Hi Hannes,

I love your patch! Perhaps something to improve:

[auto build test WARNING on herbert-cryptodev-2.6/master]
[also build test WARNING on linus/master v5.16-rc2 next-20211123]
[cannot apply to herbert-crypto-2.6/master linux-nvme/for-next]
[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/Hannes-Reinecke/nvme-In-band-authentication-support/20211123-204008
base:   https://git.kernel.org/pub/scm/linux/kernel/git/herbert/cryptodev-2.6.git master
config: mips-allmodconfig (https://download.01.org/0day-ci/archive/20211123/202111232322.YNIOiBE1-lkp(a)intel.com/config.gz)
compiler: mips-linux-gcc (GCC) 11.2.0
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/34bd34a0ee0dbaeeb36f3264e50be3a533491d97
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Hannes-Reinecke/nvme-In-band-authentication-support/20211123-204008
        git checkout 34bd34a0ee0dbaeeb36f3264e50be3a533491d97
        # save the config file to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross ARCH=mips 

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

All warnings (new ones prefixed by >>):

   drivers/nvme/target/fabrics-cmd-auth.c: In function 'nvmet_auth_challenge':
>> <command-line>: warning: format '%lu' expects argument of type 'long unsigned int', but argument 9 has type 'size_t' {aka 'unsigned int'} [-Wformat=]
   drivers/nvme/target/fabrics-cmd-auth.c:7:21: note: in expansion of macro 'KBUILD_MODNAME'
       7 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
         |                     ^~~~~~~~~~~~~~
   include/linux/dynamic_debug.h:134:29: note: in expansion of macro 'pr_fmt'
     134 |                 func(&id, ##__VA_ARGS__);               \
         |                             ^~~~~~~~~~~
   include/linux/dynamic_debug.h:152:9: note: in expansion of macro '__dynamic_func_call'
     152 |         __dynamic_func_call(__UNIQUE_ID(ddebug), fmt, func, ##__VA_ARGS__)
         |         ^~~~~~~~~~~~~~~~~~~
   include/linux/dynamic_debug.h:162:9: note: in expansion of macro '_dynamic_func_call'
     162 |         _dynamic_func_call(fmt, __dynamic_pr_debug,             \
         |         ^~~~~~~~~~~~~~~~~~
   include/linux/printk.h:570:9: note: in expansion of macro 'dynamic_pr_debug'
     570 |         dynamic_pr_debug(fmt, ##__VA_ARGS__)
         |         ^~~~~~~~~~~~~~~~
   drivers/nvme/target/fabrics-cmd-auth.c:350:9: note: in expansion of macro 'pr_debug'
     350 |         pr_debug("%s: ctrl %d qid %d seq %d transaction %d hl %d dhvlen %lu\n",
         |         ^~~~~~~~

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