linux-kernel - linux-next: build failure after merge of the mm tree

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Date:   Wed, 2 Nov 2022 14:55:32 +1100
From:   Stephen Rothwell <sfr@...b.auug.org.au>
To:     Andrew Morton <akpm@...ux-foundation.org>
Cc:     Sidhartha Kumar <sidhartha.kumar@...cle.com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Linux Next Mailing List <linux-next@...r.kernel.org>
Subject: linux-next: build failure after merge of the mm tree

Hi all,

After merging the mm tree, today's linux-next build (arm
multi_v7_defconfig) failed like this:

mm/migrate.c: In function 'unmap_and_move_huge_page':
mm/migrate.c:1315:13: error: implicit declaration of function 'hugetlb_folio_subpool'; did you mean 'hugetlb_page_subpool'? [-Werror=implicit-function-declaration]
 1315 |         if (hugetlb_folio_subpool(src) && !folio_mapping(src)) {
      |             ^~~~~~~~~~~~~~~~~~~~~
      |             hugetlb_page_subpool
cc1: some warnings being treated as errors

Caused by commit

  fa7dc4d80445 ("mm/hugetlb: convert move_hugetlb_state() to folios")

This build does *not* have CONFIG_HUGETLB_PAGE set.

I have reverted that commit for today.

-- 
Cheers,
Stephen Rothwell

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