Hi Chengming, kernel test robot noticed the following build warnings: [auto build test WARNING on 0f5f12ac05f36f117e793656c3f560625e927f1b] url: https://github.com/intel-lab-lkp/linux/commits/Chengming-Zhou/mm-zswap-make-sure-each-swapfile-always-have-zswap-rb-tree/20231206-174717 base: 0f5f12ac05f36f117e793656c3f560625e927f1b patch link: https://lore.kernel.org/r/20231206-zswap-lock-optimize-v1-1-e25b059f9c3a%40bytedance.com patch subject: [PATCH 1/7] mm/zswap: make sure each swapfile always have zswap rb-tree config: i386-buildonly-randconfig-002-20231208 (https://download.01.org/0day-ci/archive/20231208/202312082309.xvC0Rdd9-lkp@xxxxxxxxx/config) compiler: clang version 16.0.4 (https://github.com/llvm/llvm-project.git ae42196bc493ffe877a7e3dff8be32035dea4d07) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20231208/202312082309.xvC0Rdd9-lkp@xxxxxxxxx/reproduce) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <lkp@xxxxxxxxx> | Closes: https://lore.kernel.org/oe-kbuild-all/202312082309.xvC0Rdd9-lkp@xxxxxxxxx/ All warnings (new ones prefixed by >>): In file included from arch/x86/kernel/asm-offsets.c:9: In file included from include/linux/crypto.h:17: In file included from include/linux/slab.h:16: In file included from include/linux/gfp.h:7: In file included from include/linux/mmzone.h:25: >> include/linux/zswap.h:53:43: warning: non-void function does not return a value [-Wreturn-type] static inline int zswap_swapon(int type) {} ^ 1 warning generated. -- In file included from arch/x86/mm/pat/set_memory.c:6: In file included from include/linux/highmem.h:5: In file included from include/linux/fs.h:13: In file included from include/linux/list_lru.h:14: In file included from include/linux/xarray.h:15: In file included from include/linux/gfp.h:7: In file included from include/linux/mmzone.h:25: >> include/linux/zswap.h:53:43: warning: non-void function does not return a value [-Wreturn-type] static inline int zswap_swapon(int type) {} ^ arch/x86/mm/pat/set_memory.c:217:1: warning: unused function 'within_inclusive' [-Wunused-function] within_inclusive(unsigned long addr, unsigned long start, unsigned long end) ^ 2 warnings generated. -- In file included from arch/x86/kernel/asm-offsets.c:9: In file included from include/linux/crypto.h:17: In file included from include/linux/slab.h:16: In file included from include/linux/gfp.h:7: In file included from include/linux/mmzone.h:25: >> include/linux/zswap.h:53:43: warning: non-void function does not return a value [-Wreturn-type] static inline int zswap_swapon(int type) {} ^ 1 warning generated. vim +53 include/linux/zswap.h 51 52 static inline void zswap_invalidate(int type, pgoff_t offset) {} > 53 static inline int zswap_swapon(int type) {} 54 static inline void zswap_swapoff(int type) {} 55 static inline void zswap_memcg_offline_cleanup(struct mem_cgroup *memcg) {} 56 static inline void zswap_lruvec_state_init(struct lruvec *lruvec) {} 57 static inline void zswap_page_swapin(struct page *page) {} 58 #endif 59 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
