[hare-scsi-devel:auth.v12 10/11] <command-line>: warning: format '%lu' expects argument of type 'long unsigned int', but argument 9 has type 'size_t' {aka 'unsigned int'}

[kernel test robot]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/hare/scsi-devel.git auth.v12
head:   94e00927012f48bfff384a6e5e40d8e6a34a1ae5
commit: e858b89b4b9d5cbe4d533c16feaf4c5bfca10e5b [10/11] nvmet-auth: Diffie-Hellman key exchange support
config: m68k-allyesconfig (https://download.01.org/0day-ci/archive/20220519/202205190200.Z1ecsIW1-lkp@xxxxxxxxx/config)
compiler: m68k-linux-gcc (GCC) 11.3.0
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/hare/scsi-devel.git/commit/?id=e858b89b4b9d5cbe4d533c16feaf4c5bfca10e5b
        git remote add hare-scsi-devel https://git.kernel.org/pub/scm/linux/kernel/git/hare/scsi-devel.git
        git fetch --no-tags hare-scsi-devel auth.v12
        git checkout e858b89b4b9d5cbe4d533c16feaf4c5bfca10e5b
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.3.0 make.cross W=1 O=build_dir ARCH=m68k SHELL=/bin/bash drivers/nvme/target/

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

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:371:9: note: in expansion of macro 'pr_debug'
     371 |         pr_debug("%s: ctrl %d qid %d seq %d transaction %d hl %d dhvlen %lu\n",
         |         ^~~~~~~~

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