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* kernel/sched/core.c:2771:20: warning: unused function 'rq_has_pinned_tasks'
@ 2021-07-03 14:32 ` kernel test robot
  0 siblings, 0 replies; 2+ messages in thread
From: kernel test robot @ 2021-07-03 14:32 UTC (permalink / raw)
  To: Peter Zijlstra
  Cc: clang-built-linux, kbuild-all, linux-kernel, Daniel Bristot de Oliveira

[-- Attachment #1: Type: text/plain, Size: 9978 bytes --]

Hi Peter,

FYI, the error/warning still remains.

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   4b820e167bf6f410ace479d8df5b15a574000e75
commit: a7c81556ec4d341dfdbf2cc478ead89d73e474a7 sched: Fix migrate_disable() vs rt/dl balancing
date:   8 months ago
config: mips-randconfig-r015-20210702 (attached as .config)
compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project 9eb613b2de3163686b1a4bd1160f15ac56a4b083)
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
        # install mips cross compiling tool for clang build
        # apt-get install binutils-mips-linux-gnu
        # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=a7c81556ec4d341dfdbf2cc478ead89d73e474a7
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout a7c81556ec4d341dfdbf2cc478ead89d73e474a7
        # save the attached .config to linux build tree
        mkdir build_dir
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross O=build_dir ARCH=mips SHELL=/bin/bash kernel/locking/ kernel/sched/ kernel/time/ mm/

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 >>):

   kernel/sched/core.c:2711:6: warning: no previous prototype for function 'sched_set_stop_task'
   void sched_set_stop_task(int cpu, struct task_struct
   ^
   kernel/sched/core.c:2711:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   void sched_set_stop_task(int cpu, struct task_struct
   ^
   static
   kernel/sched/core.c:4109:13: warning: variable 'rq' set but not used
   struct rq
   ^
>> kernel/sched/core.c:2771:20: warning: unused function 'rq_has_pinned_tasks'
   static inline bool rq_has_pinned_tasks(struct rq
   ^
   kernel/sched/core.c:4559:20: warning: unused function 'sched_tick_stop'
   static inline void sched_tick_stop(int cpu) { }
   ^
   kernel/sched/core.c:7224:20: warning: unused function 'balance_hotplug_wait'
   static inline void balance_hotplug_wait(void)
   ^
   fatal error: error in backend: Nested variants found in inline asm string: '.if ( 0x00 ) != -1)) 0x00 ) != -1)) : ($( static struct ftrace_branch_data __attribute__((__aligned__(4))) __attribute__((__section__("_ftrace_branch"))) __if_trace = $( .func = __func__, .file = "arch/mips/include/asm/barrier.h", .line = 21, $); 0x00 ) != -1)) : $))) ) && ( (1 << 0) ); .set push; .set mips64r2; .rept 1; sync 0x00; .endr; .set pop; .else; ; .endif'
   clang-13: error: clang frontend command failed with exit code 70 (use -v to see invocation)
   clang version 13.0.0 (git://gitmirror/llvm_project cb5de7c813f976dd458bd2a7f40702ba648bf650)
   Target: mips-unknown-linux-gnu
   Thread model: posix
   InstalledDir: /opt/cross/clang-cb5de7c813/bin
   clang-13: note: diagnostic msg:
   Makefile arch block certs crypto drivers fs include init ipc kernel lib mm scripts security sound source usr virt


vim +/rq_has_pinned_tasks +2771 kernel/sched/core.c

09a40af5240de0 kernel/sched.c      Mike Galbraith  2010-04-15  2710  
f5832c1998af2c kernel/sched/core.c Nicolas Pitre   2017-05-29 @2711  void sched_set_stop_task(int cpu, struct task_struct *stop)
f5832c1998af2c kernel/sched/core.c Nicolas Pitre   2017-05-29  2712  {
ded467dc83ac71 kernel/sched/core.c Peter Zijlstra  2020-10-01  2713  	static struct lock_class_key stop_pi_lock;
f5832c1998af2c kernel/sched/core.c Nicolas Pitre   2017-05-29  2714  	struct sched_param param = { .sched_priority = MAX_RT_PRIO - 1 };
f5832c1998af2c kernel/sched/core.c Nicolas Pitre   2017-05-29  2715  	struct task_struct *old_stop = cpu_rq(cpu)->stop;
f5832c1998af2c kernel/sched/core.c Nicolas Pitre   2017-05-29  2716  
f5832c1998af2c kernel/sched/core.c Nicolas Pitre   2017-05-29  2717  	if (stop) {
f5832c1998af2c kernel/sched/core.c Nicolas Pitre   2017-05-29  2718  		/*
f5832c1998af2c kernel/sched/core.c Nicolas Pitre   2017-05-29  2719  		 * Make it appear like a SCHED_FIFO task, its something
f5832c1998af2c kernel/sched/core.c Nicolas Pitre   2017-05-29  2720  		 * userspace knows about and won't get confused about.
f5832c1998af2c kernel/sched/core.c Nicolas Pitre   2017-05-29  2721  		 *
f5832c1998af2c kernel/sched/core.c Nicolas Pitre   2017-05-29  2722  		 * Also, it will make PI more or less work without too
f5832c1998af2c kernel/sched/core.c Nicolas Pitre   2017-05-29  2723  		 * much confusion -- but then, stop work should not
f5832c1998af2c kernel/sched/core.c Nicolas Pitre   2017-05-29  2724  		 * rely on PI working anyway.
f5832c1998af2c kernel/sched/core.c Nicolas Pitre   2017-05-29  2725  		 */
f5832c1998af2c kernel/sched/core.c Nicolas Pitre   2017-05-29  2726  		sched_setscheduler_nocheck(stop, SCHED_FIFO, &param);
f5832c1998af2c kernel/sched/core.c Nicolas Pitre   2017-05-29  2727  
f5832c1998af2c kernel/sched/core.c Nicolas Pitre   2017-05-29  2728  		stop->sched_class = &stop_sched_class;
ded467dc83ac71 kernel/sched/core.c Peter Zijlstra  2020-10-01  2729  
ded467dc83ac71 kernel/sched/core.c Peter Zijlstra  2020-10-01  2730  		/*
ded467dc83ac71 kernel/sched/core.c Peter Zijlstra  2020-10-01  2731  		 * The PI code calls rt_mutex_setprio() with ->pi_lock held to
ded467dc83ac71 kernel/sched/core.c Peter Zijlstra  2020-10-01  2732  		 * adjust the effective priority of a task. As a result,
ded467dc83ac71 kernel/sched/core.c Peter Zijlstra  2020-10-01  2733  		 * rt_mutex_setprio() can trigger (RT) balancing operations,
ded467dc83ac71 kernel/sched/core.c Peter Zijlstra  2020-10-01  2734  		 * which can then trigger wakeups of the stop thread to push
ded467dc83ac71 kernel/sched/core.c Peter Zijlstra  2020-10-01  2735  		 * around the current task.
ded467dc83ac71 kernel/sched/core.c Peter Zijlstra  2020-10-01  2736  		 *
ded467dc83ac71 kernel/sched/core.c Peter Zijlstra  2020-10-01  2737  		 * The stop task itself will never be part of the PI-chain, it
ded467dc83ac71 kernel/sched/core.c Peter Zijlstra  2020-10-01  2738  		 * never blocks, therefore that ->pi_lock recursion is safe.
ded467dc83ac71 kernel/sched/core.c Peter Zijlstra  2020-10-01  2739  		 * Tell lockdep about this by placing the stop->pi_lock in its
ded467dc83ac71 kernel/sched/core.c Peter Zijlstra  2020-10-01  2740  		 * own class.
ded467dc83ac71 kernel/sched/core.c Peter Zijlstra  2020-10-01  2741  		 */
ded467dc83ac71 kernel/sched/core.c Peter Zijlstra  2020-10-01  2742  		lockdep_set_class(&stop->pi_lock, &stop_pi_lock);
f5832c1998af2c kernel/sched/core.c Nicolas Pitre   2017-05-29  2743  	}
f5832c1998af2c kernel/sched/core.c Nicolas Pitre   2017-05-29  2744  
f5832c1998af2c kernel/sched/core.c Nicolas Pitre   2017-05-29  2745  	cpu_rq(cpu)->stop = stop;
f5832c1998af2c kernel/sched/core.c Nicolas Pitre   2017-05-29  2746  
f5832c1998af2c kernel/sched/core.c Nicolas Pitre   2017-05-29  2747  	if (old_stop) {
f5832c1998af2c kernel/sched/core.c Nicolas Pitre   2017-05-29  2748  		/*
f5832c1998af2c kernel/sched/core.c Nicolas Pitre   2017-05-29  2749  		 * Reset it back to a normal scheduling class so that
f5832c1998af2c kernel/sched/core.c Nicolas Pitre   2017-05-29  2750  		 * it can die in pieces.
f5832c1998af2c kernel/sched/core.c Nicolas Pitre   2017-05-29  2751  		 */
f5832c1998af2c kernel/sched/core.c Nicolas Pitre   2017-05-29  2752  		old_stop->sched_class = &rt_sched_class;
f5832c1998af2c kernel/sched/core.c Nicolas Pitre   2017-05-29  2753  	}
f5832c1998af2c kernel/sched/core.c Nicolas Pitre   2017-05-29  2754  }
f5832c1998af2c kernel/sched/core.c Nicolas Pitre   2017-05-29  2755  
25834c73f93af7 kernel/sched/core.c Peter Zijlstra  2015-05-15  2756  #else
25834c73f93af7 kernel/sched/core.c Peter Zijlstra  2015-05-15  2757  
25834c73f93af7 kernel/sched/core.c Peter Zijlstra  2015-05-15  2758  static inline int __set_cpus_allowed_ptr(struct task_struct *p,
9cfc3e18adb036 kernel/sched/core.c Peter Zijlstra  2020-09-16  2759  					 const struct cpumask *new_mask,
9cfc3e18adb036 kernel/sched/core.c Peter Zijlstra  2020-09-16  2760  					 u32 flags)
25834c73f93af7 kernel/sched/core.c Peter Zijlstra  2015-05-15  2761  {
25834c73f93af7 kernel/sched/core.c Peter Zijlstra  2015-05-15  2762  	return set_cpus_allowed_ptr(p, new_mask);
25834c73f93af7 kernel/sched/core.c Peter Zijlstra  2015-05-15  2763  }
25834c73f93af7 kernel/sched/core.c Peter Zijlstra  2015-05-15  2764  
5cc389bcee088b kernel/sched/core.c Peter Zijlstra  2015-06-11  2765  #endif /* CONFIG_SMP */
970b13bacba14a kernel/sched.c      Peter Zijlstra  2009-11-25  2766  
af449901b84c98 kernel/sched/core.c Peter Zijlstra  2020-09-17  2767  #if !defined(CONFIG_SMP) || !defined(CONFIG_PREEMPT_RT)
af449901b84c98 kernel/sched/core.c Peter Zijlstra  2020-09-17  2768  
af449901b84c98 kernel/sched/core.c Peter Zijlstra  2020-09-17  2769  static inline void migrate_disable_switch(struct rq *rq, struct task_struct *p) { }
af449901b84c98 kernel/sched/core.c Peter Zijlstra  2020-09-17  2770  
3015ef4b98f53f kernel/sched/core.c Thomas Gleixner 2020-08-26 @2771  static inline bool rq_has_pinned_tasks(struct rq *rq)
3015ef4b98f53f kernel/sched/core.c Thomas Gleixner 2020-08-26  2772  {
3015ef4b98f53f kernel/sched/core.c Thomas Gleixner 2020-08-26  2773  	return false;
3015ef4b98f53f kernel/sched/core.c Thomas Gleixner 2020-08-26  2774  }
3015ef4b98f53f kernel/sched/core.c Thomas Gleixner 2020-08-26  2775  

:::::: The code at line 2771 was first introduced by commit
:::::: 3015ef4b98f53fe7eba4f5f82f562c0e074d213c sched/core: Make migrate disable and CPU hotplug cooperative

:::::: TO: Thomas Gleixner <tglx@linutronix.de>
:::::: CC: Peter Zijlstra <peterz@infradead.org>

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org

[-- Attachment #2: .config.gz --]
[-- Type: application/gzip, Size: 27447 bytes --]

^ permalink raw reply	[flat|nested] 2+ messages in thread
* kernel/sched/core.c:2771:20: warning: unused function 'rq_has_pinned_tasks'
@ 2021-07-03 14:32 ` kernel test robot
  0 siblings, 0 replies; 2+ messages in thread
From: kernel test robot @ 2021-07-03 14:32 UTC (permalink / raw)
  To: kbuild-all

[-- Attachment #1: Type: text/plain, Size: 10115 bytes --]

Hi Peter,

FYI, the error/warning still remains.

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   4b820e167bf6f410ace479d8df5b15a574000e75
commit: a7c81556ec4d341dfdbf2cc478ead89d73e474a7 sched: Fix migrate_disable() vs rt/dl balancing
date:   8 months ago
config: mips-randconfig-r015-20210702 (attached as .config)
compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project 9eb613b2de3163686b1a4bd1160f15ac56a4b083)
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
        # install mips cross compiling tool for clang build
        # apt-get install binutils-mips-linux-gnu
        # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=a7c81556ec4d341dfdbf2cc478ead89d73e474a7
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout a7c81556ec4d341dfdbf2cc478ead89d73e474a7
        # save the attached .config to linux build tree
        mkdir build_dir
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross O=build_dir ARCH=mips SHELL=/bin/bash kernel/locking/ kernel/sched/ kernel/time/ mm/

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 >>):

   kernel/sched/core.c:2711:6: warning: no previous prototype for function 'sched_set_stop_task'
   void sched_set_stop_task(int cpu, struct task_struct
   ^
   kernel/sched/core.c:2711:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   void sched_set_stop_task(int cpu, struct task_struct
   ^
   static
   kernel/sched/core.c:4109:13: warning: variable 'rq' set but not used
   struct rq
   ^
>> kernel/sched/core.c:2771:20: warning: unused function 'rq_has_pinned_tasks'
   static inline bool rq_has_pinned_tasks(struct rq
   ^
   kernel/sched/core.c:4559:20: warning: unused function 'sched_tick_stop'
   static inline void sched_tick_stop(int cpu) { }
   ^
   kernel/sched/core.c:7224:20: warning: unused function 'balance_hotplug_wait'
   static inline void balance_hotplug_wait(void)
   ^
   fatal error: error in backend: Nested variants found in inline asm string: '.if ( 0x00 ) != -1)) 0x00 ) != -1)) : ($( static struct ftrace_branch_data __attribute__((__aligned__(4))) __attribute__((__section__("_ftrace_branch"))) __if_trace = $( .func = __func__, .file = "arch/mips/include/asm/barrier.h", .line = 21, $); 0x00 ) != -1)) : $))) ) && ( (1 << 0) ); .set push; .set mips64r2; .rept 1; sync 0x00; .endr; .set pop; .else; ; .endif'
   clang-13: error: clang frontend command failed with exit code 70 (use -v to see invocation)
   clang version 13.0.0 (git://gitmirror/llvm_project cb5de7c813f976dd458bd2a7f40702ba648bf650)
   Target: mips-unknown-linux-gnu
   Thread model: posix
   InstalledDir: /opt/cross/clang-cb5de7c813/bin
   clang-13: note: diagnostic msg:
   Makefile arch block certs crypto drivers fs include init ipc kernel lib mm scripts security sound source usr virt


vim +/rq_has_pinned_tasks +2771 kernel/sched/core.c

09a40af5240de0 kernel/sched.c      Mike Galbraith  2010-04-15  2710  
f5832c1998af2c kernel/sched/core.c Nicolas Pitre   2017-05-29 @2711  void sched_set_stop_task(int cpu, struct task_struct *stop)
f5832c1998af2c kernel/sched/core.c Nicolas Pitre   2017-05-29  2712  {
ded467dc83ac71 kernel/sched/core.c Peter Zijlstra  2020-10-01  2713  	static struct lock_class_key stop_pi_lock;
f5832c1998af2c kernel/sched/core.c Nicolas Pitre   2017-05-29  2714  	struct sched_param param = { .sched_priority = MAX_RT_PRIO - 1 };
f5832c1998af2c kernel/sched/core.c Nicolas Pitre   2017-05-29  2715  	struct task_struct *old_stop = cpu_rq(cpu)->stop;
f5832c1998af2c kernel/sched/core.c Nicolas Pitre   2017-05-29  2716  
f5832c1998af2c kernel/sched/core.c Nicolas Pitre   2017-05-29  2717  	if (stop) {
f5832c1998af2c kernel/sched/core.c Nicolas Pitre   2017-05-29  2718  		/*
f5832c1998af2c kernel/sched/core.c Nicolas Pitre   2017-05-29  2719  		 * Make it appear like a SCHED_FIFO task, its something
f5832c1998af2c kernel/sched/core.c Nicolas Pitre   2017-05-29  2720  		 * userspace knows about and won't get confused about.
f5832c1998af2c kernel/sched/core.c Nicolas Pitre   2017-05-29  2721  		 *
f5832c1998af2c kernel/sched/core.c Nicolas Pitre   2017-05-29  2722  		 * Also, it will make PI more or less work without too
f5832c1998af2c kernel/sched/core.c Nicolas Pitre   2017-05-29  2723  		 * much confusion -- but then, stop work should not
f5832c1998af2c kernel/sched/core.c Nicolas Pitre   2017-05-29  2724  		 * rely on PI working anyway.
f5832c1998af2c kernel/sched/core.c Nicolas Pitre   2017-05-29  2725  		 */
f5832c1998af2c kernel/sched/core.c Nicolas Pitre   2017-05-29  2726  		sched_setscheduler_nocheck(stop, SCHED_FIFO, &param);
f5832c1998af2c kernel/sched/core.c Nicolas Pitre   2017-05-29  2727  
f5832c1998af2c kernel/sched/core.c Nicolas Pitre   2017-05-29  2728  		stop->sched_class = &stop_sched_class;
ded467dc83ac71 kernel/sched/core.c Peter Zijlstra  2020-10-01  2729  
ded467dc83ac71 kernel/sched/core.c Peter Zijlstra  2020-10-01  2730  		/*
ded467dc83ac71 kernel/sched/core.c Peter Zijlstra  2020-10-01  2731  		 * The PI code calls rt_mutex_setprio() with ->pi_lock held to
ded467dc83ac71 kernel/sched/core.c Peter Zijlstra  2020-10-01  2732  		 * adjust the effective priority of a task. As a result,
ded467dc83ac71 kernel/sched/core.c Peter Zijlstra  2020-10-01  2733  		 * rt_mutex_setprio() can trigger (RT) balancing operations,
ded467dc83ac71 kernel/sched/core.c Peter Zijlstra  2020-10-01  2734  		 * which can then trigger wakeups of the stop thread to push
ded467dc83ac71 kernel/sched/core.c Peter Zijlstra  2020-10-01  2735  		 * around the current task.
ded467dc83ac71 kernel/sched/core.c Peter Zijlstra  2020-10-01  2736  		 *
ded467dc83ac71 kernel/sched/core.c Peter Zijlstra  2020-10-01  2737  		 * The stop task itself will never be part of the PI-chain, it
ded467dc83ac71 kernel/sched/core.c Peter Zijlstra  2020-10-01  2738  		 * never blocks, therefore that ->pi_lock recursion is safe.
ded467dc83ac71 kernel/sched/core.c Peter Zijlstra  2020-10-01  2739  		 * Tell lockdep about this by placing the stop->pi_lock in its
ded467dc83ac71 kernel/sched/core.c Peter Zijlstra  2020-10-01  2740  		 * own class.
ded467dc83ac71 kernel/sched/core.c Peter Zijlstra  2020-10-01  2741  		 */
ded467dc83ac71 kernel/sched/core.c Peter Zijlstra  2020-10-01  2742  		lockdep_set_class(&stop->pi_lock, &stop_pi_lock);
f5832c1998af2c kernel/sched/core.c Nicolas Pitre   2017-05-29  2743  	}
f5832c1998af2c kernel/sched/core.c Nicolas Pitre   2017-05-29  2744  
f5832c1998af2c kernel/sched/core.c Nicolas Pitre   2017-05-29  2745  	cpu_rq(cpu)->stop = stop;
f5832c1998af2c kernel/sched/core.c Nicolas Pitre   2017-05-29  2746  
f5832c1998af2c kernel/sched/core.c Nicolas Pitre   2017-05-29  2747  	if (old_stop) {
f5832c1998af2c kernel/sched/core.c Nicolas Pitre   2017-05-29  2748  		/*
f5832c1998af2c kernel/sched/core.c Nicolas Pitre   2017-05-29  2749  		 * Reset it back to a normal scheduling class so that
f5832c1998af2c kernel/sched/core.c Nicolas Pitre   2017-05-29  2750  		 * it can die in pieces.
f5832c1998af2c kernel/sched/core.c Nicolas Pitre   2017-05-29  2751  		 */
f5832c1998af2c kernel/sched/core.c Nicolas Pitre   2017-05-29  2752  		old_stop->sched_class = &rt_sched_class;
f5832c1998af2c kernel/sched/core.c Nicolas Pitre   2017-05-29  2753  	}
f5832c1998af2c kernel/sched/core.c Nicolas Pitre   2017-05-29  2754  }
f5832c1998af2c kernel/sched/core.c Nicolas Pitre   2017-05-29  2755  
25834c73f93af7 kernel/sched/core.c Peter Zijlstra  2015-05-15  2756  #else
25834c73f93af7 kernel/sched/core.c Peter Zijlstra  2015-05-15  2757  
25834c73f93af7 kernel/sched/core.c Peter Zijlstra  2015-05-15  2758  static inline int __set_cpus_allowed_ptr(struct task_struct *p,
9cfc3e18adb036 kernel/sched/core.c Peter Zijlstra  2020-09-16  2759  					 const struct cpumask *new_mask,
9cfc3e18adb036 kernel/sched/core.c Peter Zijlstra  2020-09-16  2760  					 u32 flags)
25834c73f93af7 kernel/sched/core.c Peter Zijlstra  2015-05-15  2761  {
25834c73f93af7 kernel/sched/core.c Peter Zijlstra  2015-05-15  2762  	return set_cpus_allowed_ptr(p, new_mask);
25834c73f93af7 kernel/sched/core.c Peter Zijlstra  2015-05-15  2763  }
25834c73f93af7 kernel/sched/core.c Peter Zijlstra  2015-05-15  2764  
5cc389bcee088b kernel/sched/core.c Peter Zijlstra  2015-06-11  2765  #endif /* CONFIG_SMP */
970b13bacba14a kernel/sched.c      Peter Zijlstra  2009-11-25  2766  
af449901b84c98 kernel/sched/core.c Peter Zijlstra  2020-09-17  2767  #if !defined(CONFIG_SMP) || !defined(CONFIG_PREEMPT_RT)
af449901b84c98 kernel/sched/core.c Peter Zijlstra  2020-09-17  2768  
af449901b84c98 kernel/sched/core.c Peter Zijlstra  2020-09-17  2769  static inline void migrate_disable_switch(struct rq *rq, struct task_struct *p) { }
af449901b84c98 kernel/sched/core.c Peter Zijlstra  2020-09-17  2770  
3015ef4b98f53f kernel/sched/core.c Thomas Gleixner 2020-08-26 @2771  static inline bool rq_has_pinned_tasks(struct rq *rq)
3015ef4b98f53f kernel/sched/core.c Thomas Gleixner 2020-08-26  2772  {
3015ef4b98f53f kernel/sched/core.c Thomas Gleixner 2020-08-26  2773  	return false;
3015ef4b98f53f kernel/sched/core.c Thomas Gleixner 2020-08-26  2774  }
3015ef4b98f53f kernel/sched/core.c Thomas Gleixner 2020-08-26  2775  

:::::: The code at line 2771 was first introduced by commit
:::::: 3015ef4b98f53fe7eba4f5f82f562c0e074d213c sched/core: Make migrate disable and CPU hotplug cooperative

:::::: TO: Thomas Gleixner <tglx@linutronix.de>
:::::: CC: Peter Zijlstra <peterz@infradead.org>

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org

[-- Attachment #2: config.gz --]
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2021-07-03 14:32 kernel/sched/core.c:2771:20: warning: unused function 'rq_has_pinned_tasks' kernel test robot
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