linux-kernel - Re: [PATCH v5 05/10] PM: EM: Add an iterator and accessor for the performance domain

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Message-ID: <202510151232.UNZ2J7TZ-lkp@intel.com>
Date: Wed, 15 Oct 2025 12:49:54 +0800
From: kernel test robot <lkp@...el.com>
To: Changwoo Min <changwoo@...lia.com>, lukasz.luba@....com,
	rafael@...nel.org, len.brown@...el.com, pavel@...nel.org
Cc: oe-kbuild-all@...ts.linux.dev, christian.loehle@....com, tj@...nel.org,
	kernel-dev@...lia.com, linux-pm@...r.kernel.org,
	sched-ext@...ts.linux.dev, linux-kernel@...r.kernel.org,
	Changwoo Min <changwoo@...lia.com>
Subject: Re: [PATCH v5 05/10] PM: EM: Add an iterator and accessor for the
 performance domain

Hi Changwoo,

kernel test robot noticed the following build errors:

[auto build test ERROR on amd-pstate/linux-next]
[also build test ERROR on amd-pstate/bleeding-edge linus/master v6.18-rc1 next-20251014]
[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#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Changwoo-Min/PM-EM-Assign-a-unique-ID-when-creating-a-performance-domain/20251014-082420
base:   https://git.kernel.org/pub/scm/linux/kernel/git/superm1/linux.git linux-next
patch link:    https://lore.kernel.org/r/20251014001055.772422-6-changwoo%40igalia.com
patch subject: [PATCH v5 05/10] PM: EM: Add an iterator and accessor for the performance domain
config: i386-buildonly-randconfig-001-20251015 (https://download.01.org/0day-ci/archive/20251015/202510151232.UNZ2J7TZ-lkp@intel.com/config)
compiler: gcc-13 (Debian 13.3.0-16) 13.3.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251015/202510151232.UNZ2J7TZ-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@...el.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202510151232.UNZ2J7TZ-lkp@intel.com/

All errors (new ones prefixed by >>):

>> kernel/power/energy_model.c:1003:5: error: redefinition of 'for_each_em_perf_domain'
    1003 | int for_each_em_perf_domain(int (*cb)(struct em_perf_domain*, void *),
         |     ^~~~~~~~~~~~~~~~~~~~~~~
   In file included from kernel/power/energy_model.c:20:
   kernel/power/em_netlink.h:18:5: note: previous definition of 'for_each_em_perf_domain' with type 'int(int (*)(struct em_perf_domain *, void *), void *)'
      18 | int for_each_em_perf_domain(int (*cb)(struct em_perf_domain*, void *),
         |     ^~~~~~~~~~~~~~~~~~~~~~~
>> kernel/power/energy_model.c:1022:24: error: redefinition of 'em_perf_domain_get_by_id'
    1022 | struct em_perf_domain *em_perf_domain_get_by_id(int id)
         |                        ^~~~~~~~~~~~~~~~~~~~~~~~
   kernel/power/em_netlink.h:24:24: note: previous definition of 'em_perf_domain_get_by_id' with type 'struct em_perf_domain *(int)'
      24 | struct em_perf_domain *em_perf_domain_get_by_id(int id)
         |                        ^~~~~~~~~~~~~~~~~~~~~~~~


vim +/for_each_em_perf_domain +1003 kernel/power/energy_model.c

  1002	
> 1003	int for_each_em_perf_domain(int (*cb)(struct em_perf_domain*, void *),
  1004				    void *data)
  1005	{
  1006		struct em_perf_domain *pd;
  1007	
  1008		lockdep_assert_not_held(&em_pd_mutex);
  1009		guard(mutex)(&em_pd_list_mutex);
  1010	
  1011		list_for_each_entry(pd, &em_pd_list, node) {
  1012			int ret;
  1013	
  1014			ret = cb(pd, data);
  1015			if (ret)
  1016				return ret;
  1017		}
  1018	
  1019		return 0;
  1020	}
  1021	
> 1022	struct em_perf_domain *em_perf_domain_get_by_id(int id)

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki