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Message-ID: <202205110431.fazG1wsY-lkp@intel.com>
Date: Wed, 11 May 2022 04:54:09 +0800
From: kernel test robot <lkp@...el.com>
To: Miaohe Lin <linmiaohe@...wei.com>
Cc: llvm@...ts.linux.dev, kbuild-all@...ts.01.org,
linux-kernel@...r.kernel.org,
Andrew Morton <akpm@...ux-foundation.org>,
Linux Memory Management List <linux-mm@...ck.org>,
Naoya Horiguchi <naoya.horiguchi@....com>
Subject: [akpm-mm:mm-unstable 175/431] mm/madvise.c:632:8: error: call to
undeclared function 'is_swapin_error_entry'; ISO C99 and later do not
support implicit function declarations
tree: https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-unstable
head: 584a50635cc1deee2eeab5a17dfdcf9db7add21b
commit: 8296b60c4ec05505344455818a30cb2774304acd [175/431] mm/madvise: free hwpoison and swapin error entry in madvise_free_pte_range
config: arm-randconfig-r015-20220509 (https://download.01.org/0day-ci/archive/20220511/202205110431.fazG1wsY-lkp@intel.com/config)
compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project 18dd123c56754edf62c7042dcf23185c3727610f)
reproduce (this is a W=1 build):
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# install arm cross compiling tool for clang build
# apt-get install binutils-arm-linux-gnueabi
# https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git/commit/?id=8296b60c4ec05505344455818a30cb2774304acd
git remote add akpm-mm https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git
git fetch --no-tags akpm-mm mm-unstable
git checkout 8296b60c4ec05505344455818a30cb2774304acd
# save the config file
mkdir build_dir && cp config build_dir/.config
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=arm SHELL=/bin/bash
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@...el.com>
Note: the akpm-mm/mm-unstable HEAD 584a50635cc1deee2eeab5a17dfdcf9db7add21b builds fine.
It only hurts bisectability.
All errors (new ones prefixed by >>):
>> mm/madvise.c:632:8: error: call to undeclared function 'is_swapin_error_entry'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
is_swapin_error_entry(entry)) {
^
1 error generated.
vim +/is_swapin_error_entry +632 mm/madvise.c
587
588 static int madvise_free_pte_range(pmd_t *pmd, unsigned long addr,
589 unsigned long end, struct mm_walk *walk)
590
591 {
592 struct mmu_gather *tlb = walk->private;
593 struct mm_struct *mm = tlb->mm;
594 struct vm_area_struct *vma = walk->vma;
595 spinlock_t *ptl;
596 pte_t *orig_pte, *pte, ptent;
597 struct page *page;
598 int nr_swap = 0;
599 unsigned long next;
600
601 next = pmd_addr_end(addr, end);
602 if (pmd_trans_huge(*pmd))
603 if (madvise_free_huge_pmd(tlb, vma, pmd, addr, next))
604 goto next;
605
606 if (pmd_trans_unstable(pmd))
607 return 0;
608
609 tlb_change_page_size(tlb, PAGE_SIZE);
610 orig_pte = pte = pte_offset_map_lock(mm, pmd, addr, &ptl);
611 flush_tlb_batched_pending(mm);
612 arch_enter_lazy_mmu_mode();
613 for (; addr != end; pte++, addr += PAGE_SIZE) {
614 ptent = *pte;
615
616 if (pte_none(ptent))
617 continue;
618 /*
619 * If the pte has swp_entry, just clear page table to
620 * prevent swap-in which is more expensive rather than
621 * (page allocation + zeroing).
622 */
623 if (!pte_present(ptent)) {
624 swp_entry_t entry;
625
626 entry = pte_to_swp_entry(ptent);
627 if (!non_swap_entry(entry)) {
628 nr_swap--;
629 free_swap_and_cache(entry);
630 pte_clear_not_present_full(mm, addr, pte, tlb->fullmm);
631 } else if (is_hwpoison_entry(entry) ||
> 632 is_swapin_error_entry(entry)) {
633 pte_clear_not_present_full(mm, addr, pte, tlb->fullmm);
634 }
635 continue;
636 }
637
638 page = vm_normal_page(vma, addr, ptent);
639 if (!page)
640 continue;
641
642 /*
643 * If pmd isn't transhuge but the page is THP and
644 * is owned by only this process, split it and
645 * deactivate all pages.
646 */
647 if (PageTransCompound(page)) {
648 if (page_mapcount(page) != 1)
649 goto out;
650 get_page(page);
651 if (!trylock_page(page)) {
652 put_page(page);
653 goto out;
654 }
655 pte_unmap_unlock(orig_pte, ptl);
656 if (split_huge_page(page)) {
657 unlock_page(page);
658 put_page(page);
659 orig_pte = pte_offset_map_lock(mm, pmd, addr, &ptl);
660 goto out;
661 }
662 unlock_page(page);
663 put_page(page);
664 orig_pte = pte = pte_offset_map_lock(mm, pmd, addr, &ptl);
665 pte--;
666 addr -= PAGE_SIZE;
667 continue;
668 }
669
670 VM_BUG_ON_PAGE(PageTransCompound(page), page);
671
672 if (PageSwapCache(page) || PageDirty(page)) {
673 if (!trylock_page(page))
674 continue;
675 /*
676 * If page is shared with others, we couldn't clear
677 * PG_dirty of the page.
678 */
679 if (page_mapcount(page) != 1) {
680 unlock_page(page);
681 continue;
682 }
683
684 if (PageSwapCache(page) && !try_to_free_swap(page)) {
685 unlock_page(page);
686 continue;
687 }
688
689 ClearPageDirty(page);
690 unlock_page(page);
691 }
692
693 if (pte_young(ptent) || pte_dirty(ptent)) {
694 /*
695 * Some of architecture(ex, PPC) don't update TLB
696 * with set_pte_at and tlb_remove_tlb_entry so for
697 * the portability, remap the pte with old|clean
698 * after pte clearing.
699 */
700 ptent = ptep_get_and_clear_full(mm, addr, pte,
701 tlb->fullmm);
702
703 ptent = pte_mkold(ptent);
704 ptent = pte_mkclean(ptent);
705 set_pte_at(mm, addr, pte, ptent);
706 tlb_remove_tlb_entry(tlb, pte, addr);
707 }
708 mark_page_lazyfree(page);
709 }
710 out:
711 if (nr_swap) {
712 if (current->mm == mm)
713 sync_mm_rss(mm);
714
715 add_mm_counter(mm, MM_SWAPENTS, nr_swap);
716 }
717 arch_leave_lazy_mmu_mode();
718 pte_unmap_unlock(orig_pte, ptl);
719 cond_resched();
720 next:
721 return 0;
722 }
723
--
0-DAY CI Kernel Test Service
https://01.org/lkp
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