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