Re: [PATCH 1/3] proc: Add get_task_cmdline_kernel() function

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

Hi Helge,

I love your patch! Perhaps something to improve:

[auto build test WARNING on tip/x86/mm]
[also build test WARNING on linus/master]
[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/Helge-Deller/Dump-command-line-of-faulting-process-to-syslog/20220801-232209
base:   https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git 8f1d56f64f8d6b80dea2d1978d10071132a695c5
config: hexagon-randconfig-r005-20220801 (https://download.01.org/0day-ci/archive/20220807/202208072219.zrLROtui-lkp@intel.com/config)
compiler: clang version 16.0.0 (https://github.com/llvm/llvm-project 52cd00cabf479aa7eb6dbb063b7ba41ea57bce9e)
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://github.com/intel-lab-lkp/linux/commit/82149c3c87cadf0a362c3015753f97c7582f31e4
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Helge-Deller/Dump-command-line-of-faulting-process-to-syslog/20220801-232209
        git checkout 82149c3c87cadf0a362c3015753f97c7582f31e4
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=hexagon SHELL=/bin/bash kernel/sched/

If you fix the issue, kindly add following tag where applicable
Reported-by: kernel test robot <lkp@intel.com>

All warnings (new ones prefixed by >>):

   In file included from kernel/sched/core.c:84:
   In file included from kernel/sched/sched.h:50:
>> include/linux/proc_fs.h:222:64: warning: omitting the parameter name in a function definition is a C2x extension [-Wc2x-extensions]
   static inline void get_task_cmdline_kernel(struct task_struct *, char *, size_t) { }
                                                                  ^
   include/linux/proc_fs.h:222:72: warning: omitting the parameter name in a function definition is a C2x extension [-Wc2x-extensions]
   static inline void get_task_cmdline_kernel(struct task_struct *, char *, size_t) { }
                                                                          ^
   include/linux/proc_fs.h:222:80: warning: omitting the parameter name in a function definition is a C2x extension [-Wc2x-extensions]
   static inline void get_task_cmdline_kernel(struct task_struct *, char *, size_t) { }
                                                                                  ^
   kernel/sched/core.c:3577:20: warning: unused function 'rq_has_pinned_tasks' [-Wunused-function]
   static inline bool rq_has_pinned_tasks(struct rq *rq)
                      ^
   kernel/sched/core.c:5505:20: warning: unused function 'sched_tick_start' [-Wunused-function]
   static inline void sched_tick_start(int cpu) { }
                      ^
   kernel/sched/core.c:5506:20: warning: unused function 'sched_tick_stop' [-Wunused-function]
   static inline void sched_tick_stop(int cpu) { }
                      ^
   kernel/sched/core.c:6200:20: warning: unused function 'sched_core_cpu_starting' [-Wunused-function]
   static inline void sched_core_cpu_starting(unsigned int cpu) {}
                      ^
   kernel/sched/core.c:6201:20: warning: unused function 'sched_core_cpu_deactivate' [-Wunused-function]
   static inline void sched_core_cpu_deactivate(unsigned int cpu) {}
                      ^
   kernel/sched/core.c:6202:20: warning: unused function 'sched_core_cpu_dying' [-Wunused-function]
   static inline void sched_core_cpu_dying(unsigned int cpu) {}
                      ^
   9 warnings generated.
--
   In file included from kernel/sched/fair.c:54:
   In file included from kernel/sched/sched.h:50:
>> include/linux/proc_fs.h:222:64: warning: omitting the parameter name in a function definition is a C2x extension [-Wc2x-extensions]
   static inline void get_task_cmdline_kernel(struct task_struct *, char *, size_t) { }
                                                                  ^
   include/linux/proc_fs.h:222:72: warning: omitting the parameter name in a function definition is a C2x extension [-Wc2x-extensions]
   static inline void get_task_cmdline_kernel(struct task_struct *, char *, size_t) { }
                                                                          ^
   include/linux/proc_fs.h:222:80: warning: omitting the parameter name in a function definition is a C2x extension [-Wc2x-extensions]
   static inline void get_task_cmdline_kernel(struct task_struct *, char *, size_t) { }
                                                                                  ^
   kernel/sched/fair.c:5512:6: warning: no previous prototype for function 'init_cfs_bandwidth' [-Wmissing-prototypes]
   void init_cfs_bandwidth(struct cfs_bandwidth *cfs_b) {}
        ^
   kernel/sched/fair.c:5512:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   void init_cfs_bandwidth(struct cfs_bandwidth *cfs_b) {}
   ^
   static 
   kernel/sched/fair.c:11697:6: warning: no previous prototype for function 'free_fair_sched_group' [-Wmissing-prototypes]
   void free_fair_sched_group(struct task_group *tg) { }
        ^
   kernel/sched/fair.c:11697:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   void free_fair_sched_group(struct task_group *tg) { }
   ^
   static 
   kernel/sched/fair.c:11699:5: warning: no previous prototype for function 'alloc_fair_sched_group' [-Wmissing-prototypes]
   int alloc_fair_sched_group(struct task_group *tg, struct task_group *parent)
       ^
   kernel/sched/fair.c:11699:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   int alloc_fair_sched_group(struct task_group *tg, struct task_group *parent)
   ^
   static 
   kernel/sched/fair.c:11704:6: warning: no previous prototype for function 'online_fair_sched_group' [-Wmissing-prototypes]
   void online_fair_sched_group(struct task_group *tg) { }
        ^
   kernel/sched/fair.c:11704:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   void online_fair_sched_group(struct task_group *tg) { }
   ^
   static 
   kernel/sched/fair.c:11706:6: warning: no previous prototype for function 'unregister_fair_sched_group' [-Wmissing-prototypes]
   void unregister_fair_sched_group(struct task_group *tg) { }
        ^
   kernel/sched/fair.c:11706:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   void unregister_fair_sched_group(struct task_group *tg) { }
   ^
   static 
   kernel/sched/fair.c:489:20: warning: unused function 'list_del_leaf_cfs_rq' [-Wunused-function]
   static inline void list_del_leaf_cfs_rq(struct cfs_rq *cfs_rq)
                      ^
   kernel/sched/fair.c:510:19: warning: unused function 'tg_is_idle' [-Wunused-function]
   static inline int tg_is_idle(struct task_group *tg)
                     ^
   kernel/sched/fair.c:2961:20: warning: unused function 'account_numa_enqueue' [-Wunused-function]
   static inline void account_numa_enqueue(struct rq *rq, struct task_struct *p)
                      ^
   kernel/sched/fair.c:2965:20: warning: unused function 'account_numa_dequeue' [-Wunused-function]
   static inline void account_numa_dequeue(struct rq *rq, struct task_struct *p)
                      ^
   kernel/sched/fair.c:2969:20: warning: unused function 'update_scan_period' [-Wunused-function]
   static inline void update_scan_period(struct task_struct *p, int new_cpu)
                      ^
   kernel/sched/fair.c:4171:20: warning: unused function 'cfs_rq_is_decayed' [-Wunused-function]
   static inline bool cfs_rq_is_decayed(struct cfs_rq *cfs_rq)
                      ^
   kernel/sched/fair.c:4185:20: warning: unused function 'remove_entity_load_avg' [-Wunused-function]
   static inline void remove_entity_load_avg(struct sched_entity *se) {}
                      ^
   kernel/sched/fair.c:5493:20: warning: unused function 'sync_throttle' [-Wunused-function]
   static inline void sync_throttle(struct task_group *tg, int cpu) {}
                      ^
   kernel/sched/fair.c:5506:19: warning: unused function 'throttled_lb_pair' [-Wunused-function]
   static inline int throttled_lb_pair(struct task_group *tg,
                     ^
   kernel/sched/fair.c:5518:37: warning: unused function 'tg_cfs_bandwidth' [-Wunused-function]
   static inline struct cfs_bandwidth *tg_cfs_bandwidth(struct task_group *tg)
                                       ^
   kernel/sched/fair.c:5522:20: warning: unused function 'destroy_cfs_bandwidth' [-Wunused-function]
   static inline void destroy_cfs_bandwidth(struct cfs_bandwidth *cfs_b) {}
                      ^
   kernel/sched/fair.c:5523:20: warning: unused function 'update_runtime_enabled' [-Wunused-function]
   static inline void update_runtime_enabled(struct rq *rq) {}
                      ^
   kernel/sched/fair.c:5524:20: warning: unused function 'unthrottle_offline_cfs_rqs' [-Wunused-function]
   static inline void unthrottle_offline_cfs_rqs(struct rq *rq) {}
                      ^
   21 warnings generated.
--
   In file included from kernel/sched/build_policy.c:34:
   In file included from kernel/sched/sched.h:50:
>> include/linux/proc_fs.h:222:64: warning: omitting the parameter name in a function definition is a C2x extension [-Wc2x-extensions]
   static inline void get_task_cmdline_kernel(struct task_struct *, char *, size_t) { }
                                                                  ^
   include/linux/proc_fs.h:222:72: warning: omitting the parameter name in a function definition is a C2x extension [-Wc2x-extensions]
   static inline void get_task_cmdline_kernel(struct task_struct *, char *, size_t) { }
                                                                          ^
   include/linux/proc_fs.h:222:80: warning: omitting the parameter name in a function definition is a C2x extension [-Wc2x-extensions]
   static inline void get_task_cmdline_kernel(struct task_struct *, char *, size_t) { }
                                                                                  ^
   In file included from kernel/sched/build_policy.c:45:
   kernel/sched/rt.c:259:6: warning: no previous prototype for function 'unregister_rt_sched_group' [-Wmissing-prototypes]
   void unregister_rt_sched_group(struct task_group *tg) { }
        ^
   kernel/sched/rt.c:259:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   void unregister_rt_sched_group(struct task_group *tg) { }
   ^
   static 
   kernel/sched/rt.c:261:6: warning: no previous prototype for function 'free_rt_sched_group' [-Wmissing-prototypes]
   void free_rt_sched_group(struct task_group *tg) { }
        ^
   kernel/sched/rt.c:261:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   void free_rt_sched_group(struct task_group *tg) { }
   ^
   static 
   kernel/sched/rt.c:263:5: warning: no previous prototype for function 'alloc_rt_sched_group' [-Wmissing-prototypes]
   int alloc_rt_sched_group(struct task_group *tg, struct task_group *parent)
       ^
   kernel/sched/rt.c:263:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   int alloc_rt_sched_group(struct task_group *tg, struct task_group *parent)
   ^
   static 
   6 warnings generated.
--
   In file included from kernel/sched/build_utility.c:35:
>> include/linux/proc_fs.h:222:64: warning: omitting the parameter name in a function definition is a C2x extension [-Wc2x-extensions]
   static inline void get_task_cmdline_kernel(struct task_struct *, char *, size_t) { }
                                                                  ^
   include/linux/proc_fs.h:222:72: warning: omitting the parameter name in a function definition is a C2x extension [-Wc2x-extensions]
   static inline void get_task_cmdline_kernel(struct task_struct *, char *, size_t) { }
                                                                          ^
   include/linux/proc_fs.h:222:80: warning: omitting the parameter name in a function definition is a C2x extension [-Wc2x-extensions]
   static inline void get_task_cmdline_kernel(struct task_struct *, char *, size_t) { }
                                                                                  ^
   3 warnings generated.


vim +222 include/linux/proc_fs.h

   221	
 > 222	static inline void get_task_cmdline_kernel(struct task_struct *, char *, size_t) { }
   223	

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