tree: https://gitee.com/openeuler/kernel.git openEuler-1.0-LTS head: 27e321784c005c852ca4b3a2d146547deac0698f commit: 51d0e1a742714b2599d54fd92a71bd2998b01084 [1932/1932] support multiple node for getting phys interface config: arm64-randconfig-r132-20251106 (https://download.01.org/0day-ci/archive/20251106/202511060739.4h8XJsMM-lkp@i...) compiler: aarch64-linux-gcc (GCC) 11.5.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251106/202511060739.4h8XJsMM-lkp@i...) 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@intel.com> | Closes: https://lore.kernel.org/oe-kbuild-all/202511060739.4h8XJsMM-lkp@intel.com/ sparse warnings: (new ones prefixed by >>) drivers/char/svm.c:248:20: sparse: sparse: symbol 'svm_find_mem_reg_node' was not declared. Should it be static? drivers/char/svm.c:325:14: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected struct svm_va2pa_slot *slot @@ got void [noderef] <asn:2> * @@ drivers/char/svm.c:325:14: sparse: expected struct svm_va2pa_slot *slot drivers/char/svm.c:325:14: sparse: got void [noderef] <asn:2> *

...

drivers/char/svm.c:366:43: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected void volatile [noderef] <asn:2> *addr @@ got struct svm_va2pa_slot *slots @@ drivers/char/svm.c:366:43: sparse: expected void volatile [noderef] <asn:2> *addr drivers/char/svm.c:366:43: sparse: got struct svm_va2pa_slot *slots drivers/char/svm.c:449:6: sparse: sparse: symbol 'sysrq_sched_debug_show_export' was not declared. Should it be static? drivers/char/svm.c:1272:35: sparse: sparse: Using plain integer as NULL pointer drivers/char/svm.c:248:21: warning: no previous prototype for 'svm_find_mem_reg_node' [-Wmissing-prototypes] 248 | struct device_node *svm_find_mem_reg_node(struct device *dev, const char *compat) | ^~~~~~~~~~~~~~~~~~~~~ drivers/char/svm.c:449:6: warning: no previous prototype for 'sysrq_sched_debug_show_export' [-Wmissing-prototypes] 449 | void sysrq_sched_debug_show_export(void) | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/char/svm.c:1476:5: warning: no previous prototype for 'svm_get_pasid' [-Wmissing-prototypes] 1476 | int svm_get_pasid(pid_t vpid, int dev_id __maybe_unused) | ^~~~~~~~~~~~~ drivers/char/svm.c:2269:36: warning: 'svm_acpi_match' defined but not used [-Wunused-const-variable=] 2269 | static const struct acpi_device_id svm_acpi_match[] = { | ^~~~~~~~~~~~~~ In file included from arch/arm64/include/asm/atomic.h:34, from include/linux/atomic.h:7, from include/asm-generic/bitops/atomic.h:5, from arch/arm64/include/asm/bitops.h:37, from include/linux/bitops.h:19, from include/linux/kernel.h:11, from include/asm-generic/bug.h:18, from arch/arm64/include/asm/bug.h:37, from arch/arm64/include/asm/memory.h:27, from arch/arm64/include/asm/esr.h:21, from drivers/char/svm.c:10: drivers/char/svm.c: In function 'svm_proc_load_flag': arch/arm64/include/asm/atomic_lse.h:492:9: warning: array subscript 'long unsigned int[0]' is partly outside array bounds of 'atomic_t[1]' [-Warray-bounds] 492 | asm volatile( 37- | ^~~ arch/arm64/include/asm/atomic_lse.h:523:1: note: in expansion of macro '__CMPXCHG_CASE' 523 | __CMPXCHG_CASE(w, , mb_4, al, "memory") | ^~~~~~~~~~~~~~ drivers/char/svm.c:1796:25: note: while referencing 'l2buf_load_flag' 1796 | static atomic_t l2buf_load_flag = ATOMIC_INIT(0); | ^~~~~~~~~~~~~~~ In file included from arch/arm64/include/asm/atomic.h:34, from include/linux/atomic.h:7, from include/asm-generic/bitops/atomic.h:5, from arch/arm64/include/asm/bitops.h:37, from include/linux/bitops.h:19, from include/linux/kernel.h:11, from include/asm-generic/bug.h:18, from arch/arm64/include/asm/bug.h:37, from arch/arm64/include/asm/memory.h:27, from arch/arm64/include/asm/esr.h:21, from drivers/char/svm.c:10: arch/arm64/include/asm/atomic_lse.h:492:9: warning: array subscript 'long unsigned int[0]' is partly outside array bounds of 'atomic_t[1]' [-Warray-bounds] 492 | asm volatile( 57- | ^~~ arch/arm64/include/asm/atomic_lse.h:523:1: note: in expansion of macro '__CMPXCHG_CASE' 523 | __CMPXCHG_CASE(w, , mb_4, al, "memory") | ^~~~~~~~~~~~~~ drivers/char/svm.c:1796:25: note: while referencing 'l2buf_load_flag' 1796 | static atomic_t l2buf_load_flag = ATOMIC_INIT(0); | ^~~~~~~~~~~~~~~

vim +366 drivers/char/svm.c 247

248 struct device_node *svm_find_mem_reg_node(struct device *dev, const char *compat) 249 { 250 int index = 0; 251 struct device_node *tmp = NULL; 252 struct device_node *np = dev->of_node; 253 254 for (; ; index++) { 255 tmp = of_parse_phandle(np, "memory-region", index); 256 if (!tmp) 257 break; 258 259 if (of_device_is_compatible(tmp, compat)) 260 return tmp; 261 262 of_node_put(tmp); 263 } 264 265 return NULL; 266 } 267 268 static int svm_parse_trunk_memory(struct device *dev) 269 { 270 int err, count; 271 struct resource r; 272 struct device_node *trunk = NULL; 273 274 trunk = svm_find_mem_reg_node(dev, SVM_MEM_REG); 275 if (!trunk) { 276 dev_err(dev, "Didn't find reserved memory\n"); 277 return -EINVAL; 278 } 279 280 for (count = 0; count < SVM_VA2PA_TRUNK_COUNT_MAX; count++) { 281 err = of_address_to_resource(trunk, count, &r); 282 if (err) 283 break; 284 285 va2pa_trunk[count].base = r.start; 286 va2pa_trunk[count].size = resource_size(&r); 287 } 288 289 if (!count) { 290 dev_err(dev, "Couldn't address to resource for reserved memory\n"); 291 return -ENODEV; 292 } 293 294 return 0; 295 } 296 297 static int __svm_setup_trunk(struct device *dev, struct svm_va2pa_trunk *trunk) 298 { 299 int slot_total; 300 unsigned long *bitmap = NULL; 301 struct svm_va2pa_slot *slot = NULL; 302 phys_addr_t base = trunk->base; 303 unsigned long size = trunk->size; 304 305 if (!IS_ALIGNED(base, SVM_VA2PA_MEMORY_ALIGN)) { 306 dev_err(dev, "Didn't aligned to %u\n", SVM_VA2PA_MEMORY_ALIGN); 307 return -EINVAL; 308 } 309 310 if ((size == 0) || (size > SVM_VA2PA_TRUNK_SIZE_MAX)) { 311 dev_err(dev, "Size of reserved memory is not right\n"); 312 return -EINVAL; 313 } 314 315 slot_total = size / SVM_VA2PA_SLOT_SIZE; 316 if (slot_total < BITS_PER_LONG) 317 return -EINVAL; 318 319 bitmap = kvcalloc(slot_total / BITS_PER_LONG, sizeof(unsigned long), GFP_KERNEL); 320 if (!bitmap) { 321 dev_err(dev, "alloc memory failed\n"); 322 return -ENOMEM; 323 } 324 325 slot = ioremap(base, size); 326 if (!slot) { 327 kvfree(bitmap); 328 dev_err(dev, "Ioremap trunk failed\n"); 329 return -ENXIO; 330 } 331 332 trunk->slots = slot; 333 trunk->slot_used = 0; 334 trunk->slot_total = slot_total; 335 trunk->bitmap = bitmap; 336 mutex_init(&trunk->mutex); 337 338 return 0; 339 } 340 341 static int svm_setup_trunk(struct device *dev) 342 { 343 int err = 0; 344 int count; 345 346 for (count = 0; count < SVM_VA2PA_TRUNK_COUNT_MAX; count++) { 347 if (!va2pa_trunk[count].base) 348 break; 349 350 err = __svm_setup_trunk(dev, &va2pa_trunk[count]); 351 if (err) 352 break; 353 } 354 355 return err; 356 } 357 358 static void svm_remove_trunk(struct device *dev) 359 { 360 int count; 361 362 for (count = 0; count < SVM_VA2PA_TRUNK_COUNT_MAX; count++) { 363 if (!va2pa_trunk[count].base) 364 break; 365 366 iounmap(va2pa_trunk[count].slots); 367 kvfree(va2pa_trunk[count].bitmap); 368 va2pa_trunk[count].slots = NULL; 369 va2pa_trunk[count].bitmap = NULL; 370 } 371 } 372

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