tree: https://github.com/ambarus/linux-0day v5.10-atmel-qspi-under-spi-nor head: fe0f9562057be30db3f6282b0809e3243bd5235d commit: fe0f9562057be30db3f6282b0809e3243bd5235d [35/35] FIX mount problem! config: arm-allyesconfig (attached as .config) compiler: arm-linux-gnueabi-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/ambarus/linux-0day/commit/fe0f9562057be30db3f6282b0809... git remote add ambarus https://github.com/ambarus/linux-0day git fetch --no-tags ambarus v5.10-atmel-qspi-under-spi-nor git checkout fe0f9562057be30db3f6282b0809e3243bd5235d # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=arm 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 >>): drivers/mtd/spi-nor/atmel-quadspi.c: In function 'atmel_qspi_exec_op': 357 | if (op->data.nbytes) | ^ drivers/mtd/spi-nor/atmel-quadspi.c: At top level: drivers/mtd/spi-nor/atmel-quadspi.c:435:13: warning: no previous prototype for 'atmel_qspi_get_name' [-Wmissing-prototypes] 435 | const char *atmel_qspi_get_name(struct spi_mem *spimem) | ^~~~~~~~~~~~~~~~~~~ vim +/else +357 drivers/mtd/spi-nor/atmel-quadspi.c 294 295 static int atmel_qspi_exec_op(struct spi_mem *mem, const struct spi_mem_op *op) 296 { 297 struct atmel_qspi *aq = spi_controller_get_devdata(mem->spi->master); 298 int mode; 299 u32 dummy_cycles = 0; 300 u32 iar, icr, ifr, sr; 301 int err = 0; 302 303 iar = 0; 304 icr = QSPI_ICR_INST(op->cmd.opcode); 305 ifr = QSPI_IFR_INSTEN; 306 307 mode = find_mode(op); 308 if (mode < 0) 309 return -ENOTSUPP; 310 311 ifr |= sama5d2_qspi_modes[mode].config; 312 313 if (op->dummy.buswidth && op->dummy.nbytes) 314 dummy_cycles = op->dummy.nbytes * 8 / op->dummy.buswidth; 315 316 if (op->addr.buswidth) { 317 switch (op->addr.nbytes) { 318 case 0: 319 break; 320 case 1: 321 ifr |= QSPI_IFR_OPTEN | QSPI_IFR_OPTL_8BIT; 322 icr |= QSPI_ICR_OPT(op->addr.val & 0xff); 323 break; 324 case 2: 325 if (dummy_cycles < 8 / op->addr.buswidth) { 326 ifr &= ~QSPI_IFR_INSTEN; 327 ifr |= QSPI_IFR_ADDREN; 328 iar = (op->cmd.opcode << 16) | 329 (op->addr.val & 0xffff); 330 } else { 331 ifr |= QSPI_IFR_ADDREN; 332 iar = (op->addr.val << 8) & 0xffffff; 333 dummy_cycles -= 8 / op->addr.buswidth; 334 } 335 break; 336 case 3: 337 ifr |= QSPI_IFR_ADDREN; 338 iar = op->addr.val & 0xffffff; 339 break; 340 case 4: 341 ifr |= QSPI_IFR_ADDREN | QSPI_IFR_ADDRL; 342 iar = op->addr.val & 0x7ffffff; 343 break; 344 default: 345 return -ENOTSUPP; 346 } 347 } 348 349 /* Set number of dummy cycles */ 350 if (dummy_cycles) 351 ifr |= QSPI_IFR_NBDUM(dummy_cycles); 352 353 /* Set data enable */ 354 if (op->data.nbytes) 355 ifr |= QSPI_IFR_DATAEN; 356 358 if (op->data.dir == SPI_MEM_DATA_IN) 359 ifr |= QSPI_IFR_TFRTYP_TRSFR_READ_MEM; 360 else 361 ifr |= QSPI_IFR_TFRTYP_TRSFR_WRITE_MEM; 362 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org