Hi Faiyaz, Thank you for the patch! Yet something to improve: [auto build test ERROR on linus/master] [also build test ERROR on v5.12] [cannot apply to hnaz-linux-mm/master next-20210506] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch] url: https://github.com/0day-ci/linux/commits/Faiyaz-Mohammed/mm-slub-move-sysfs-slab-alloc-free-interfaces-to-debugfs/20210506-182420 base: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 8404c9fbc84b741f66cff7d4934a25dd2c344452 config: ia64-randconfig-r015-20210506 (attached as .config) compiler: ia64-linux-gcc (GCC) 9.3.0 reproduce (this is a W=1 build): wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # https://github.com/0day-ci/linux/commit/88e180b99466c1298b9454c7cf40d571cc92b7cc git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Faiyaz-Mohammed/mm-slub-move-sysfs-slab-alloc-free-interfaces-to-debugfs/20210506-182420 git checkout 88e180b99466c1298b9454c7cf40d571cc92b7cc # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross W=1 ARCH=ia64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot All errors (new ones prefixed by >>): ia64-linux-ld: mm/slab_common.o: in function `slab_caches_to_rcu_destroy_workfn': >> slab_common.c:(.text+0x172): undefined reference to `debugfs_slab_release' ia64-linux-ld: mm/slab_common.o: in function `kmem_cache_destroy': slab_common.c:(.text+0xec2): undefined reference to `debugfs_slab_release' >> ia64-linux-ld: slab_common.c:(.text+0xf82): undefined reference to `debugfs_slab_release' ia64-linux-ld: mm/slub.o: in function `__kmem_cache_alias': >> slub.c:(.text+0x8a42): undefined reference to `debugfs_slab_alias' ia64-linux-ld: mm/slub.o: in function `__kmem_cache_create': >> slub.c:(.text+0x9a82): undefined reference to `debugfs_slab_add' --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org