tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master head: df964ce9ef9fea10cf131bf6bad8658fde7956f6 commit: 588d06cd90cfb015926def2469ab99f3c72a205d [8148/8790] fs-proc-task_mmu-implement-ioctl-to-get-and-optionally-clear-info-about-ptes-fix-2 config: x86_64-randconfig-005-20231001 (https://download.01.org/0day-ci/archive/20231001/202310011545.iHTT4Y7S-lkp@xxxxxxxxx/config) compiler: gcc-12 (Debian 12.2.0-14) 12.2.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20231001/202310011545.iHTT4Y7S-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/202310011545.iHTT4Y7S-lkp@xxxxxxxxx/ Note: the linux-next/master HEAD df964ce9ef9fea10cf131bf6bad8658fde7956f6 builds fine. It may have been fixed somewhere. All errors (new ones prefixed by >>): fs/proc/task_mmu.c: In function 'pagemap_scan_thp_entry': >> fs/proc/task_mmu.c:2105:17: error: implicit declaration of function 'pagemap_scan_backout_range'; did you mean 'pagemap_scan_push_range'? [-Werror=implicit-function-declaration] 2105 | 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 fef1d15288b455 Muhammad Usama Anjum 2023-08-21 2068 fef1d15288b455 Muhammad Usama Anjum 2023-08-21 2069 static int pagemap_scan_thp_entry(pmd_t *pmd, unsigned long start, fef1d15288b455 Muhammad Usama Anjum 2023-08-21 2070 unsigned long end, struct mm_walk *walk) fef1d15288b455 Muhammad Usama Anjum 2023-08-21 2071 { fef1d15288b455 Muhammad Usama Anjum 2023-08-21 2072 #ifdef CONFIG_TRANSPARENT_HUGEPAGE fef1d15288b455 Muhammad Usama Anjum 2023-08-21 2073 struct pagemap_scan_private *p = walk->private; fef1d15288b455 Muhammad Usama Anjum 2023-08-21 2074 struct vm_area_struct *vma = walk->vma; fef1d15288b455 Muhammad Usama Anjum 2023-08-21 2075 unsigned long categories; fef1d15288b455 Muhammad Usama Anjum 2023-08-21 2076 spinlock_t *ptl; fef1d15288b455 Muhammad Usama Anjum 2023-08-21 2077 int ret = 0; fef1d15288b455 Muhammad Usama Anjum 2023-08-21 2078 fef1d15288b455 Muhammad Usama Anjum 2023-08-21 2079 ptl = pmd_trans_huge_lock(pmd, vma); fef1d15288b455 Muhammad Usama Anjum 2023-08-21 2080 if (!ptl) fef1d15288b455 Muhammad Usama Anjum 2023-08-21 2081 return -ENOENT; fef1d15288b455 Muhammad Usama Anjum 2023-08-21 2082 fef1d15288b455 Muhammad Usama Anjum 2023-08-21 2083 categories = p->cur_vma_category | fef1d15288b455 Muhammad Usama Anjum 2023-08-21 2084 pagemap_thp_category(p, vma, start, *pmd); fef1d15288b455 Muhammad Usama Anjum 2023-08-21 2085 fef1d15288b455 Muhammad Usama Anjum 2023-08-21 2086 if (!pagemap_scan_is_interesting_page(categories, p)) fef1d15288b455 Muhammad Usama Anjum 2023-08-21 2087 goto out_unlock; fef1d15288b455 Muhammad Usama Anjum 2023-08-21 2088 fef1d15288b455 Muhammad Usama Anjum 2023-08-21 2089 ret = pagemap_scan_output(categories, p, start, &end); fef1d15288b455 Muhammad Usama Anjum 2023-08-21 2090 if (start == end) fef1d15288b455 Muhammad Usama Anjum 2023-08-21 2091 goto out_unlock; fef1d15288b455 Muhammad Usama Anjum 2023-08-21 2092 fef1d15288b455 Muhammad Usama Anjum 2023-08-21 2093 if (~p->arg.flags & PM_SCAN_WP_MATCHING) fef1d15288b455 Muhammad Usama Anjum 2023-08-21 2094 goto out_unlock; fef1d15288b455 Muhammad Usama Anjum 2023-08-21 2095 if (~categories & PAGE_IS_WRITTEN) fef1d15288b455 Muhammad Usama Anjum 2023-08-21 2096 goto out_unlock; fef1d15288b455 Muhammad Usama Anjum 2023-08-21 2097 fef1d15288b455 Muhammad Usama Anjum 2023-08-21 2098 /* fef1d15288b455 Muhammad Usama Anjum 2023-08-21 2099 * Break huge page into small pages if the WP operation fef1d15288b455 Muhammad Usama Anjum 2023-08-21 2100 * needs to be performed on a portion of the huge page. fef1d15288b455 Muhammad Usama Anjum 2023-08-21 2101 */ fef1d15288b455 Muhammad Usama Anjum 2023-08-21 2102 if (end != start + HPAGE_SIZE) { fef1d15288b455 Muhammad Usama Anjum 2023-08-21 2103 spin_unlock(ptl); fef1d15288b455 Muhammad Usama Anjum 2023-08-21 2104 split_huge_pmd(vma, pmd, start); fef1d15288b455 Muhammad Usama Anjum 2023-08-21 @2105 pagemap_scan_backout_range(p, start, end); fef1d15288b455 Muhammad Usama Anjum 2023-08-21 2106 /* Report as if there was no THP */ fef1d15288b455 Muhammad Usama Anjum 2023-08-21 2107 return -ENOENT; fef1d15288b455 Muhammad Usama Anjum 2023-08-21 2108 } fef1d15288b455 Muhammad Usama Anjum 2023-08-21 2109 fef1d15288b455 Muhammad Usama Anjum 2023-08-21 2110 make_uffd_wp_pmd(vma, start, pmd); fef1d15288b455 Muhammad Usama Anjum 2023-08-21 2111 flush_tlb_range(vma, start, end); fef1d15288b455 Muhammad Usama Anjum 2023-08-21 2112 out_unlock: fef1d15288b455 Muhammad Usama Anjum 2023-08-21 2113 spin_unlock(ptl); fef1d15288b455 Muhammad Usama Anjum 2023-08-21 2114 return ret; fef1d15288b455 Muhammad Usama Anjum 2023-08-21 2115 #else /* !CONFIG_TRANSPARENT_HUGEPAGE */ fef1d15288b455 Muhammad Usama Anjum 2023-08-21 2116 return -ENOENT; fef1d15288b455 Muhammad Usama Anjum 2023-08-21 2117 #endif fef1d15288b455 Muhammad Usama Anjum 2023-08-21 2118 } fef1d15288b455 Muhammad Usama Anjum 2023-08-21 2119 :::::: The code at line 2105 was first introduced by commit :::::: fef1d15288b455d957cdee6ebf8118b525872bde 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
