linux-kernel - [akpm-mm:mm-unstable 154/159] mm/memory-failure.c:1538:9: error: implicit declaration of function 'hugetlb_set_page

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Date:   Fri, 3 Jun 2022 08:27:50 +0800
From:   kernel test robot <lkp@...el.com>
To:     Naoya Horiguchi <naoya.horiguchi@....com>
Cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org,
        Andrew Morton <akpm@...ux-foundation.org>,
        Linux Memory Management List <linux-mm@...ck.org>
Subject: [akpm-mm:mm-unstable 154/159] mm/memory-failure.c:1538:9: error:
 implicit declaration of function 'hugetlb_set_page_hwpoison'

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-unstable
head:   1bdf44dbc966e31c635199d413ee064a7d320844
commit: d4edf38ab95397f32ae017848deeeb3b6d2c5bb7 [154/159] mm, hwpoison, hugetlb: introduce SUBPAGE_INDEX_HWPOISON to save raw error page
config: x86_64-kexec (https://download.01.org/0day-ci/archive/20220603/202206030829.0eS2kZa0-lkp@intel.com/config)
compiler: gcc-11 (Debian 11.3.0-1) 11.3.0
reproduce (this is a W=1 build):
        # https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git/commit/?id=d4edf38ab95397f32ae017848deeeb3b6d2c5bb7
        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 d4edf38ab95397f32ae017848deeeb3b6d2c5bb7
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        make W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash

If you fix the issue, kindly add following tag where applicable
Reported-by: kernel test robot <lkp@...el.com>

All errors (new ones prefixed by >>):

   mm/memory-failure.c: In function '__get_huge_page_for_hwpoison':
>> mm/memory-failure.c:1538:9: error: implicit declaration of function 'hugetlb_set_page_hwpoison' [-Werror=implicit-function-declaration]
    1538 |         hugetlb_set_page_hwpoison(head, page);
         |         ^~~~~~~~~~~~~~~~~~~~~~~~~
   cc1: some warnings being treated as errors


vim +/hugetlb_set_page_hwpoison +1538 mm/memory-failure.c

  1498	
  1499	/*
  1500	 * Called from hugetlb code with hugetlb_lock held.
  1501	 *
  1502	 * Return values:
  1503	 *   0             - free hugepage
  1504	 *   1             - in-use hugepage
  1505	 *   2             - not a hugepage
  1506	 *   -EBUSY        - the hugepage is busy (try to retry)
  1507	 *   -EHWPOISON    - the hugepage is already hwpoisoned
  1508	 */
  1509	int __get_huge_page_for_hwpoison(unsigned long pfn, int flags)
  1510	{
  1511		struct page *page = pfn_to_page(pfn);
  1512		struct page *head = compound_head(page);
  1513		int ret = 2;	/* fallback to normal page handling */
  1514		bool count_increased = false;
  1515	
  1516		if (!PageHeadHuge(head))
  1517			goto out;
  1518	
  1519		if (flags & MF_COUNT_INCREASED) {
  1520			ret = 1;
  1521			count_increased = true;
  1522		} else if (HPageFreed(head)) {
  1523			ret = 0;
  1524		} else if (HPageMigratable(head)) {
  1525			ret = get_page_unless_zero(head);
  1526			if (ret)
  1527				count_increased = true;
  1528		} else {
  1529			ret = -EBUSY;
  1530			goto out;
  1531		}
  1532	
  1533		if (TestSetPageHWPoison(head)) {
  1534			ret = -EHWPOISON;
  1535			goto out;
  1536		}
  1537	
> 1538		hugetlb_set_page_hwpoison(head, page);
  1539	
  1540		return ret;
  1541	out:
  1542		if (count_increased)
  1543			put_page(head);
  1544		return ret;
  1545	}
  1546	

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