tree: https://github.com/zen-kernel/zen-kernel 5.7/muqss head: 83fdcd9083978f28fe1f43bcc3af3a1ee87691e9 commit: cd3b420bc9cd575a1eaf051463cfb1204599e8d9 [1/17] MultiQueue Skiplist Scheduler v0.202 config: powerpc-randconfig-r036-20200712 (attached as .config) compiler: clang version 11.0.0 (https://github.com/llvm/llvm-project 02946de3802d3bc65bc9f2eb9b8d4969b5a7add8) 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 powerpc cross compiling tool for clang build # apt-get install binutils-powerpc-linux-gnu git checkout cd3b420bc9cd575a1eaf051463cfb1204599e8d9 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=powerpc If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All error/warnings (new ones prefixed by >>): void resched_task(struct task_struct *p) ^ kernel/sched/MuQSS.c:637:1: note: declare 'static' if the function is not intended to be used outside of this translation unit void resched_task(struct task_struct *p) ^ static unsigned long nr_active(void) ^ kernel/sched/MuQSS.c:2932:1: note: declare 'static' if the function is not intended to be used outside of this translation unit unsigned long nr_active(void) ^ static void resched_cpu(int cpu) ^ kernel/sched/MuQSS.c:6000:1: note: declare 'static' if the function is not intended to be used outside of this translation unit void resched_cpu(int cpu) ^ static void init_idle_bootup_task(struct task_struct *idle) ^ kernel/sched/MuQSS.c:7464:1: note: declare 'static' if the function is not intended to be used outside of this translation unit void init_idle_bootup_task(struct task_struct *idle) ^ static struct task_group *sched_create_group(struct task_group *parent) ^ kernel/sched/MuQSS.c:7488:1: note: declare 'static' if the function is not intended to be used outside of this translation unit struct task_group *sched_create_group(struct task_group *parent) ^ static void sched_online_group(struct task_group *tg, struct task_group *parent) ^ kernel/sched/MuQSS.c:7499:1: note: declare 'static' if the function is not intended to be used outside of this translation unit void sched_online_group(struct task_group *tg, struct task_group *parent) ^ static void sched_destroy_group(struct task_group *tg) ^ kernel/sched/MuQSS.c:7510:1: note: declare 'static' if the function is not intended to be used outside of this translation unit void sched_destroy_group(struct task_group *tg) ^ static void sched_offline_group(struct task_group *tg) ^ kernel/sched/MuQSS.c:7516:1: note: declare 'static' if the function is not intended to be used outside of this translation unit void sched_offline_group(struct task_group *tg) ^ static .legacy_cftypes = cpu_legacy_files, ^~~~~~~~~~~~~~~~ kernel/sched/MuQSS.c:7606:20: note: previous initialization is here .legacy_cftypes = cpu_files, ^~~~~~~~~ kernel/sched/MuQSS.c:427:20: warning: unused function 'lock_all_rqs' [-Wunused-function] static inline void lock_all_rqs(void) ^ kernel/sched/MuQSS.c:439:20: warning: unused function 'unlock_all_rqs' [-Wunused-function] static inline void unlock_all_rqs(void) ^ kernel/sched/MuQSS.c:452:20: warning: unused function 'trylock_rq' [-Wunused-function] static inline bool trylock_rq(struct rq *this_rq, struct rq *rq) ^ kernel/sched/MuQSS.c:462:20: warning: unused function 'unlock_rq' [-Wunused-function] static inline void unlock_rq(struct rq *rq) ^ kernel/sched/MuQSS.c:1215:26: warning: unused function 'rq_order' [-Wunused-function] static inline struct rq *rq_order(struct rq *rq, int cpu) ^ kernel/sched/MuQSS.c:1220:20: warning: unused function 'smt_schedule' [-Wunused-function] static inline bool smt_schedule(struct task_struct *p, struct rq *rq) ^ kernel/sched/MuQSS.c:1908:19: warning: unused function 'select_best_cpu' [-Wunused-function] static inline int select_best_cpu(struct task_struct *p) ^ kernel/sched/MuQSS.c:3537:20: warning: unused function 'sched_start_tick' [-Wunused-function] static inline void sched_start_tick(struct rq *rq, int cpu) {} ^ kernel/sched/MuQSS.c:3538:20: warning: unused function 'sched_tick_start' [-Wunused-function] static inline void sched_tick_start(int cpu) { } ^ kernel/sched/MuQSS.c:3539:20: warning: unused function 'sched_tick_stop' [-Wunused-function] static inline void sched_tick_stop(int cpu) { } ^ 19 warnings generated. -- this_cpu_write(runqueues.membarrier_state, ^ >> kernel/sched/membarrier.c:39:2: error: indirection requires pointer operand ('void' invalid) this_cpu_write(runqueues.membarrier_state, ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/percpu-defs.h:508:34: note: expanded from macro 'this_cpu_write' #define this_cpu_write(pcp, val) __pcpu_size_call(this_cpu_write_, pcp, val) ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/percpu-defs.h:377:11: note: expanded from macro '__pcpu_size_call' case 1: stem##1(variable, __VA_ARGS__);break; \ ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ <scratch space>:103:1: note: expanded from here this_cpu_write_1 ^ include/asm-generic/percpu.h:333:36: note: expanded from macro 'this_cpu_write_1' #define this_cpu_write_1(pcp, val) this_cpu_generic_to_op(pcp, val, =) ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/asm-generic/percpu.h:148:2: note: expanded from macro 'this_cpu_generic_to_op' raw_cpu_generic_to_op(pcp, val, op); \ ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/asm-generic/percpu.h:72:2: note: expanded from macro 'raw_cpu_generic_to_op' *raw_cpu_ptr(&(pcp)) op val; \ ^~~~~~~~~~~~~~~~~~~~ this_cpu_write(runqueues.membarrier_state, ^ >> kernel/sched/membarrier.c:39:2: error: indirection requires pointer operand ('void' invalid) this_cpu_write(runqueues.membarrier_state, ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/percpu-defs.h:508:34: note: expanded from macro 'this_cpu_write' #define this_cpu_write(pcp, val) __pcpu_size_call(this_cpu_write_, pcp, val) ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/percpu-defs.h:378:11: note: expanded from macro '__pcpu_size_call' case 2: stem##2(variable, __VA_ARGS__);break; \ ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ <scratch space>:104:1: note: expanded from here this_cpu_write_2 ^ include/asm-generic/percpu.h:336:36: note: expanded from macro 'this_cpu_write_2' #define this_cpu_write_2(pcp, val) this_cpu_generic_to_op(pcp, val, =) ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/asm-generic/percpu.h:148:2: note: expanded from macro 'this_cpu_generic_to_op' raw_cpu_generic_to_op(pcp, val, op); \ ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/asm-generic/percpu.h:72:2: note: expanded from macro 'raw_cpu_generic_to_op' *raw_cpu_ptr(&(pcp)) op val; \ ^~~~~~~~~~~~~~~~~~~~ this_cpu_write(runqueues.membarrier_state, ^ >> kernel/sched/membarrier.c:39:2: error: indirection requires pointer operand ('void' invalid) this_cpu_write(runqueues.membarrier_state, ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/percpu-defs.h:508:34: note: expanded from macro 'this_cpu_write' #define this_cpu_write(pcp, val) __pcpu_size_call(this_cpu_write_, pcp, val) ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/percpu-defs.h:379:11: note: expanded from macro '__pcpu_size_call' case 4: stem##4(variable, __VA_ARGS__);break; \ ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ <scratch space>:105:1: note: expanded from here this_cpu_write_4 ^ include/asm-generic/percpu.h:339:36: note: expanded from macro 'this_cpu_write_4' #define this_cpu_write_4(pcp, val) this_cpu_generic_to_op(pcp, val, =) ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/asm-generic/percpu.h:148:2: note: expanded from macro 'this_cpu_generic_to_op' raw_cpu_generic_to_op(pcp, val, op); \ ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/asm-generic/percpu.h:72:2: note: expanded from macro 'raw_cpu_generic_to_op' *raw_cpu_ptr(&(pcp)) op val; \ ^~~~~~~~~~~~~~~~~~~~ this_cpu_write(runqueues.membarrier_state, ^ >> kernel/sched/membarrier.c:39:2: error: indirection requires pointer operand ('void' invalid) this_cpu_write(runqueues.membarrier_state, ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/percpu-defs.h:508:34: note: expanded from macro 'this_cpu_write' #define this_cpu_write(pcp, val) __pcpu_size_call(this_cpu_write_, pcp, val) ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/percpu-defs.h:380:11: note: expanded from macro '__pcpu_size_call' case 8: stem##8(variable, __VA_ARGS__);break; \ ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ <scratch space>:106:1: note: expanded from here this_cpu_write_8 ^ include/asm-generic/percpu.h:342:36: note: expanded from macro 'this_cpu_write_8' #define this_cpu_write_8(pcp, val) this_cpu_generic_to_op(pcp, val, =) ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/asm-generic/percpu.h:148:2: note: expanded from macro 'this_cpu_generic_to_op' raw_cpu_generic_to_op(pcp, val, op); \ ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/asm-generic/percpu.h:72:2: note: expanded from macro 'raw_cpu_generic_to_op' *raw_cpu_ptr(&(pcp)) op val; \ ^~~~~~~~~~~~~~~~~~~~ kernel/sched/membarrier.c:63:17: error: use of undeclared identifier 'runqueues' this_cpu_write(runqueues.membarrier_state, 0); ^ kernel/sched/membarrier.c:63:17: error: use of undeclared identifier 'runqueues' kernel/sched/membarrier.c:63:17: error: use of undeclared identifier 'runqueues' kernel/sched/membarrier.c:63:17: error: use of undeclared identifier 'runqueues' kernel/sched/membarrier.c:63:2: error: indirection requires pointer operand ('void' invalid) this_cpu_write(runqueues.membarrier_state, 0); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/percpu-defs.h:508:34: note: expanded from macro 'this_cpu_write' #define this_cpu_write(pcp, val) __pcpu_size_call(this_cpu_write_, pcp, val) ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/linux/percpu-defs.h:377:11: note: expanded from macro '__pcpu_size_call' case 1: stem##1(variable, __VA_ARGS__);break; \ ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ <scratch space>:107:1: note: expanded from here this_cpu_write_1 ^ include/asm-generic/percpu.h:333:36: note: expanded from macro 'this_cpu_write_1' #define this_cpu_write_1(pcp, val) this_cpu_generic_to_op(pcp, val, =) ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/asm-generic/percpu.h:148:2: note: expanded from macro 'this_cpu_generic_to_op' raw_cpu_generic_to_op(pcp, val, op); \ ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/asm-generic/percpu.h:72:2: note: expanded from macro 'raw_cpu_generic_to_op' *raw_cpu_ptr(&(pcp)) op val; \ ^~~~~~~~~~~~~~~~~~~~ fatal error: too many errors emitted, stopping now [-ferror-limit=] 20 errors generated. vim +/resched_task +637 kernel/sched/MuQSS.c 629 630 /* 631 * resched_task - mark a task 'to be rescheduled now'. 632 * 633 * On UP this means the setting of the need_resched flag, on SMP it 634 * might also involve a cross-CPU call to trigger the scheduler on 635 * the target CPU. 636 */ 638 { 639 int cpu; 640 #ifdef CONFIG_LOCKDEP 641 /* Kernel threads call this when creating workqueues while still 642 * inactive from __kthread_bind_mask, holding only the pi_lock */ 643 if (!(p->flags & PF_KTHREAD)) { 644 struct rq *rq = task_rq(p); 645 646 lockdep_assert_held(rq->lock); 647 } 648 #endif 649 if (test_tsk_need_resched(p)) 650 return; 651 652 cpu = task_cpu(p); 653 if (cpu == smp_processor_id()) { 654 set_tsk_need_resched(p); 655 set_preempt_need_resched(); 656 return; 657 } 658 659 if (set_nr_and_not_polling(p)) 660 smp_sched_reschedule(cpu); 661 else 662 trace_sched_wake_idle_without_ipi(cpu); 663 } 664 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org