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Subject[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'
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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