Hi Roman,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on linus/master]
[also build test ERROR on v4.17-rc6 next-20180517]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url:    https://github.com/0day-ci/linux/commits/Roman-Pen/InfiniBand-Transport-IBTRS-and-Network-Block-Device-IBNBD/20180520-222445
config: m68k-allyesconfig (attached as .config)
compiler: m68k-linux-gnu-gcc (Debian 7.2.0-11) 7.2.0
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
        make.cross ARCH=m68k 

All errors (new ones prefixed by >>):

   drivers/mtd/nand/raw/nand_base.o: In function `nand_soft_waitrdy':
   nand_base.c:(.text+0x1022): undefined reference to `__udivdi3'
   drivers/infiniband/ulp/ibtrs/ibtrs-clt-stats.o: In function `ibtrs_clt_stats_wc_completion_to_str':
>> ibtrs-clt-stats.c:(.text+0x172): undefined reference to `__udivdi3'
   drivers/infiniband/ulp/ibtrs/ibtrs-clt-stats.o: In function `ibtrs_clt_stats_sg_list_distr_to_str':
   ibtrs-clt-stats.c:(.text+0x49c): undefined reference to `__udivdi3'

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