Re: [PATCH RFC 1/4] bpf: add cgroup device guard to flag a cgroup device prog

[kernel test robot <lkp@intel.com>]

Hi Michael,

[This is a private test report for your RFC patch.]
kernel test robot noticed the following build warnings:

[auto build test WARNING on 2ccdd1b13c591d306f0401d98dedc4bdcd02b421]

url:    https://github.com/intel-lab-lkp/linux/commits/Michael-Wei/bpf-add-cgroup-device-guard-to-flag-a-cgroup-device-prog/20230814-224110
base:   2ccdd1b13c591d306f0401d98dedc4bdcd02b421
patch link:    https://lore.kernel.org/r/20230814-devcg_guard-v1-1-654971ab88b1%40aisec.fraunhofer.de
patch subject: [PATCH RFC 1/4] bpf: add cgroup device guard to flag a cgroup device prog
config: x86_64-allnoconfig (https://download.01.org/0day-ci/archive/20230815/202308150203.98NTfbl9-lkp@intel.com/config)
compiler: gcc-12 (Debian 12.2.0-14) 12.2.0
reproduce: (https://download.01.org/0day-ci/archive/20230815/202308150203.98NTfbl9-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202308150203.98NTfbl9-lkp@intel.com/

All warnings (new ones prefixed by >>):

   In file included from fs/proc/proc_sysctl.c:17:
>> include/linux/bpf-cgroup.h:481:13: warning: 'cgroup_bpf_device_guard_enabled' defined but not used [-Wunused-function]
     481 | static bool cgroup_bpf_device_guard_enabled(struct task_struct *task)
         |             ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~


vim +/cgroup_bpf_device_guard_enabled +481 include/linux/bpf-cgroup.h

   480	
 > 481	static bool cgroup_bpf_device_guard_enabled(struct task_struct *task)
   482	{
   483		return false;
   484	}
   485	

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