tree: https://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux-block.git block-5.16 head: 5eff363838654790f67f4bd564c5782967f67bcc commit: 776b54e97a7d993ba23696e032426d5dea5bbe70 [14/19] mtd_blkdevs: don't scan partitions for plain mtdblock config: arm-pxa3xx_defconfig (https://download.01.org/0day-ci/archive/20211211/202112112312.TqjBbfUS-lk...) compiler: arm-linux-gnueabi-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://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux-block.git/com... git remote add axboe-block https://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux-block.git git fetch --no-tags axboe-block block-5.16 git checkout 776b54e97a7d993ba23696e032426d5dea5bbe70 # 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=arm SHELL=/bin/bash If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; Note: the axboe-block/block-5.16 HEAD 5eff363838654790f67f4bd564c5782967f67bcc builds fine. It only hurts bisectability. All errors (new ones prefixed by >>): drivers/mtd/mtd_blkdevs.c: In function 'add_mtd_blktrans_dev': 361 | gd->flags |= GENHD_FL_NO_PART; | ^~~~~~~~~~~~~~~~ | GENHD_FL_NO_PART_SCAN drivers/mtd/mtd_blkdevs.c:361:30: note: each undeclared identifier is reported only once for each function it appears in vim +361 drivers/mtd/mtd_blkdevs.c 274 275 int add_mtd_blktrans_dev(struct mtd_blktrans_dev *new) 276 { 277 struct mtd_blktrans_ops *tr = new->tr; 278 struct mtd_blktrans_dev *d; 279 int last_devnum = -1; 280 struct gendisk *gd; 281 int ret; 282 283 lockdep_assert_held(&mtd_table_mutex); 284 285 list_for_each_entry(d, &tr->devs, list) { 286 if (new->devnum == -1) { 287 /* Use first free number */ 288 if (d->devnum != last_devnum+1) { 289 /* Found a free devnum. Plug it in here */ 290 new->devnum = last_devnum+1; 291 list_add_tail(&new->list, &d->list); 292 goto added; 293 } 294 } else if (d->devnum == new->devnum) { 295 /* Required number taken */ 296 return -EBUSY; 297 } else if (d->devnum > new->devnum) { 298 /* Required number was free */ 299 list_add_tail(&new->list, &d->list); 300 goto added; 301 } 302 last_devnum = d->devnum; 303 } 304 305 ret = -EBUSY; 306 if (new->devnum == -1) 307 new->devnum = last_devnum+1; 308 309 /* Check that the device and any partitions will get valid 310 * minor numbers and that the disk naming code below can cope 311 * with this number. */ 312 if (new->devnum > (MINORMASK >> tr->part_bits) || 313 (tr->part_bits && new->devnum >= 27 * 26)) 314 return ret; 315 316 list_add_tail(&new->list, &tr->devs); 317 added: 318 319 mutex_init(&new->lock); 320 kref_init(&new->ref); 321 if (!tr->writesect) 322 new->readonly = 1; 323 324 ret = -ENOMEM; 325 new->tag_set = kzalloc(sizeof(*new->tag_set), GFP_KERNEL); 326 if (!new->tag_set) 327 goto out_list_del; 328 329 ret = blk_mq_alloc_sq_tag_set(new->tag_set, &mtd_mq_ops, 2, 330 BLK_MQ_F_SHOULD_MERGE | BLK_MQ_F_BLOCKING); 331 if (ret) 332 goto out_kfree_tag_set; 333 334 /* Create gendisk */ 335 gd = blk_mq_alloc_disk(new->tag_set, new); 336 if (IS_ERR(gd)) { 337 ret = PTR_ERR(gd); 338 goto out_free_tag_set; 339 } 340 341 new->disk = gd; 342 new->rq = new->disk->queue; 343 gd->private_data = new; 344 gd->major = tr->major; 345 gd->first_minor = (new->devnum) << tr->part_bits; 346 gd->minors = 1 << tr->part_bits; 347 gd->fops = &mtd_block_ops; 348 349 if (tr->part_bits) { 350 if (new->devnum < 26) 351 snprintf(gd->disk_name, sizeof(gd->disk_name), 352 "%s%c", tr->name, 'a' + new->devnum); 353 else 354 snprintf(gd->disk_name, sizeof(gd->disk_name), 355 "%s%c%c", tr->name, 356 'a' - 1 + new->devnum / 26, 357 'a' + new->devnum % 26); 358 } else { 359 snprintf(gd->disk_name, sizeof(gd->disk_name), 360 "%s%d", tr->name, new->devnum); 362 } 363 364 set_capacity(gd, ((u64)new->size * tr->blksize) >> 9); 365 366 /* Create the request queue */ 367 spin_lock_init(&new->queue_lock); 368 INIT_LIST_HEAD(&new->rq_list); 369 370 if (tr->flush) 371 blk_queue_write_cache(new->rq, true, false); 372 373 blk_queue_logical_block_size(new->rq, tr->blksize); 374 375 blk_queue_flag_set(QUEUE_FLAG_NONROT, new->rq); 376 blk_queue_flag_clear(QUEUE_FLAG_ADD_RANDOM, new->rq); 377 378 if (tr->discard) { 379 blk_queue_flag_set(QUEUE_FLAG_DISCARD, new->rq); 380 blk_queue_max_discard_sectors(new->rq, UINT_MAX); 381 new->rq->limits.discard_granularity = tr->blksize; 382 } 383 384 gd->queue = new->rq; 385 386 if (new->readonly) 387 set_disk_ro(gd, 1); 388 389 ret = device_add_disk(&new->mtd->dev, gd, NULL); 390 if (ret) 391 goto out_cleanup_disk; 392 393 if (new->disk_attributes) { 394 ret = sysfs_create_group(&disk_to_dev(gd)->kobj, 395 new->disk_attributes); 396 WARN_ON(ret); 397 } 398 return 0; 399 400 out_cleanup_disk: 401 blk_cleanup_disk(new->disk); 402 out_free_tag_set: 403 blk_mq_free_tag_set(new->tag_set); 404 out_kfree_tag_set: 405 kfree(new->tag_set); 406 out_list_del: 407 list_del(&new->list); 408 return ret; 409 } 410 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org