Hi Ren, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on akpm-mm/mm-everything] url: https://github.com/intel-lab-lkp/linux/commits/Ren-Yu/mm-check-the-function-kmalloc_slab-return-value/20220613-182849 base: https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-everything config: um-i386_defconfig (https://download.01.org/0day-ci/archive/20220613/202206132134.VtqdhH9v-lkp@xxxxxxxxx/config) compiler: gcc-11 (Debian 11.3.0-3) 11.3.0 reproduce (this is a W=1 build): # https://github.com/intel-lab-lkp/linux/commit/5ba2024be9e85177c986e9078e903798cac72f74 git remote add linux-review https://github.com/intel-lab-lkp/linux git fetch --no-tags linux-review Ren-Yu/mm-check-the-function-kmalloc_slab-return-value/20220613-182849 git checkout 5ba2024be9e85177c986e9078e903798cac72f74 # save the config file mkdir build_dir && cp config build_dir/.config make W=1 O=build_dir ARCH=um SUBARCH=i386 SHELL=/bin/bash If you fix the issue, kindly add following tag where applicable Reported-by: kernel test robot <lkp@xxxxxxxxx> All warnings (new ones prefixed by >>): mm/slab.c: In function '__kmem_cache_create': >> mm/slab.c:2068:38: warning: returning 'struct kmem_cache *' from a function with return type 'int' makes integer from pointer without a cast [-Wint-conversion] 2068 | return cachep->freelist_cache; | ~~~~~~^~~~~~~~~~~~~~~~ vim +2068 mm/slab.c 2063 2064 if (OFF_SLAB(cachep)) { 2065 cachep->freelist_cache = 2066 kmalloc_slab(cachep->freelist_size, 0u); 2067 if (unlikely(ZERO_OR_NULL_PTR(cachep->freelist_cache))) > 2068 return cachep->freelist_cache; 2069 } 2070 2071 err = setup_cpu_cache(cachep, gfp); 2072 if (err) { 2073 __kmem_cache_release(cachep); 2074 return err; 2075 } 2076 2077 return 0; 2078 } 2079 -- 0-DAY CI Kernel Test Service https://01.org/lkp
