Hi Li, kernel test robot noticed the following build warnings: [auto build test WARNING on v6.5-rc5] [also build test WARNING on linus/master next-20230809] [cannot apply to tj-cgroup/for-next] [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/Li-kunyu/cgroup-cgroup-Remove-unnecessary-0-values-from-ret/20230811-171814 base: v6.5-rc5 patch link: https://lore.kernel.org/r/20230813014734.2916-1-kunyu%40nfschina.com patch subject: [PATCH] cgroup: cgroup: Remove unnecessary ‘0’ values from ret config: x86_64-randconfig-r035-20230811 (https://download.01.org/0day-ci/archive/20230811/202308112139.lVjuXYZg-lkp@xxxxxxxxx/config) compiler: clang version 16.0.4 (https://github.com/llvm/llvm-project.git ae42196bc493ffe877a7e3dff8be32035dea4d07) reproduce: (https://download.01.org/0day-ci/archive/20230811/202308112139.lVjuXYZg-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/202308112139.lVjuXYZg-lkp@xxxxxxxxx/ All warnings (new ones prefixed by >>): >> kernel/cgroup/cgroup.c:7000:56: warning: variable 'ret' is uninitialized when used here [-Wuninitialized] ret = show_delegatable_files(cgroup_base_files, buf + ret, ^~~ kernel/cgroup/cgroup.c:6998:13: note: initialize the variable 'ret' to silence this warning ssize_t ret; ^ = 0 1 warning generated. vim +/ret +7000 kernel/cgroup/cgroup.c 01ee6cfb1483fe Roman Gushchin 2017-11-06 6992 01ee6cfb1483fe Roman Gushchin 2017-11-06 6993 static ssize_t delegate_show(struct kobject *kobj, struct kobj_attribute *attr, 01ee6cfb1483fe Roman Gushchin 2017-11-06 6994 char *buf) 01ee6cfb1483fe Roman Gushchin 2017-11-06 6995 { 01ee6cfb1483fe Roman Gushchin 2017-11-06 6996 struct cgroup_subsys *ss; 01ee6cfb1483fe Roman Gushchin 2017-11-06 6997 int ssid; 3d7f13682faf54 Li kunyu 2023-08-13 6998 ssize_t ret; 01ee6cfb1483fe Roman Gushchin 2017-11-06 6999 8a693f7766f9e2 Tejun Heo 2022-09-06 @7000 ret = show_delegatable_files(cgroup_base_files, buf + ret, 8a693f7766f9e2 Tejun Heo 2022-09-06 7001 PAGE_SIZE - ret, NULL); 8a693f7766f9e2 Tejun Heo 2022-09-06 7002 if (cgroup_psi_enabled()) 8a693f7766f9e2 Tejun Heo 2022-09-06 7003 ret += show_delegatable_files(cgroup_psi_files, buf + ret, 8a693f7766f9e2 Tejun Heo 2022-09-06 7004 PAGE_SIZE - ret, NULL); 01ee6cfb1483fe Roman Gushchin 2017-11-06 7005 01ee6cfb1483fe Roman Gushchin 2017-11-06 7006 for_each_subsys(ss, ssid) 01ee6cfb1483fe Roman Gushchin 2017-11-06 7007 ret += show_delegatable_files(ss->dfl_cftypes, buf + ret, 01ee6cfb1483fe Roman Gushchin 2017-11-06 7008 PAGE_SIZE - ret, 01ee6cfb1483fe Roman Gushchin 2017-11-06 7009 cgroup_subsys_name[ssid]); 01ee6cfb1483fe Roman Gushchin 2017-11-06 7010 01ee6cfb1483fe Roman Gushchin 2017-11-06 7011 return ret; 01ee6cfb1483fe Roman Gushchin 2017-11-06 7012 } 01ee6cfb1483fe Roman Gushchin 2017-11-06 7013 static struct kobj_attribute cgroup_delegate_attr = __ATTR_RO(delegate); 01ee6cfb1483fe Roman Gushchin 2017-11-06 7014 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
