tree:   https://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio.git testing
head:   301f7eba67df8868cb22b0ba2af0fc0cdfe70d8a
commit: af959b7b96b87aee13ed5b0041fc14ca2e72cc84 [86/168] iio: accel: fxls8962af: fix errata bug E3 - I2C burst reads
config: xtensa-randconfig-r025-20210524 (attached as .config)
compiler: xtensa-linux-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://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio.git/commit/?id=af959b7b96b87aee13ed5b0041fc14ca2e72cc84
        git remote add iio https://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio.git
        git fetch --no-tags iio testing
        git checkout af959b7b96b87aee13ed5b0041fc14ca2e72cc84
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=xtensa 

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 >>):

   xtensa-linux-ld: drivers/iio/accel/fxls8962af-core.o: in function `fxls8962af_core_probe':
>> fxls8962af-core.c:(.text+0x8d4): undefined reference to `i2c_verify_client'
   xtensa-linux-ld: drivers/iio/accel/fxls8962af-core.o: in function `fxls8962af_fifo_flush':
   fxls8962af-core.c:(.text+0x9c4): undefined reference to `i2c_verify_client'

Kconfig warnings: (for reference only)
   WARNING: unmet direct dependencies detected for LOCKDEP
   Depends on DEBUG_KERNEL && LOCK_DEBUGGING_SUPPORT && (FRAME_POINTER || MIPS || PPC || S390 || MICROBLAZE || ARM || ARC || X86)
   Selected by
   - DEBUG_LOCK_ALLOC && DEBUG_KERNEL && LOCK_DEBUGGING_SUPPORT

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