Hi Laurent, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on powerpc/next] [also build test WARNING on linux/master linus/master v5.16 next-20220110] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch] url: https://github.com/0day-ci/linux/commits/Laurent-Dufour/powerpc-pseries-r... base: https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git next config: powerpc64-randconfig-r026-20220106 (https://download.01.org/0day-ci/archive/20220110/202201102154.a95OQEPr-lk...) compiler: powerpc64-linux-gcc (GCC) 11.2.0 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/0day-ci/linux/commit/5cf0dea6e919e93ff3088f87acd40e846... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Laurent-Dufour/powerpc-pseries-read-the-lpar-name-from-the-firmware/20220107-001503 git checkout 5cf0dea6e919e93ff3088f87acd40e84608a6861 # save the config file to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross O=build_dir ARCH=powerpc SHELL=/bin/bash arch/powerpc/platforms/pseries/ 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 >>): arch/powerpc/platforms/pseries/lparcfg.c:257: warning: Function parameter or member 'm' not described in 'parse_mpp_data' arch/powerpc/platforms/pseries/lparcfg.c:295: warning: Function parameter or member 'm' not described in 'parse_mpp_x_data' arch/powerpc/platforms/pseries/lparcfg.c:334: warning: Function parameter or member 'm' not described in 'read_RTAS_lpar_name' * Read the LPAR name from the Device Tree. arch/powerpc/platforms/pseries/lparcfg.c:678: warning: Function parameter or member 'entitlement' not described in 'update_mpp' arch/powerpc/platforms/pseries/lparcfg.c:678: warning: Function parameter or member 'weight' not described in 'update_mpp' vim +334 arch/powerpc/platforms/pseries/lparcfg.c 323 324 /** 325 * Read the lpar name using the RTAS ibm,get-system-parameter call. 326 * 327 * The name read through this call is updated if changes are made by the end 328 * user on the hypervisor side. 329 * 330 * Some hypervisor (like Qemu) may not provide this value. In that case, a non 331 * null value is returned. 332 */ 333 static int read_RTAS_lpar_name(struct seq_file *m) 335 int rc, len, token; 336 union { 337 char raw_buffer[GET_SYS_PARM_BUF_SIZE]; 338 struct { 339 __be16 len; 340 char name[GET_SYS_PARM_BUF_SIZE-2]; 341 }; 342 } *local_buffer; 343 344 token = rtas_token("ibm,get-system-parameter"); 345 if (token == RTAS_UNKNOWN_SERVICE) 346 return -EINVAL; 347 348 local_buffer = kmalloc(sizeof(*local_buffer), GFP_KERNEL); 349 if (!local_buffer) 350 return -ENOMEM; 351 352 do { 353 spin_lock(&rtas_data_buf_lock); 354 memset(rtas_data_buf, 0, sizeof(*local_buffer)); 355 rc = rtas_call(token, 3, 1, NULL, SPLPAR_LPAR_NAME_TOKEN, 356 __pa(rtas_data_buf), sizeof(*local_buffer)); 357 if (!rc) 358 memcpy(local_buffer->raw_buffer, rtas_data_buf, 359 sizeof(local_buffer->raw_buffer)); 360 spin_unlock(&rtas_data_buf_lock); 361 } while (rtas_busy_delay(rc)); 362 363 if (!rc) { 364 /* Force end of string */ 365 len = min((int) be16_to_cpu(local_buffer->len), 366 (int) sizeof(local_buffer->name)-1); 367 local_buffer->name[len] = '\0'; 368 369 seq_printf(m, "partition_name=%s\n", local_buffer->name); 370 } else 371 rc = -ENODATA; 372 373 kfree(local_buffer); 374 return rc; 375 } 376 377 /** 379 * 380 * The value read in the DT is not updated if the end-user is touching the LPAR 381 * name on the hypervisor side. 382 */ 383 static int read_DT_lpar_name(struct seq_file *m) 384 { 385 struct device_node *rootdn; 386 const char *name; 387 388 rootdn = of_find_node_by_path("/"); 389 if (!rootdn) 390 return -ENOENT; 391 392 name = of_get_property(rootdn, "ibm,partition-name", NULL); 393 if (!name) 394 return -ENOENT; 395 396 seq_printf(m, "partition_name=%s\n", name); 397 return 0; 398 } 399 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org