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