Hi Andrew, FYI, the error/warning still remains. tree: https://github.com/shenki/linux dev-5.4 head: 55da988a12769b9c8594b7109fdedd41e5e8ae75 commit: b87d6368d9e83b454f28b5ab45aa9c1ee7ef5264 [134/290] soc: aspeed: Fail probe of lpc-ctrl if reserved memory is not aligned config: riscv-allyesconfig (attached as .config) compiler: riscv64-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 # https://github.com/shenki/linux/commit/b87d6368d9e83b454f28b5ab45aa9c1ee7... git remote add shenki https://github.com/shenki/linux git fetch --no-tags shenki dev-5.4 git checkout b87d6368d9e83b454f28b5ab45aa9c1ee7ef5264 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=riscv If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>): In file included from include/linux/miscdevice.h:7, from drivers/soc/aspeed/aspeed-lpc-ctrl.c:9: drivers/soc/aspeed/aspeed-lpc-ctrl.c: In function 'aspeed_lpc_ctrl_probe': 247 | dev_err(dev, "Reserved memory size must be a power of 2, got %zu\n", | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/device.h:1658:22: note: in definition of macro 'dev_fmt' 1658 | #define dev_fmt(fmt) fmt | ^~~ drivers/soc/aspeed/aspeed-lpc-ctrl.c:247:4: note: in expansion of macro 'dev_err' 247 | dev_err(dev, "Reserved memory size must be a power of 2, got %zu\n", | ^~~~~~~ drivers/soc/aspeed/aspeed-lpc-ctrl.c:247:67: note: format string is defined here 247 | dev_err(dev, "Reserved memory size must be a power of 2, got %zu\n", | ~~^ | | | long unsigned int | %llu In file included from include/linux/miscdevice.h:7, from drivers/soc/aspeed/aspeed-lpc-ctrl.c:9: drivers/soc/aspeed/aspeed-lpc-ctrl.c:253:17: warning: format '%zu' expects argument of type 'size_t', but argument 3 has type 'resource_size_t' {aka 'long long unsigned int'} [-Wformat=] 253 | dev_err(dev, "Reserved memory must be naturally aligned for size %zu\n", | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/device.h:1658:22: note: in definition of macro 'dev_fmt' 1658 | #define dev_fmt(fmt) fmt | ^~~ drivers/soc/aspeed/aspeed-lpc-ctrl.c:253:4: note: in expansion of macro 'dev_err' 253 | dev_err(dev, "Reserved memory must be naturally aligned for size %zu\n", | ^~~~~~~ drivers/soc/aspeed/aspeed-lpc-ctrl.c:253:71: note: format string is defined here 253 | dev_err(dev, "Reserved memory must be naturally aligned for size %zu\n", | ~~^ | | | long unsigned int | %llu vim +247 drivers/soc/aspeed/aspeed-lpc-ctrl.c 197 198 static int aspeed_lpc_ctrl_probe(struct platform_device *pdev) 199 { 200 struct aspeed_lpc_ctrl *lpc_ctrl; 201 struct device_node *node; 202 struct resource resm; 203 struct device *dev; 204 int rc; 205 206 dev = &pdev->dev; 207 208 lpc_ctrl = devm_kzalloc(dev, sizeof(*lpc_ctrl), GFP_KERNEL); 209 if (!lpc_ctrl) 210 return -ENOMEM; 211 212 /* If flash is described in device tree then store */ 213 node = of_parse_phandle(dev->of_node, "flash", 0); 214 if (!node) { 215 dev_dbg(dev, "Didn't find host pnor flash node\n"); 216 } else { 217 rc = of_address_to_resource(node, 1, &resm); 218 of_node_put(node); 219 if (rc) { 220 dev_err(dev, "Couldn't address to resource for flash\n"); 221 return rc; 222 } 223 224 lpc_ctrl->pnor_size = resource_size(&resm); 225 lpc_ctrl->pnor_base = resm.start; 226 } 227 228 229 dev_set_drvdata(&pdev->dev, lpc_ctrl); 230 231 /* If memory-region is described in device tree then store */ 232 node = of_parse_phandle(dev->of_node, "memory-region", 0); 233 if (!node) { 234 dev_dbg(dev, "Didn't find reserved memory\n"); 235 } else { 236 rc = of_address_to_resource(node, 0, &resm); 237 of_node_put(node); 238 if (rc) { 239 dev_err(dev, "Couldn't address to resource for reserved memory\n"); 240 return -ENXIO; 241 } 242 243 lpc_ctrl->mem_size = resource_size(&resm); 244 lpc_ctrl->mem_base = resm.start; 245 246 if (!is_power_of_2(lpc_ctrl->mem_size)) { 248 lpc_ctrl->mem_size); 249 return -EINVAL; 250 } 251 252 if (!IS_ALIGNED(lpc_ctrl->mem_base, lpc_ctrl->mem_size)) { 253 dev_err(dev, "Reserved memory must be naturally aligned for size %zu\n", 254 lpc_ctrl->mem_size); 255 return -EINVAL; 256 } 257 } 258 259 lpc_ctrl->regmap = syscon_node_to_regmap( 260 pdev->dev.parent->of_node); 261 if (IS_ERR(lpc_ctrl->regmap)) { 262 dev_err(dev, "Couldn't get regmap\n"); 263 return -ENODEV; 264 } 265 266 lpc_ctrl->clk = devm_clk_get(dev, NULL); 267 if (IS_ERR(lpc_ctrl->clk)) { 268 dev_err(dev, "couldn't get clock\n"); 269 return PTR_ERR(lpc_ctrl->clk); 270 } 271 rc = clk_prepare_enable(lpc_ctrl->clk); 272 if (rc) { 273 dev_err(dev, "couldn't enable clock\n"); 274 return rc; 275 } 276 277 lpc_ctrl->miscdev.minor = MISC_DYNAMIC_MINOR; 278 lpc_ctrl->miscdev.name = DEVICE_NAME; 279 lpc_ctrl->miscdev.fops = &aspeed_lpc_ctrl_fops; 280 lpc_ctrl->miscdev.parent = dev; 281 rc = misc_register(&lpc_ctrl->miscdev); 282 if (rc) { 283 dev_err(dev, "Unable to register device\n"); 284 goto err; 285 } 286 287 return 0; 288 289 err: 290 clk_disable_unprepare(lpc_ctrl->clk); 291 return rc; 292 } 293 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org