I am getting the following for nommu with MEMCG=y randconfig: kernel/fork.o: In function `mm_init': fork.c:(.text+0x948): undefined reference to `mm_update_memcg' kernel/fork.o: In function `mmput': fork.c:(.text+0x119c): undefined reference to `mm_update_memcg' make: *** [vmlinux] Error 1
I am sorry but I didn't get to look at it much more but I suspect you just have to move mm_update_memcg up before mem_cgroup_do_precharge. -- Michal Hocko SUSE Labs
