Hi,

I love your patch! Yet something to improve:

[auto build test ERROR on spi/for-next]
[also build test ERROR on next-20210507]
[cannot apply to mtd/nand/next stm32/stm32-next v5.12]
[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/patrice-chotard-foss-st-com/MTD-spinand-Add-spi_mem_poll_status-support/20210507-211933
base:   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi.git for-next
config: arc-randconfig-r021-20210507 (attached as .config)
compiler: arc-elf-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/0day-ci/linux/commit/7f27dc0ce5a74374bac3b33a0e77098ad6465ab8
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review patrice-chotard-foss-st-com/MTD-spinand-Add-spi_mem_poll_status-support/20210507-211933
        git checkout 7f27dc0ce5a74374bac3b33a0e77098ad6465ab8
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross W=1 ARCH=arc 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

All errors (new ones prefixed by >>):

   arc-elf-ld: lib/stackdepot.o: in function `filter_irq_stacks':
   stackdepot.c:(.text+0x3d2): undefined reference to `__irqentry_text_start'
   arc-elf-ld: stackdepot.c:(.text+0x3d2): undefined reference to `__irqentry_text_start'
   arc-elf-ld: stackdepot.c:(.text+0x3da): undefined reference to `__irqentry_text_end'
   arc-elf-ld: stackdepot.c:(.text+0x3da): undefined reference to `__irqentry_text_end'
   arc-elf-ld: stackdepot.c:(.text+0x3e2): undefined reference to `__softirqentry_text_start'
   arc-elf-ld: stackdepot.c:(.text+0x3e2): undefined reference to `__softirqentry_text_start'
   arc-elf-ld: stackdepot.c:(.text+0x3ea): undefined reference to `__softirqentry_text_end'
   arc-elf-ld: stackdepot.c:(.text+0x3ea): undefined reference to `__softirqentry_text_end'
   arc-elf-ld: drivers/spi/spi-stm32-qspi.o: in function `stm32_qspi_send.isra.0':
   spi-stm32-qspi.c:(.text+0x39a): undefined reference to `spi_mem_finalize_op'
>> arc-elf-ld: spi-stm32-qspi.c:(.text+0x39a): undefined reference to `spi_mem_finalize_op'

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org