tree: https://git.kernel.org/pub/scm/linux/kernel/git/arnd/playground.git arm-kill-set_fs-6 head: 2f6df142351693125bcb0a58d7986d3756f6723d commit: 9ae4fdf85acf0b112239c841b7027c52f4c9f544 [22/41] dev_ioctl: split out SIOC?IFMAP ioctls config: sh-rsk7264_defconfig (attached as .config) compiler: sh4-linux-gcc (GCC) 9.3.0 reproduce (this is a W=1 build): wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross git checkout 9ae4fdf85acf0b112239c841b7027c52f4c9f544 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=sh If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): cc1: warning: arch/sh/include/mach-rsk: No such file or directory [-Wmissing-include-dirs] cc1: warning: arch/sh/include/mach-rsk: No such file or directory [-Wmissing-include-dirs] net/core/dev_ioctl.c: In function 'dev_ifmap': 106 | struct compat_ifmap cifmap; | ^~~~~~ net/core/dev_ioctl.c:106:22: warning: unused variable 'cifmap' [-Wunused-variable] # https://git.kernel.org/pub/scm/linux/kernel/git/arnd/playground.git/commi... git remote add arnd-playground https://git.kernel.org/pub/scm/linux/kernel/git/arnd/playground.git git fetch --no-tags arnd-playground arm-kill-set_fs-6 git checkout 9ae4fdf85acf0b112239c841b7027c52f4c9f544 vim +106 net/core/dev_ioctl.c 100 101 int dev_ifmap(struct net *net, struct ifreq __user *ifr, unsigned int cmd) 102 { 103 struct net_device *dev; 104 char ifname[IFNAMSIZ]; 105 char *colon; 107 struct ifmap ifmap; 108 int ret; 109 110 if (copy_from_user(ifname, ifr->ifr_name, sizeof(ifname))) 111 return -EFAULT; 112 ifname[IFNAMSIZ-1] = 0; 113 colon = strchr(ifname, ':'); 114 if (colon) 115 *colon = 0; 116 dev_load(net, ifname); 117 118 switch (cmd) { 119 case SIOCGIFMAP: 120 rcu_read_lock(); 121 dev = dev_get_by_name_rcu(net, ifname); 122 if (!dev) { 123 rcu_read_unlock(); 124 return -ENODEV; 125 } 126 127 if (in_compat_syscall()) { 128 cifmap.mem_start = dev->mem_start; 129 cifmap.mem_end = dev->mem_end; 130 cifmap.base_addr = dev->base_addr; 131 cifmap.irq = dev->irq; 132 cifmap.dma = dev->dma; 133 cifmap.port = dev->if_port; 134 rcu_read_unlock(); 135 136 ret = copy_to_user(&ifr->ifr_data, 137 &cifmap, sizeof(cifmap)); 138 } else { 139 ifmap.mem_start = dev->mem_start; 140 ifmap.mem_end = dev->mem_end; 141 ifmap.base_addr = dev->base_addr; 142 ifmap.irq = dev->irq; 143 ifmap.dma = dev->dma; 144 ifmap.port = dev->if_port; 145 rcu_read_unlock(); 146 147 ret = copy_to_user(&ifr->ifr_data, 148 &ifmap, sizeof(ifmap)); 149 } 150 ret = ret ? -EFAULT : 0; 151 break; 152 153 case SIOCSIFMAP: 154 if (!capable(CAP_NET_ADMIN) || 155 !ns_capable(net->user_ns, CAP_NET_ADMIN)) 156 return -EPERM; 157 158 if (in_compat_syscall()) { 159 if (copy_from_user(&cifmap, &ifr->ifr_data, 160 sizeof(cifmap))) 161 return -EFAULT; 162 163 ifmap.mem_start = cifmap.mem_start; 164 ifmap.mem_end = cifmap.mem_end; 165 ifmap.base_addr = cifmap.base_addr; 166 ifmap.irq = cifmap.irq; 167 ifmap.dma = cifmap.dma; 168 ifmap.port = cifmap.port; 169 } else { 170 if (copy_from_user(&ifmap, &ifr->ifr_data, 171 sizeof(ifmap))) 172 return -EFAULT; 173 } 174 175 rtnl_lock(); 176 dev = __dev_get_by_name(net, ifname); 177 if (!dev || !netif_device_present(dev)) 178 ret = -ENODEV; 179 else if (!dev->netdev_ops->ndo_set_config) 180 ret = -EOPNOTSUPP; 181 else 182 ret = dev->netdev_ops->ndo_set_config(dev, &ifmap); 183 rtnl_unlock(); 184 break; 185 } 186 return ret; 187 } 188 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org