Re: [PATCH v2 1/3] PM/OPP: Support to match OPP based on both frequency and level.

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

Hi Krishna,

kernel test robot noticed the following build warnings:

[auto build test WARNING on c17b750b3ad9f45f2b6f7e6f7f4679844244f0b9]

url:    https://github.com/intel-lab-lkp/linux/commits/Krishna-Chaitanya-Chundru/PM-OPP-Support-to-match-OPP-based-on-both-frequency-and-level/20250818-162759
base:   c17b750b3ad9f45f2b6f7e6f7f4679844244f0b9
patch link:    https://lore.kernel.org/r/20250818-opp_pcie-v2-1-071524d98967%40oss.qualcomm.com
patch subject: [PATCH v2 1/3] PM/OPP: Support to match OPP based on both frequency and level.
config: x86_64-allnoconfig (https://download.01.org/0day-ci/archive/20250819/202508190743.lszMYiro-lkp@intel.com/config)
compiler: clang version 20.1.8 (https://github.com/llvm/llvm-project 87f0227cb60147a26a1eeb4fb06e3b505e9c7261)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250819/202508190743.lszMYiro-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/202508190743.lszMYiro-lkp@intel.com/

All warnings (new ones prefixed by >>):

   In file included from kernel/sched/core.c:89:
   In file included from kernel/sched/sched.h:31:
   In file included from include/linux/cpufreq.h:18:
>> include/linux/pm_opp.h:297:20: warning: no previous prototype for function 'dev_pm_opp_find_freq_level_exact' [-Wmissing-prototypes]
     297 | struct dev_pm_opp *dev_pm_opp_find_freq_level_exact(struct device *dev,
         |                    ^
   include/linux/pm_opp.h:297:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
     297 | struct dev_pm_opp *dev_pm_opp_find_freq_level_exact(struct device *dev,
         | ^
         | static 
   kernel/sched/core.c:2445:20: warning: unused function 'rq_has_pinned_tasks' [-Wunused-function]
    2445 | static inline bool rq_has_pinned_tasks(struct rq *rq)
         |                    ^~~~~~~~~~~~~~~~~~~
   kernel/sched/core.c:5795:20: warning: unused function 'sched_tick_stop' [-Wunused-function]
    5795 | static inline void sched_tick_stop(int cpu) { }
         |                    ^~~~~~~~~~~~~~~
   kernel/sched/core.c:6514:20: warning: unused function 'sched_core_cpu_deactivate' [-Wunused-function]
    6514 | static inline void sched_core_cpu_deactivate(unsigned int cpu) {}
         |                    ^~~~~~~~~~~~~~~~~~~~~~~~~
   kernel/sched/core.c:6515:20: warning: unused function 'sched_core_cpu_dying' [-Wunused-function]
    6515 | static inline void sched_core_cpu_dying(unsigned int cpu) {}
         |                    ^~~~~~~~~~~~~~~~~~~~
   kernel/sched/core.c:8305:20: warning: unused function 'balance_hotplug_wait' [-Wunused-function]
    8305 | static inline void balance_hotplug_wait(void)
         |                    ^~~~~~~~~~~~~~~~~~~~
   6 warnings generated.
--
   In file included from kernel/sched/fair.c:57:
   In file included from kernel/sched/sched.h:31:
   In file included from include/linux/cpufreq.h:18:
>> include/linux/pm_opp.h:297:20: warning: no previous prototype for function 'dev_pm_opp_find_freq_level_exact' [-Wmissing-prototypes]
     297 | struct dev_pm_opp *dev_pm_opp_find_freq_level_exact(struct device *dev,
         |                    ^
   include/linux/pm_opp.h:297:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
     297 | struct dev_pm_opp *dev_pm_opp_find_freq_level_exact(struct device *dev,
         | ^
         | static 
   kernel/sched/fair.c:482:20: warning: unused function 'list_del_leaf_cfs_rq' [-Wunused-function]
     482 | static inline void list_del_leaf_cfs_rq(struct cfs_rq *cfs_rq)
         |                    ^~~~~~~~~~~~~~~~~~~~
   kernel/sched/fair.c:503:19: warning: unused function 'tg_is_idle' [-Wunused-function]
     503 | static inline int tg_is_idle(struct task_group *tg)
         |                   ^~~~~~~~~~
   kernel/sched/fair.c:3997:20: warning: unused function 'load_avg_is_decayed' [-Wunused-function]
    3997 | static inline bool load_avg_is_decayed(struct sched_avg *sa)
         |                    ^~~~~~~~~~~~~~~~~~~
   kernel/sched/fair.c:6640:20: warning: unused function 'sync_throttle' [-Wunused-function]
    6640 | static inline void sync_throttle(struct task_group *tg, int cpu) {}
         |                    ^~~~~~~~~~~~~
   kernel/sched/fair.c:6664:37: warning: unused function 'tg_cfs_bandwidth' [-Wunused-function]
    6664 | static inline struct cfs_bandwidth *tg_cfs_bandwidth(struct task_group *tg)
         |                                     ^~~~~~~~~~~~~~~~
   kernel/sched/fair.c:6668:20: warning: unused function 'destroy_cfs_bandwidth' [-Wunused-function]
    6668 | static inline void destroy_cfs_bandwidth(struct cfs_bandwidth *cfs_b) {}
         |                    ^~~~~~~~~~~~~~~~~~~~~
   kernel/sched/fair.c:9991:20: warning: unused function 'check_misfit_status' [-Wunused-function]
     9991 | static inline bool check_misfit_status(struct rq *rq)
          |                    ^~~~~~~~~~~~~~~~~~~
   8 warnings generated.
--
   In file included from kernel/sched/build_policy.c:41:
   In file included from kernel/sched/sched.h:31:
   In file included from include/linux/cpufreq.h:18:
>> include/linux/pm_opp.h:297:20: warning: no previous prototype for function 'dev_pm_opp_find_freq_level_exact' [-Wmissing-prototypes]
     297 | struct dev_pm_opp *dev_pm_opp_find_freq_level_exact(struct device *dev,
         |                    ^
   include/linux/pm_opp.h:297:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
     297 | struct dev_pm_opp *dev_pm_opp_find_freq_level_exact(struct device *dev,
         | ^
         | static 
   1 warning generated.


vim +/dev_pm_opp_find_freq_level_exact +297 include/linux/pm_opp.h

   296	
 > 297	struct dev_pm_opp *dev_pm_opp_find_freq_level_exact(struct device *dev,
   298							    unsigned long freq,
   299							    unsigned int level,
   300							    bool available)
   301	{
   302		return ERR_PTR(-EOPNOTSUPP);
   303	}
   304	

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