Hi Michael, FYI, the error/warning was bisected to this commit, please ignore it if it's irrelevant.
tree: https://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost.git balloon head: b145636d693114d343a0a47a4400f5b31e211fec commit: c4af912c65bc897b31264a3403f18b0cf52fa10c [12/38] mm: use folio_zero_user for user pages in post_alloc_hook config: m68k-allnoconfig (https://download.01.org/0day-ci/archive/20260605/[email protected]/config) compiler: m68k-linux-gcc (GCC) 15.2.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260605/[email protected]/reproduce) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <[email protected]> | Closes: https://lore.kernel.org/oe-kbuild-all/[email protected]/ All errors (new ones prefixed by >>): m68k-linux-ld: mm/page_alloc.o: in function `post_alloc_hook': >> page_alloc.c:(.text+0x3b42): undefined reference to `folio_zero_user' m68k-linux-ld: mm/page_alloc.o: in function `get_page_from_freelist': page_alloc.c:(.text+0x546a): undefined reference to `folio_zero_user' >> m68k-linux-ld: page_alloc.c:(.text+0x550c): undefined reference to >> `folio_zero_user' -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
