Hi Mina, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on hnaz-mm/master] url: https://github.com/0day-ci/linux/commits/Mina-Almasry/mm-shmem-support-deterministic-charging-of-tmpfs/20211112-084506 base: https://github.com/hnaz/linux-mm master config: um-i386_defconfig (attached as .config) compiler: gcc-9 (Debian 9.3.0-22) 9.3.0 reproduce (this is a W=1 build): # https://github.com/0day-ci/linux/commit/51d8c281f9e96cc0269902e4597a972c7e2510f0 git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Mina-Almasry/mm-shmem-support-deterministic-charging-of-tmpfs/20211112-084506 git checkout 51d8c281f9e96cc0269902e4597a972c7e2510f0 # save the attached .config to linux build tree make W=1 ARCH=um SUBARCH=i386 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> All warnings (new ones prefixed by >>): fs/super.c: In function 'destroy_unused_super': >> fs/super.c:184:5: warning: "CONFIG_MEMCG" is not defined, evaluates to 0 [-Wundef] 184 | #if CONFIG_MEMCG | ^~~~~~~~~~~~ fs/super.c: In function '__put_super': fs/super.c:299:5: warning: "CONFIG_MEMCG" is not defined, evaluates to 0 [-Wundef] 299 | #if CONFIG_MEMCG | ^~~~~~~~~~~~ vim +/CONFIG_MEMCG +184 fs/super.c 175 176 /* Free a superblock that has never been seen by anyone */ 177 static void destroy_unused_super(struct super_block *s) 178 { 179 if (!s) 180 return; 181 up_write(&s->s_umount); 182 list_lru_destroy(&s->s_dentry_lru); 183 list_lru_destroy(&s->s_inode_lru); > 184 #if CONFIG_MEMCG 185 mem_cgroup_set_charge_target(&s->s_memcg_to_charge, NULL); 186 #endif 187 security_sb_free(s); 188 put_user_ns(s->s_user_ns); 189 kfree(s->s_subtype); 190 free_prealloced_shrinker(&s->s_shrink); 191 /* no delays needed */ 192 destroy_super_work(&s->destroy_work); 193 } 194 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
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