Hi Joe, kernel test robot noticed the following build warnings: [auto build test WARNING on net-next/main] url: https://github.com/intel-lab-lkp/linux/commits/Joe-Damato/eventpoll-support-busy-poll-per-epoll-instance/20240125-083418 base: net-next/main patch link: https://lore.kernel.org/r/20240125003014.43103-4-jdamato%40fastly.com patch subject: [net-next v2 3/4] eventpoll: Add epoll ioctl for epoll_params config: openrisc-allnoconfig (https://download.01.org/0day-ci/archive/20240125/202401252141.eUlgsF08-lkp@xxxxxxxxx/config) compiler: or1k-linux-gcc (GCC) 13.2.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240125/202401252141.eUlgsF08-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/202401252141.eUlgsF08-lkp@xxxxxxxxx/ All warnings (new ones prefixed by >>): fs/eventpoll.c: In function 'ep_eventpoll_ioctl': >> fs/eventpoll.c:879:22: warning: unused variable 'uarg' [-Wunused-variable] 879 | void __user *uarg = (void __user *) arg; | ^~~~ >> fs/eventpoll.c:878:29: warning: unused variable 'epoll_params' [-Wunused-variable] 878 | struct epoll_params epoll_params; | ^~~~~~~~~~~~ fs/eventpoll.c:877:27: warning: variable 'ep' set but not used [-Wunused-but-set-variable] 877 | struct eventpoll *ep; | ^~ vim +/uarg +879 fs/eventpoll.c 873 874 static long ep_eventpoll_ioctl(struct file *file, unsigned int cmd, unsigned long arg) 875 { 876 int ret; 877 struct eventpoll *ep; > 878 struct epoll_params epoll_params; > 879 void __user *uarg = (void __user *) arg; 880 881 if (!is_file_epoll(file)) 882 return -EINVAL; 883 884 ep = file->private_data; 885 886 switch (cmd) { 887 #ifdef CONFIG_NET_RX_BUSY_POLL 888 case EPIOCSPARAMS: 889 if (copy_from_user(&epoll_params, uarg, sizeof(epoll_params))) 890 return -EFAULT; 891 892 if (epoll_params.busy_poll_budget > NAPI_POLL_WEIGHT) 893 pr_err("busy poll budget %u exceeds suggested maximum %u\n", 894 epoll_params.busy_poll_budget, NAPI_POLL_WEIGHT); 895 896 ep->busy_poll_usecs = epoll_params.busy_poll_usecs; 897 ep->busy_poll_budget = epoll_params.busy_poll_budget; 898 return 0; 899 900 case EPIOCGPARAMS: 901 memset(&epoll_params, 0, sizeof(epoll_params)); 902 epoll_params.busy_poll_usecs = ep->busy_poll_usecs; 903 epoll_params.busy_poll_budget = ep->busy_poll_budget; 904 if (copy_to_user(uarg, &epoll_params, sizeof(epoll_params))) 905 return -EFAULT; 906 907 return 0; 908 #endif 909 default: 910 ret = -EINVAL; 911 break; 912 } 913 914 return ret; 915 } 916 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
