Subject: linux-next: build failure after merge of the akpm-current tree

From: Stephen Rothwell <[email-masked]>
Date: Fri, 21 May 2021 15:53:59 +1000

Hi all,

After merging the akpm-current 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:1295:6: error: implicit declaration of function 'hugetlb_page_subpool' [-Werror=implicit-function-declaration]
 1295 |  if (hugetlb_page_subpool(hpage) && !page_mapping(hpage)) {
      |      ^~~~~~~~~~~~~~~~~~~~

Caused by commit

  b63794a67ae2 ("mm: migrate: fix missing update page_private to hugetlb_page_subpool")

CONFIG_HUGETLB_PAGE is not defined for this build.

I have reverted that commit for today.

-- 
Cheers,
Stephen Rothwell