[mcgrof-next:20211116-sysctl-cleanups-v3 9/20] drivers/char/hpet.c:1044:16: warning: incompatible integer to pointer conversion assigning to 'struct ctl_table_header *' from 'int'

[mcgrof-next:20211116-sysctl-cleanups-v3 9/20] drivers/char/hpet.c:1044:16: warning: incompatible integer to pointer conversion assigning to 'struct ctl_table_header *' from 'int'

[kernel test robot]

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tree:   https://git.kernel.org/pub/scm/linux/kernel/git/mcgrof/linux-next.git 20211116-sysctl-cleanups-v3
head:   06113f1d9a2d0669964adfa2e0128bd50e56b621
commit: 766042fb8971eaa61f89cdf9b340e602ad6bc7ef [9/20] hpet: use new sysctl subdir helper register_sysctl_subdir()
config: x86_64-randconfig-a001-20211116 (attached as .config)
compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 4c2cf3a314d9131b1b288e7c8ab0c75ac1b2be1d)
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/mcgrof/linux-next.git/commit/?id=766042fb8971eaa61f89cdf9b340e602ad6bc7ef
        git remote add mcgrof-next https://git.kernel.org/pub/scm/linux/kernel/git/mcgrof/linux-next.git
        git fetch --no-tags mcgrof-next 20211116-sysctl-cleanups-v3
        git checkout 766042fb8971eaa61f89cdf9b340e602ad6bc7ef
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 ARCH=x86_64 

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/char/hpet.c:1044:18: error: implicit declaration of function 'register_sysctl_subdir' [-Werror,-Wimplicit-function-declaration]
           sysctl_header = register_sysctl_subdir("dev", "hpet", hpet_table);
                           ^
>> drivers/char/hpet.c:1044:16: warning: incompatible integer to pointer conversion assigning to 'struct ctl_table_header *' from 'int' [-Wint-conversion]
           sysctl_header = register_sysctl_subdir("dev", "hpet", hpet_table);
                         ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   1 warning and 1 error generated.


vim +1044 drivers/char/hpet.c

  1035	
  1036	static int __init hpet_init(void)
  1037	{
  1038		int result;
  1039	
  1040		result = misc_register(&hpet_misc);
  1041		if (result < 0)
  1042			return -ENODEV;
  1043	
> 1044		sysctl_header = register_sysctl_subdir("dev", "hpet", hpet_table);
  1045	
  1046		result = acpi_bus_register_driver(&hpet_acpi_driver);
  1047		if (result < 0) {
  1048			if (sysctl_header)
  1049				unregister_sysctl_table(sysctl_header);
  1050			misc_deregister(&hpet_misc);
  1051			return result;
  1052		}
  1053	
  1054		return 0;
  1055	}
  1056	device_initcall(hpet_init);
  1057	

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

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