Hi zhenwei, kernel test robot noticed the following build warnings: [auto build test WARNING on akpm-mm/mm-everything] [also build test WARNING on linus/master v6.9-rc4 next-20240419] [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#_base_tree_information] url: https://github.com/intel-lab-lkp/linux/commits/zhenwei-pi/virtio_balloon-introduce-oom-kill-invocations/20240418-142934 base: https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-everything patch link: https://lore.kernel.org/r/20240418062602.1291391-3-pizhenwei%40bytedance.com patch subject: [PATCH 2/3] virtio_balloon: introduce memory allocation stall counter config: i386-randconfig-141-20240421 (https://download.01.org/0day-ci/archive/20240421/202404211106.B9pwuFqk-lkp@xxxxxxxxx/config) compiler: clang version 17.0.6 (https://github.com/llvm/llvm-project 6009708b4367171ccdbf4b5905cb6a803753fe18) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240421/202404211106.B9pwuFqk-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/202404211106.B9pwuFqk-lkp@xxxxxxxxx/ All warnings (new ones prefixed by >>): >> drivers/virtio/virtio_balloon.c:324:18: warning: unused variable 'stall' [-Wunused-variable] 324 | long available, stall = 0; | ^~~~~ 1 warning generated. vim +/stall +324 drivers/virtio/virtio_balloon.c 318 319 static unsigned int update_balloon_stats(struct virtio_balloon *vb) 320 { 321 unsigned long events[NR_VM_EVENT_ITEMS]; 322 struct sysinfo i; 323 unsigned int idx = 0; > 324 long available, stall = 0; 325 unsigned long caches; 326 327 all_vm_events(events); 328 si_meminfo(&i); 329 330 available = si_mem_available(); 331 caches = global_node_page_state(NR_FILE_PAGES); 332 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
