tree:   https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
head:   b36c969764ab12faebb74711c942fa3e6eaf1e96
commit: c05210ab975771e161427eb47696b869d820bdaf [2248/3958] drivers: optee: allow op-tee to access devices on the i2c bus
config: arm-randconfig-r002-20200830 (attached as .config)
compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project c10e63677f5d20f18010f8f68c631ddc97546f7d)
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
        # install arm cross compiling tool for clang build
        # apt-get install binutils-arm-linux-gnueabi
        git checkout c05210ab975771e161427eb47696b869d820bdaf
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=arm 

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 >>):

>> ld.lld: error: undefined symbol: i2c_get_adapter
   >>> referenced by rpc.c:88 (drivers/tee/optee/rpc.c:88)
   >>> tee/optee/rpc.o:(optee_handle_rpc) in archive drivers/built-in.a
--
>> ld.lld: error: undefined symbol: i2c_transfer_buffer_flags
   >>> referenced by rpc.c:105 (drivers/tee/optee/rpc.c:105)
   >>> tee/optee/rpc.o:(optee_handle_rpc) in archive drivers/built-in.a
--
>> ld.lld: error: undefined symbol: i2c_put_adapter
   >>> referenced by rpc.c:115 (drivers/tee/optee/rpc.c:115)
   >>> tee/optee/rpc.o:(optee_handle_rpc) in archive drivers/built-in.a
   >>> referenced by rpc.c:129 (drivers/tee/optee/rpc.c:129)
   >>> tee/optee/rpc.o:(optee_handle_rpc) in archive drivers/built-in.a

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

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