tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master head: 18030226a48de1fbfabf4ae16aaa2695a484254f commit: 9ce57107e2c4448860ac500e6080f576fabc7081 [8126/8345] fs-proc-task_mmu-implement-ioctl-to-get-and-optionally-clear-info-about-ptes-fix-2 config: i386-randconfig-003-20230927 (https://download.01.org/0day-ci/archive/20230927/202309271719.sXq960r2-lkp@xxxxxxxxx/config) compiler: gcc-7 (Ubuntu 7.5.0-6ubuntu2) 7.5.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20230927/202309271719.sXq960r2-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/202309271719.sXq960r2-lkp@xxxxxxxxx/ All errors (new ones prefixed by >>): fs/proc/task_mmu.c: In function 'pagemap_scan_thp_entry': >> fs/proc/task_mmu.c:2105:3: error: implicit declaration of function 'pagemap_scan_backout_range'; did you mean 'pagemap_scan_push_range'? [-Werror=implicit-function-declaration] pagemap_scan_backout_range(p, start, end); ^~~~~~~~~~~~~~~~~~~~~~~~~~ pagemap_scan_push_range cc1: some warnings being treated as errors vim +2105 fs/proc/task_mmu.c 3fa00ae945d61a Muhammad Usama Anjum 2023-08-21 2068 3fa00ae945d61a Muhammad Usama Anjum 2023-08-21 2069 static int pagemap_scan_thp_entry(pmd_t *pmd, unsigned long start, 3fa00ae945d61a Muhammad Usama Anjum 2023-08-21 2070 unsigned long end, struct mm_walk *walk) 3fa00ae945d61a Muhammad Usama Anjum 2023-08-21 2071 { 3fa00ae945d61a Muhammad Usama Anjum 2023-08-21 2072 #ifdef CONFIG_TRANSPARENT_HUGEPAGE 3fa00ae945d61a Muhammad Usama Anjum 2023-08-21 2073 struct pagemap_scan_private *p = walk->private; 3fa00ae945d61a Muhammad Usama Anjum 2023-08-21 2074 struct vm_area_struct *vma = walk->vma; 3fa00ae945d61a Muhammad Usama Anjum 2023-08-21 2075 unsigned long categories; 3fa00ae945d61a Muhammad Usama Anjum 2023-08-21 2076 spinlock_t *ptl; 3fa00ae945d61a Muhammad Usama Anjum 2023-08-21 2077 int ret = 0; 3fa00ae945d61a Muhammad Usama Anjum 2023-08-21 2078 3fa00ae945d61a Muhammad Usama Anjum 2023-08-21 2079 ptl = pmd_trans_huge_lock(pmd, vma); 3fa00ae945d61a Muhammad Usama Anjum 2023-08-21 2080 if (!ptl) 3fa00ae945d61a Muhammad Usama Anjum 2023-08-21 2081 return -ENOENT; 3fa00ae945d61a Muhammad Usama Anjum 2023-08-21 2082 3fa00ae945d61a Muhammad Usama Anjum 2023-08-21 2083 categories = p->cur_vma_category | 3fa00ae945d61a Muhammad Usama Anjum 2023-08-21 2084 pagemap_thp_category(p, vma, start, *pmd); 3fa00ae945d61a Muhammad Usama Anjum 2023-08-21 2085 3fa00ae945d61a Muhammad Usama Anjum 2023-08-21 2086 if (!pagemap_scan_is_interesting_page(categories, p)) 3fa00ae945d61a Muhammad Usama Anjum 2023-08-21 2087 goto out_unlock; 3fa00ae945d61a Muhammad Usama Anjum 2023-08-21 2088 3fa00ae945d61a Muhammad Usama Anjum 2023-08-21 2089 ret = pagemap_scan_output(categories, p, start, &end); 3fa00ae945d61a Muhammad Usama Anjum 2023-08-21 2090 if (start == end) 3fa00ae945d61a Muhammad Usama Anjum 2023-08-21 2091 goto out_unlock; 3fa00ae945d61a Muhammad Usama Anjum 2023-08-21 2092 3fa00ae945d61a Muhammad Usama Anjum 2023-08-21 2093 if (~p->arg.flags & PM_SCAN_WP_MATCHING) 3fa00ae945d61a Muhammad Usama Anjum 2023-08-21 2094 goto out_unlock; 3fa00ae945d61a Muhammad Usama Anjum 2023-08-21 2095 if (~categories & PAGE_IS_WRITTEN) 3fa00ae945d61a Muhammad Usama Anjum 2023-08-21 2096 goto out_unlock; 3fa00ae945d61a Muhammad Usama Anjum 2023-08-21 2097 3fa00ae945d61a Muhammad Usama Anjum 2023-08-21 2098 /* 3fa00ae945d61a Muhammad Usama Anjum 2023-08-21 2099 * Break huge page into small pages if the WP operation 3fa00ae945d61a Muhammad Usama Anjum 2023-08-21 2100 * needs to be performed on a portion of the huge page. 3fa00ae945d61a Muhammad Usama Anjum 2023-08-21 2101 */ 3fa00ae945d61a Muhammad Usama Anjum 2023-08-21 2102 if (end != start + HPAGE_SIZE) { 3fa00ae945d61a Muhammad Usama Anjum 2023-08-21 2103 spin_unlock(ptl); 3fa00ae945d61a Muhammad Usama Anjum 2023-08-21 2104 split_huge_pmd(vma, pmd, start); 3fa00ae945d61a Muhammad Usama Anjum 2023-08-21 @2105 pagemap_scan_backout_range(p, start, end); 3fa00ae945d61a Muhammad Usama Anjum 2023-08-21 2106 /* Report as if there was no THP */ 3fa00ae945d61a Muhammad Usama Anjum 2023-08-21 2107 return -ENOENT; 3fa00ae945d61a Muhammad Usama Anjum 2023-08-21 2108 } 3fa00ae945d61a Muhammad Usama Anjum 2023-08-21 2109 3fa00ae945d61a Muhammad Usama Anjum 2023-08-21 2110 make_uffd_wp_pmd(vma, start, pmd); 3fa00ae945d61a Muhammad Usama Anjum 2023-08-21 2111 flush_tlb_range(vma, start, end); 3fa00ae945d61a Muhammad Usama Anjum 2023-08-21 2112 out_unlock: 3fa00ae945d61a Muhammad Usama Anjum 2023-08-21 2113 spin_unlock(ptl); 3fa00ae945d61a Muhammad Usama Anjum 2023-08-21 2114 return ret; 3fa00ae945d61a Muhammad Usama Anjum 2023-08-21 2115 #else /* !CONFIG_TRANSPARENT_HUGEPAGE */ 3fa00ae945d61a Muhammad Usama Anjum 2023-08-21 2116 return -ENOENT; 3fa00ae945d61a Muhammad Usama Anjum 2023-08-21 2117 #endif 3fa00ae945d61a Muhammad Usama Anjum 2023-08-21 2118 } 3fa00ae945d61a Muhammad Usama Anjum 2023-08-21 2119 :::::: The code at line 2105 was first introduced by commit :::::: 3fa00ae945d61a07a53f7609dc86e7c832d7c535 fs/proc/task_mmu: implement IOCTL to get and optionally clear info about PTEs :::::: TO: Muhammad Usama Anjum <usama.anjum@xxxxxxxxxxxxx> :::::: CC: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
