Barry Song 2024-06-18 1412 unsigned long address, rmap_t flags) 9617d95e6e9ffd Nicholas Piggin 2006-01-06 @1413 { 372cbd4d5a0665 Ryan Roberts 2023-12-07 1414 int nr = folio_nr_pages(folio); c2784aaa21dc56 Yosry Ahmed 2024-05-06 1415 int nr_pmdmapped = 0; 41bb9aa5f61442 Barry Song 2024-06-18 1416 bool exclusive = flags & RMAP_EXCLUSIVE; d281ee61451835 Kirill A. Shutemov 2016-01-15 1417 a4ea18641d8330 David Hildenbrand 2023-12-20 1418 VM_WARN_ON_FOLIO(folio_test_hugetlb(folio), folio); 372cbd4d5a0665 Ryan Roberts 2023-12-07 1419 VM_BUG_ON_VMA(address < vma->vm_start || 372cbd4d5a0665 Ryan Roberts 2023-12-07 1420 address + (nr << PAGE_SHIFT) > vma->vm_end, vma); 4d510f3da4c216 Matthew Wilcox (Oracle 2023-01-11 1421) __folio_set_swapbacked(folio); 41bb9aa5f61442 Barry Song 2024-06-18 1422 __folio_set_anon(folio, vma, address, exclusive); d8dd5e979d09c7 Hugh Dickins 2022-11-09 1423 372cbd4d5a0665 Ryan Roberts 2023-12-07 1424 if (likely(!folio_test_large(folio))) { d8dd5e979d09c7 Hugh Dickins 2022-11-09 1425 /* increment count (starts at -1) */ 4d510f3da4c216 Matthew Wilcox (Oracle 2023-01-11 1426) atomic_set(&folio->_mapcount, 0); 41bb9aa5f61442 Barry Song 2024-06-18 1427 if (exclusive) 372cbd4d5a0665 Ryan Roberts 2023-12-07 1428 SetPageAnonExclusive(&folio->page); 372cbd4d5a0665 Ryan Roberts 2023-12-07 1429 } else if (!folio_test_pmd_mappable(folio)) { 372cbd4d5a0665 Ryan Roberts 2023-12-07 1430 int i; 372cbd4d5a0665 Ryan Roberts 2023-12-07 1431 372cbd4d5a0665 Ryan Roberts 2023-12-07 1432 for (i = 0; i < nr; i++) { 372cbd4d5a0665 Ryan Roberts 2023-12-07 1433 struct page *page = folio_page(folio, i); 372cbd4d5a0665 Ryan Roberts 2023-12-07 1434 372cbd4d5a0665 Ryan Roberts 2023-12-07 1435 /* increment count (starts at -1) */ 372cbd4d5a0665 Ryan Roberts 2023-12-07 1436 atomic_set(&page->_mapcount, 0); 41bb9aa5f61442 Barry Song 2024-06-18 1437 if (exclusive) 372cbd4d5a0665 Ryan Roberts 2023-12-07 1438 SetPageAnonExclusive(page); 372cbd4d5a0665 Ryan Roberts 2023-12-07 1439 } 372cbd4d5a0665 Ryan Roberts 2023-12-07 1440 05c5323b2a344c David Hildenbrand 2024-04-09 1441 /* increment count (starts at -1) */ 05c5323b2a344c David Hildenbrand 2024-04-09 1442 atomic_set(&folio->_large_mapcount, nr - 1); 372cbd4d5a0665 Ryan Roberts 2023-12-07 1443 atomic_set(&folio->_nr_pages_mapped, nr); d8dd5e979d09c7 Hugh Dickins 2022-11-09 1444 } else { 53f9263baba69f Kirill A. Shutemov 2016-01-15 1445 /* increment count (starts at -1) */ 4d510f3da4c216 Matthew Wilcox (Oracle 2023-01-11 1446) atomic_set(&folio->_entire_mapcount, 0); 05c5323b2a344c David Hildenbrand 2024-04-09 1447 /* increment count (starts at -1) */ 05c5323b2a344c David Hildenbrand 2024-04-09 1448 atomic_set(&folio->_large_mapcount, 0); e78a13fd16bb9d David Hildenbrand 2023-12-20 1449 atomic_set(&folio->_nr_pages_mapped, ENTIRELY_MAPPED); 41bb9aa5f61442 Barry Song 2024-06-18 1450 if (exclusive) 372cbd4d5a0665 Ryan Roberts 2023-12-07 1451 SetPageAnonExclusive(&folio->page); c2784aaa21dc56 Yosry Ahmed 2024-05-06 1452 nr_pmdmapped = nr; d281ee61451835 Kirill A. Shutemov 2016-01-15 1453 } d8dd5e979d09c7 Hugh Dickins 2022-11-09 1454 c2784aaa21dc56 Yosry Ahmed 2024-05-06 1455 __folio_mod_stat(folio, nr, nr_pmdmapped); 9617d95e6e9ffd Nicholas Piggin 2006-01-06 1456 } 9617d95e6e9ffd Nicholas Piggin 2006-01-06 1457 :::::: The code at line 1413 was first introduced by commit :::::: 9617d95e6e9ffd883cf90a89724fe60d7ab22f9a [PATCH] mm: rmap optimisation :::::: TO: Nick Piggin <nickpiggin@xxxxxxxxxxxx> :::::: CC: Linus Torvalds <torvalds@xxxxxxxxxxx> -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
