tree: https://github.com/Freescale/linux-fslc pr/344 head: 2cbb55e591febb414b623269d61d4444113c285f commit: 3ea2de8648ea6ecd86e527bdd5993740e8bc7cef [9435/18956] virtio: Add virtio-over-ivshmem transport driver config: ia64-randconfig-s032-20210520 (attached as .config) compiler: ia64-linux-gcc (GCC) 9.3.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # apt-get install sparse # sparse version: v0.6.3-341-g8af24329-dirty # https://github.com/Freescale/linux-fslc/commit/3ea2de8648ea6ecd86e527bdd5... git remote add freescale-fslc https://github.com/Freescale/linux-fslc git fetch --no-tags freescale-fslc pr/344 git checkout 3ea2de8648ea6ecd86e527bdd5993740e8bc7cef # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' W=1 ARCH=ia64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; sparse warnings: (new ones prefixed by >>) drivers/virtio/virtio_ivshmem.c:140:42: sparse: expected unsigned short [usertype] drivers/virtio/virtio_ivshmem.c:140:42: sparse: got restricted __le16 [usertype] drivers/virtio/virtio_ivshmem.c:142:42: sparse: expected unsigned int [usertype] drivers/virtio/virtio_ivshmem.c:142:42: sparse: got restricted __le32 [usertype] drivers/virtio/virtio_ivshmem.c:144:42: sparse: expected unsigned long long [usertype] drivers/virtio/virtio_ivshmem.c:144:42: sparse: got restricted __le64 [usertype] drivers/virtio/virtio_ivshmem.c:188:19: sparse: expected restricted __le16 [usertype] w drivers/virtio/virtio_ivshmem.c:188:19: sparse: got unsigned short [usertype] drivers/virtio/virtio_ivshmem.c:192:19: sparse: expected restricted __le32 [usertype] l drivers/virtio/virtio_ivshmem.c:192:19: sparse: got unsigned int [usertype] drivers/virtio/virtio_ivshmem.c:196:19: sparse: expected restricted __le64 [usertype] q drivers/virtio/virtio_ivshmem.c:196:19: sparse: got unsigned long long [usertype] drivers/virtio/virtio_ivshmem.c:233:20: sparse: expected unsigned int [usertype] gen drivers/virtio/virtio_ivshmem.c:233:20: sparse: got restricted __le32 [addressable] __val drivers/virtio/virtio_ivshmem.c:236:55: sparse: sparse: restricted __le32 degrades to integer drivers/virtio/virtio_ivshmem.c:243:21: sparse: expected unsigned int [usertype] gen drivers/virtio/virtio_ivshmem.c:243:21: sparse: got restricted __le32 [addressable] __val drivers/virtio/virtio_ivshmem.c:336:13: sparse: sparse: restricted __le32 degrades to integer drivers/virtio/virtio_ivshmem.c:405:14: sparse: expected unsigned int size drivers/virtio/virtio_ivshmem.c:405:14: sparse: got restricted __le16 [usertype] queue_size drivers/virtio/virtio_ivshmem.c:411:29: sparse: expected unsigned int device_vector drivers/virtio/virtio_ivshmem.c:411:29: sparse: got restricted __le16 [usertype] queue_device_vector drivers/virtio/virtio_ivshmem.c:865:34: sparse: sparse: restricted __le32 degrades to integer drivers/virtio/virtio_ivshmem.c:889:63: sparse: expected unsigned long size drivers/virtio/virtio_ivshmem.c:889:63: sparse: got restricted __le32 [usertype] size drivers/virtio/virtio_ivshmem.c:900:36: sparse: sparse: restricted __le32 degrades to integer drivers/virtio/virtio_ivshmem.c:908:16: sparse: expected unsigned int [usertype] value drivers/virtio/virtio_ivshmem.c:908:16: sparse: got restricted __le32 [usertype] drivers/virtio/virtio_ivshmem.c: note: in included file (through arch/ia64/include/asm/io.h, arch/ia64/include/asm/smp.h, include/linux/smp.h, ...): include/asm-generic/io.h:225:22: sparse: sparse: incorrect type in argument 1 (different base types) @@ expected unsigned int [usertype] value @@ got restricted __le32 [usertype] @@ include/asm-generic/io.h:225:22: sparse: expected unsigned int [usertype] value include/asm-generic/io.h:225:22: sparse: got restricted __le32 [usertype] include/asm-generic/io.h:225:22: sparse: sparse: incorrect type in argument 1 (different base types) @@ expected unsigned int [usertype] value @@ got restricted __le32 [usertype] @@ include/asm-generic/io.h:225:22: sparse: expected unsigned int [usertype] value include/asm-generic/io.h:225:22: sparse: got restricted __le32 [usertype] include/asm-generic/io.h:225:22: sparse: sparse: incorrect type in argument 1 (different base types) @@ expected unsigned int [usertype] value @@ got restricted __le32 [usertype] @@ include/asm-generic/io.h:225:22: sparse: expected unsigned int [usertype] value include/asm-generic/io.h:225:22: sparse: got restricted __le32 [usertype] include/asm-generic/io.h:179:15: sparse: sparse: cast to restricted __le32 include/asm-generic/io.h:179:15: sparse: sparse: cast to restricted __le32 include/asm-generic/io.h:225:22: sparse: sparse: incorrect type in argument 1 (different base types) @@ expected unsigned int [usertype] value @@ got restricted __le32 [usertype] @@ include/asm-generic/io.h:225:22: sparse: expected unsigned int [usertype] value include/asm-generic/io.h:225:22: sparse: got restricted __le32 [usertype] include/asm-generic/io.h:225:22: sparse: sparse: incorrect type in argument 1 (different base types) @@ expected unsigned int [usertype] value @@ got restricted __le32 [usertype] @@ include/asm-generic/io.h:225:22: sparse: expected unsigned int [usertype] value include/asm-generic/io.h:225:22: sparse: got restricted __le32 [usertype] include/asm-generic/io.h:225:22: sparse: sparse: incorrect type in argument 1 (different base types) @@ expected unsigned int [usertype] value @@ got restricted __le32 [usertype] @@ include/asm-generic/io.h:225:22: sparse: expected unsigned int [usertype] value include/asm-generic/io.h:225:22: sparse: got restricted __le32 [usertype] include/asm-generic/io.h:225:22: sparse: sparse: incorrect type in argument 1 (different base types) @@ expected unsigned int [usertype] value @@ got restricted __le32 [usertype] @@ include/asm-generic/io.h:225:22: sparse: expected unsigned int [usertype] value include/asm-generic/io.h:225:22: sparse: got restricted __le32 [usertype] vim +119 drivers/virtio/virtio_ivshmem.c 115 116 static bool vi_synchronize_reg_write(struct virtio_ivshmem_device *vi_dev) 117 { 118 while (READ_ONCE(vi_dev->virtio_header->write_transaction)) { 120 dev_err_ratelimited(&vi_dev->pci_dev->dev, 121 "backend failed!"); 122 return false; 123 } 124 cpu_relax(); 125 } 126 return true; 127 } 128 129 static bool vi_reg_write(struct virtio_ivshmem_device *vi_dev, unsigned int reg, 130 u64 value, unsigned int size) 131 { 132 u8 *reg_area = (u8 *)vi_dev->virtio_header; 133 134 if (!vi_synchronize_reg_write(vi_dev)) 135 return false; 136 137 if (size == 1) 138 *(u8 *)(reg_area + reg) = (u8)value; 139 else if (size == 2) 141 else if (size == 4) 143 else if (size == 8) 145 else 146 BUG(); 147 virt_wmb(); 148 149 vi_dev->virtio_header->write_transaction = cpu_to_le32(reg); 150 virt_wmb(); 151 152 writel((vi_dev->peer_id << 16), &vi_dev->ivshm_regs->doorbell); 153 154 return true; 155 } 156 157 static bool vi_reg_write16(struct virtio_ivshmem_device *vi_dev, 158 unsigned int reg, u32 value) 159 { 160 return vi_reg_write(vi_dev, reg, value, 2); 161 } 162 163 static bool vi_reg_write32(struct virtio_ivshmem_device *vi_dev, 164 unsigned int reg, u32 value) 165 { 166 return vi_reg_write(vi_dev, reg, value, 4); 167 } 168 169 static bool vi_reg_write64(struct virtio_ivshmem_device *vi_dev, 170 unsigned int reg, u64 value) 171 { 172 return vi_reg_write(vi_dev, reg, value, 8); 173 } 174 175 static void vi_get(struct virtio_device *vdev, unsigned offset, 176 void *buf, unsigned len) 177 { 178 struct virtio_ivshmem_device *vi_dev = to_virtio_ivshmem_device(vdev); 179 __le16 w; 180 __le32 l; 181 __le64 q; 182 183 switch (len) { 184 case 1: 185 *(u8 *)buf = *(u8 *)(vi_dev->virtio_header->config + offset); 186 break; 187 case 2: 189 *(u16 *)buf = le16_to_cpu(w); 190 break; 191 case 4: 193 *(u32 *)buf = le32_to_cpu(l); 194 break; 195 case 8: 197 *(u64 *)buf = le64_to_cpu(q); 198 break; 199 default: 200 BUG(); 201 } 202 } 203 204 static void vi_set(struct virtio_device *vdev, unsigned offset, 205 const void *buf, unsigned len) 206 { 207 u64 value; 208 209 switch (len) { 210 case 1: 211 value = *(u8 *)buf; 212 break; 213 case 2: 214 value = *(u16 *)buf; 215 break; 216 case 4: 217 value = *(u32 *)buf; 218 break; 219 case 8: 220 value = *(u64 *)buf; 221 break; 222 default: 223 BUG(); 224 } 225 vi_reg_write(to_virtio_ivshmem_device(vdev), 226 offsetof(struct virtio_ivshmem_header, config) + offset, 227 value, len); 228 } 229 230 static u32 vi_generation(struct virtio_device *vdev) 231 { 232 struct virtio_ivshmem_device *vi_dev = to_virtio_ivshmem_device(vdev); 234 235 while (gen & 1) { 236 if (READ_ONCE(*vi_dev->peer_state) != VIRTIO_STATE_READY) { 237 dev_err_ratelimited(&vi_dev->pci_dev->dev, 238 "backend failed!"); 239 return 0; 240 } 241 cpu_relax(); 242 244 } 245 return gen; 246 } 247 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org