mm/memory-failure.c:1841:51: warning: passing argument 1 of 'folio_test_hugetlb_raw_hwp_unreliable' discards 'const' qualifier from pointer target type
kernel test robot <[email protected]> Wed, 05 Aug 2026 03:57:29 +0200
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tree: https://github.com/intel-lab-lkp/linux/commits/Matthew-Wilcox-Oracle/hugetlbfs-Set-mapping-folio-order/20260804-172347 head: 6bf87769bcecfb8455f6ece8025ec19bdf1468cb commit: a2cb2ad150519951a14725d0213ba0b0afe13c71 mm: Handle hugetlb correctly in is_page_hwpoison() date: 17 hours ago config: x86_64-rhel-9.4-bpf (https://download.01.org/0day-ci/archive/20260805/[email protected]/config) compiler: gcc-14 (Debian 14.2.0-19) 14.2.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260805/[email protected]/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 <[email protected]> | Closes: https://lore.kernel.org/oe-kbuild-all/[email protected]/ All warnings (new ones prefixed by >>): mm/memory-failure.c: In function 'hugetlb_page_hwpoison': >> mm/memory-failure.c:1841:51: warning: passing argument 1 of 'folio_test_hugetlb_raw_hwp_unreliable' discards 'const' qualifier from pointer target type [-Wdiscarded-qualifiers] 1841 | if (folio_test_hugetlb_raw_hwp_unreliable(folio)) | ^~~~~ In file included from include/linux/migrate.h:8, from mm/memory-failure.c:52: include/linux/hugetlb.h:598:48: note: expected 'struct folio *' but argument is of type 'const struct folio *' 598 | bool folio_test_hugetlb_##flname(struct folio *folio) \ | ~~~~~~~~~~~~~~^~~~~ include/linux/hugetlb.h:634:9: note: in expansion of macro 'TESTHPAGEFLAG' 634 | TESTHPAGEFLAG(uname, flname) \ | ^~~~~~~~~~~~~ include/linux/hugetlb.h:646:1: note: in expansion of macro 'HPAGEFLAG' 646 | HPAGEFLAG(RawHwpUnreliable, raw_hwp_unreliable) | ^~~~~~~~~ >> mm/memory-failure.c:1846:42: warning: passing argument 1 of 'raw_hwp_list_head' discards 'const' qualifier from pointer target type [-Wdiscarded-qualifiers] 1846 | raw_hwp_head = raw_hwp_list_head(folio); | ^~~~~ mm/memory-failure.c:1820:66: note: expected 'struct folio *' but argument is of type 'const struct folio *' 1820 | static inline struct llist_head *raw_hwp_list_head(struct folio *folio) | ~~~~~~~~~~~~~~^~~~~ vim +1841 mm/memory-failure.c 161df60e9e8965 Naoya Horiguchi 2022-07-14 1824 a2cb2ad1505199 Matthew Wilcox (Oracle 2026-07-07 1825) /* a2cb2ad1505199 Matthew Wilcox (Oracle 2026-07-07 1826) * Check if a given @page in a hugetlb folio is HWPOISON. a2cb2ad1505199 Matthew Wilcox (Oracle 2026-07-07 1827) */ a2cb2ad1505199 Matthew Wilcox (Oracle 2026-07-07 1828) bool hugetlb_page_hwpoison(const struct folio *folio, const struct page *page) b79f8eb408d046 Jiaqi Yan 2023-07-13 1829 { b79f8eb408d046 Jiaqi Yan 2023-07-13 1830 struct llist_head *raw_hwp_head; b79f8eb408d046 Jiaqi Yan 2023-07-13 1831 struct raw_hwp_page *p; b79f8eb408d046 Jiaqi Yan 2023-07-13 1832 bool ret = false; b79f8eb408d046 Jiaqi Yan 2023-07-13 1833 b79f8eb408d046 Jiaqi Yan 2023-07-13 1834 if (!folio_test_hwpoison(folio)) b79f8eb408d046 Jiaqi Yan 2023-07-13 1835 return false; b79f8eb408d046 Jiaqi Yan 2023-07-13 1836 b79f8eb408d046 Jiaqi Yan 2023-07-13 1837 /* b79f8eb408d046 Jiaqi Yan 2023-07-13 1838 * When RawHwpUnreliable is set, kernel lost track of which subpages b79f8eb408d046 Jiaqi Yan 2023-07-13 1839 * are HWPOISON. So return as if ALL subpages are HWPOISONed. b79f8eb408d046 Jiaqi Yan 2023-07-13 1840 */ b79f8eb408d046 Jiaqi Yan 2023-07-13 @1841 if (folio_test_hugetlb_raw_hwp_unreliable(folio)) b79f8eb408d046 Jiaqi Yan 2023-07-13 1842 return true; b79f8eb408d046 Jiaqi Yan 2023-07-13 1843 b79f8eb408d046 Jiaqi Yan 2023-07-13 1844 mutex_lock(&mf_mutex); b79f8eb408d046 Jiaqi Yan 2023-07-13 1845 b79f8eb408d046 Jiaqi Yan 2023-07-13 @1846 raw_hwp_head = raw_hwp_list_head(folio); b79f8eb408d046 Jiaqi Yan 2023-07-13 1847 llist_for_each_entry(p, raw_hwp_head->first, node) { b79f8eb408d046 Jiaqi Yan 2023-07-13 1848 if (page == p->page) { b79f8eb408d046 Jiaqi Yan 2023-07-13 1849 ret = true; b79f8eb408d046 Jiaqi Yan 2023-07-13 1850 break; b79f8eb408d046 Jiaqi Yan 2023-07-13 1851 } b79f8eb408d046 Jiaqi Yan 2023-07-13 1852 } b79f8eb408d046 Jiaqi Yan 2023-07-13 1853 b79f8eb408d046 Jiaqi Yan 2023-07-13 1854 mutex_unlock(&mf_mutex); b79f8eb408d046 Jiaqi Yan 2023-07-13 1855 b79f8eb408d046 Jiaqi Yan 2023-07-13 1856 return ret; b79f8eb408d046 Jiaqi Yan 2023-07-13 1857 } b79f8eb408d046 Jiaqi Yan 2023-07-13 1858 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki