Hello, syzbot tried to test the proposed patch but the build/boot failed: mm/list_lru.c:88:14: error: implicit declaration of function 'memcg_kmem_id' [-Werror=implicit-function-declaration] Tested on: commit: 5abc1e37 mm: list_lru: allocate list_lru_one only when.. git tree: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git dashboard link: https://syzkaller.appspot.com/bug?extid=f8c45ccc7d5d45fc5965 compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 patch: https://syzkaller.appspot.com/x/patch.diff?x=12e2d063700000
