Hi Arunpravin, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on 5313fb2c779f74bc5083e9d3738d9b2c2ebe0aa4] url: https://github.com/0day-ci/linux/commits/Arunpravin/drm-move-the-buddy-al... base: 5313fb2c779f74bc5083e9d3738d9b2c2ebe0aa4 config: x86_64-randconfig-a001-20220109 (https://download.01.org/0day-ci/archive/20220110/202201101702.AU8z1yRz-lk...) 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/47666a7da23e2e1df69515f179902dda6... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Arunpravin/drm-move-the-buddy-allocator-from-i915-into-common-drm/20220109-222233 git checkout 47666a7da23e2e1df69515f179902dda6fcf5c43 # save the config file to linux build tree mkdir build_dir make W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash drivers/gpu/drm/ If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>): 517 | void drm_buddy_module_exit(void) | ^~~~~~~~~~~~~~~~~~~~~ 522 | int __init drm_buddy_module_init(void) | ^~~~~~~~~~~~~~~~~~~~~ vim +/drm_buddy_module_exit +517 drivers/gpu/drm/drm_buddy.c 516 518 { 519 kmem_cache_destroy(slab_blocks); 520 } 521 523 { 524 slab_blocks = KMEM_CACHE(drm_buddy_block, 0); 525 if (!slab_blocks) 526 return -ENOMEM; 527 528 return 0; 529 } 530 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org