Hi Bartosz, FYI, the error/warning still remains. tree: https://github.com/ammarfaizi2/linux-block google/android/kernel/common/android-4.19-stable head: 90a691fca4c2525068d9908ac203e9f09e4e33c0 commit: e96a10625581a499e8a4218ef504f3f53918408b [346/9999] UPSTREAM: nvmem: add support for cell info config: x86_64-randconfig-a011 (https://download.01.org/0day-ci/archive/20220122/202201221032.qQ2lBxEQ-lk...) compiler: gcc-9 (Debian 9.3.0-22) 9.3.0 reproduce (this is a W=1 build): # https://github.com/ammarfaizi2/linux-block/commit/e96a10625581a499e8a4218... git remote add ammarfaizi2-block https://github.com/ammarfaizi2/linux-block git fetch --no-tags ammarfaizi2-block google/android/kernel/common/android-4.19-stable git checkout e96a10625581a499e8a4218ef504f3f53918408b # save the config file to linux build tree mkdir build_dir make W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash drivers/nvmem/ 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 >>): 347 | int nvmem_add_cells(struct nvmem_device *nvmem, | ^~~~~~~~~~~~~~~ vim +/nvmem_add_cells +347 drivers/nvmem/core.c eace75cfdcf7d99 Srinivas Kandagatla 2015-07-27 337 b3db17e4b864e46 Andrew Lunn 2018-05-11 338 /** b3db17e4b864e46 Andrew Lunn 2018-05-11 339 * nvmem_add_cells() - Add cell information to an nvmem device b3db17e4b864e46 Andrew Lunn 2018-05-11 340 * b3db17e4b864e46 Andrew Lunn 2018-05-11 341 * @nvmem: nvmem device to add cells to. b3db17e4b864e46 Andrew Lunn 2018-05-11 342 * @info: nvmem cell info to add to the device b3db17e4b864e46 Andrew Lunn 2018-05-11 343 * @ncells: number of cells in info b3db17e4b864e46 Andrew Lunn 2018-05-11 344 * b3db17e4b864e46 Andrew Lunn 2018-05-11 345 * Return: 0 or negative error code on failure. b3db17e4b864e46 Andrew Lunn 2018-05-11 346 */ b3db17e4b864e46 Andrew Lunn 2018-05-11 @347 int nvmem_add_cells(struct nvmem_device *nvmem, b3db17e4b864e46 Andrew Lunn 2018-05-11 348 const struct nvmem_cell_info *info, b3db17e4b864e46 Andrew Lunn 2018-05-11 349 int ncells) eace75cfdcf7d99 Srinivas Kandagatla 2015-07-27 350 { eace75cfdcf7d99 Srinivas Kandagatla 2015-07-27 351 struct nvmem_cell **cells; eace75cfdcf7d99 Srinivas Kandagatla 2015-07-27 352 int i, rval; eace75cfdcf7d99 Srinivas Kandagatla 2015-07-27 353 b3db17e4b864e46 Andrew Lunn 2018-05-11 354 cells = kcalloc(ncells, sizeof(*cells), GFP_KERNEL); eace75cfdcf7d99 Srinivas Kandagatla 2015-07-27 355 if (!cells) eace75cfdcf7d99 Srinivas Kandagatla 2015-07-27 356 return -ENOMEM; eace75cfdcf7d99 Srinivas Kandagatla 2015-07-27 357 b3db17e4b864e46 Andrew Lunn 2018-05-11 358 for (i = 0; i < ncells; i++) { eace75cfdcf7d99 Srinivas Kandagatla 2015-07-27 359 cells[i] = kzalloc(sizeof(**cells), GFP_KERNEL); eace75cfdcf7d99 Srinivas Kandagatla 2015-07-27 360 if (!cells[i]) { eace75cfdcf7d99 Srinivas Kandagatla 2015-07-27 361 rval = -ENOMEM; eace75cfdcf7d99 Srinivas Kandagatla 2015-07-27 362 goto err; eace75cfdcf7d99 Srinivas Kandagatla 2015-07-27 363 } eace75cfdcf7d99 Srinivas Kandagatla 2015-07-27 364 eace75cfdcf7d99 Srinivas Kandagatla 2015-07-27 365 rval = nvmem_cell_info_to_nvmem_cell(nvmem, &info[i], cells[i]); 287980e49ffc0f6 Arnd Bergmann 2016-05-27 366 if (rval) { eace75cfdcf7d99 Srinivas Kandagatla 2015-07-27 367 kfree(cells[i]); eace75cfdcf7d99 Srinivas Kandagatla 2015-07-27 368 goto err; eace75cfdcf7d99 Srinivas Kandagatla 2015-07-27 369 } eace75cfdcf7d99 Srinivas Kandagatla 2015-07-27 370 eace75cfdcf7d99 Srinivas Kandagatla 2015-07-27 371 nvmem_cell_add(cells[i]); eace75cfdcf7d99 Srinivas Kandagatla 2015-07-27 372 } eace75cfdcf7d99 Srinivas Kandagatla 2015-07-27 373 eace75cfdcf7d99 Srinivas Kandagatla 2015-07-27 374 /* remove tmp array */ eace75cfdcf7d99 Srinivas Kandagatla 2015-07-27 375 kfree(cells); eace75cfdcf7d99 Srinivas Kandagatla 2015-07-27 376 eace75cfdcf7d99 Srinivas Kandagatla 2015-07-27 377 return 0; eace75cfdcf7d99 Srinivas Kandagatla 2015-07-27 378 err: dfdf141429f0895 Rasmus Villemoes 2016-02-08 379 while (i--) eace75cfdcf7d99 Srinivas Kandagatla 2015-07-27 380 nvmem_cell_drop(cells[i]); eace75cfdcf7d99 Srinivas Kandagatla 2015-07-27 381 dfdf141429f0895 Rasmus Villemoes 2016-02-08 382 kfree(cells); dfdf141429f0895 Rasmus Villemoes 2016-02-08 383 eace75cfdcf7d99 Srinivas Kandagatla 2015-07-27 384 return rval; eace75cfdcf7d99 Srinivas Kandagatla 2015-07-27 385 } b3db17e4b864e46 Andrew Lunn 2018-05-11 386 EXPORT_SYMBOL_GPL(nvmem_add_cells); eace75cfdcf7d99 Srinivas Kandagatla 2015-07-27 387 :::::: The code at line 347 was first introduced by commit :::::: b3db17e4b864e46ad150ebef69c0e0130a1c5fca drivers: nvmem: Export nvmem_add_cells() :::::: TO: Andrew Lunn <andrew(a)lunn.ch&gt; :::::: CC: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org