Hi Dipen,

[FYI, it's a private test report for your RFC patch.]
[auto build test ERROR on robh/for-next]
[also build test ERROR on linux/master linus/master gpio/for-next v5.13-rc7 next-20210625]
[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/Dipen-Patel/Intro-to-Hardware-timestamping-engine/20210626-074917
base:   https://git.kernel.org/pub/scm/linux/kernel/git/robh/linux.git for-next
config: m68k-allmodconfig (attached as .config)
compiler: m68k-linux-gcc (GCC) 9.3.0
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://github.com/0day-ci/linux/commit/887b08c0d50d454bf7c9624afa13c28fe522c977
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Dipen-Patel/Intro-to-Hardware-timestamping-engine/20210626-074917
        git checkout 887b08c0d50d454bf7c9624afa13c28fe522c977
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=m68k 

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 >>):

   In file included from include/linux/printk.h:6,
                    from include/linux/kernel.h:17,
                    from drivers/hte/hte.c:8:
>> drivers/hte/hte.c:298:17: error: initialization of 'initcall_t' {aka 'int (*)(void)'} from incompatible pointer type 'void (*)(void)' [-Werror=incompatible-pointer-types]
     298 | subsys_initcall(hte_subsys_dbgfs_init);
         |                 ^~~~~~~~~~~~~~~~~~~~~
   include/linux/init.h:249:41: note: in definition of macro '____define_initcall'
     249 |   __attribute__((__section__(__sec))) = fn;
         |                                         ^~
   include/linux/init.h:259:2: note: in expansion of macro '__unique_initcall'
     259 |  __unique_initcall(fn, id, __sec, __initcall_id(fn))
         |  ^~~~~~~~~~~~~~~~~
   include/linux/init.h:261:35: note: in expansion of macro '___define_initcall'
     261 | #define __define_initcall(fn, id) ___define_initcall(fn, id, .initcall##id)
         |                                   ^~~~~~~~~~~~~~~~~~
   include/linux/init.h:285:30: note: in expansion of macro '__define_initcall'
     285 | #define subsys_initcall(fn)  __define_initcall(fn, 4)
         |                              ^~~~~~~~~~~~~~~~~
   drivers/hte/hte.c:298:1: note: in expansion of macro 'subsys_initcall'
     298 | subsys_initcall(hte_subsys_dbgfs_init);
         | ^~~~~~~~~~~~~~~
   In file included from include/linux/kernel.h:17,
                    from drivers/hte/hte.c:8:
   drivers/hte/hte.c: In function 'hte_para_check':
   drivers/hte/hte.c:827:12: warning: format '%lu' expects argument of type 'long unsigned int', but argument 5 has type 'size_t' {aka 'unsigned int'} [-Wformat=]
     827 |   pr_debug("%s:%d: val :%lu\n", __func__, __LINE__, val);
         |            ^~~~~~~~~~~~~~~~~~~
   include/linux/printk.h:301:21: note: in definition of macro 'pr_fmt'
     301 | #define pr_fmt(fmt) fmt
         |                     ^~~
   include/linux/dynamic_debug.h:147:2: note: in expansion of macro '__dynamic_func_call'
     147 |  __dynamic_func_call(__UNIQUE_ID(ddebug), fmt, func, ##__VA_ARGS__)
         |  ^~~~~~~~~~~~~~~~~~~
   include/linux/dynamic_debug.h:157:2: note: in expansion of macro '_dynamic_func_call'
     157 |  _dynamic_func_call(fmt, __dynamic_pr_debug,  \
         |  ^~~~~~~~~~~~~~~~~~
   include/linux/printk.h:424:2: note: in expansion of macro 'dynamic_pr_debug'
     424 |  dynamic_pr_debug(fmt, ##__VA_ARGS__)
         |  ^~~~~~~~~~~~~~~~
   drivers/hte/hte.c:827:3: note: in expansion of macro 'pr_debug'
     827 |   pr_debug("%s:%d: val :%lu\n", __func__, __LINE__, val);
         |   ^~~~~~~~
   drivers/hte/hte.c:827:27: note: format string is defined here
     827 |   pr_debug("%s:%d: val :%lu\n", __func__, __LINE__, val);
         |                         ~~^
         |                           |
         |                           long unsigned int
         |                         %u
   drivers/hte/hte.c: In function 'hte_add_to_device_list':
   drivers/hte/hte.c:1180:21: warning: variable 'prev' set but not used [-Wunused-but-set-variable]
    1180 |  struct hte_device *prev;
         |                     ^~~~
   cc1: some warnings being treated as errors


vim +298 drivers/hte/hte.c

   292	
   293	static void __init hte_subsys_dbgfs_init(void)
   294	{
   295		/* creates /sys/kernel/debug/hte/ */
   296		hte_root = debugfs_create_dir("hte", NULL);
   297	}
 > 298	subsys_initcall(hte_subsys_dbgfs_init);
   299	

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