Hi Avri,

[FYI, it's a private test report for your RFC patch.]
[auto build test ERROR on scsi/for-next]
[cannot apply to mkp-scsi/for-next v5.7-rc5]
[if your patch is applied to the wrong git tree, please drop us a note to help
improve the system. BTW, we also suggest to use '--base' option to specify the
base tree in git format-patch, please see https://stackoverflow.com/a/37406982]

url:    https://github.com/0day-ci/linux/commits/Avri-Altman/scsi-ufs-Add-HPB-Support/20200515-183602
base:   https://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi.git for-next
config: ia64-allmodconfig (attached as .config)
compiler: ia64-linux-gcc (GCC) 9.3.0
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day GCC_VERSION=9.3.0 make.cross ARCH=ia64 

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

All errors (new ones prefixed by >>, old ones prefixed by <<):

ia64-linux-ld: drivers/scsi/device_handler/scsi_dh_ufshpb.o: in function `ufshpb_attach':
>> scsi_dh_ufshpb.c:(.text+0x102): undefined reference to `sdev_prefix_printk'
ia64-linux-ld: drivers/scsi/device_handler/scsi_dh_ufshpb.o: in function `ufshpb_init':
>> scsi_dh_ufshpb.c:(.init.text+0x22): undefined reference to `scsi_register_device_handler'

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