Hi Alfred, FYI, the error/warning still remains. tree: https://github.com/zen-kernel/zen-kernel 5.15/prjc head: 09b9774798f91c4747ee3266e910eb8aebf2118c commit: b0e39e1ae101c8d2492c21132d91e1103ca585dd [93/237] sched/alt: Sync up missing new interfaces. config: x86_64-allyesconfig (attached as .config) compiler: gcc-9 (Debian 9.3.0-22) 9.3.0 reproduce (this is a W=1 build): # https://github.com/zen-kernel/zen-kernel/commit/b0e39e1ae101c8d2492c21132... git remote add zen https://github.com/zen-kernel/zen-kernel git fetch --no-tags zen 5.15/prjc git checkout b0e39e1ae101c8d2492c21132d91e1103ca585dd # save the attached .config to linux build tree make W=1 ARCH=x86_64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): | __state kernel/sched/alt_core.c: In function '__schedule': kernel/sched/alt_core.c:3726:21: error: 'struct task_struct' has no member named 'state'; did you mean '__state'? 3726 | prev_state = prev->state; | ^~~~~ | __state kernel/sched/alt_core.c:3727:52: error: 'struct task_struct' has no member named 'state'; did you mean '__state'? 3727 | if (!preempt && prev_state && prev_state == prev->state) { | ^~~~~ | __state kernel/sched/alt_core.c:3729:10: error: 'struct task_struct' has no member named 'state'; did you mean '__state'? 3729 | prev->state = TASK_RUNNING; | ^~~~~ | __state kernel/sched/alt_core.c: In function 'sched_submit_work': kernel/sched/alt_core.c:3828:12: error: 'struct task_struct' has no member named 'state'; did you mean '__state'? 3828 | if (!tsk->state) | ^~~~~ | __state In file included from arch/x86/include/asm/bug.h:84, from include/linux/bug.h:5, from arch/x86/include/asm/paravirt.h:15, from arch/x86/include/asm/irqflags.h:63, from include/linux/irqflags.h:16, from include/linux/rcupdate.h:26, from include/linux/rculist.h:11, from include/linux/pid.h:5, from include/linux/sched.h:14, from include/linux/kthread.h:6, from include/trace/events/sched.h:8, from kernel/sched/alt_core.c:15: kernel/sched/alt_core.c: In function 'schedule_idle': kernel/sched/alt_core.c:3903:24: error: 'struct task_struct' has no member named 'state'; did you mean '__state'? 3903 | WARN_ON_ONCE(current->state); | ^~~~~ include/asm-generic/bug.h:104:25: note: in definition of macro 'WARN_ON_ONCE' 104 | int __ret_warn_on = !!(condition); \ | ^~~~~~~~~ kernel/sched/alt_core.c: In function '__sched_setscheduler': kernel/sched/alt_core.c:4425:39: error: 'MAX_USER_RT_PRIO' undeclared (first use in this function); did you mean 'MAX_RT_PRIO'? 4425 | (p->mm && attr->sched_priority > MAX_USER_RT_PRIO - 1) || | ^~~~~~~~~~~~~~~~ | MAX_RT_PRIO kernel/sched/alt_core.c: At top level: kernel/sched/alt_core.c:5183:13: error: redefinition of '_cond_resched' 5183 | int __sched _cond_resched(void) | ^~~~~~~~~~~~~ In file included from include/linux/kthread.h:6, from include/trace/events/sched.h:8, from kernel/sched/alt_core.c:15: include/linux/sched.h:2065:19: note: previous definition of '_cond_resched' was here 2065 | static inline int _cond_resched(void) | ^~~~~~~~~~~~~ kernel/sched/alt_core.c: In function '__do_sys_sched_get_priority_max': kernel/sched/alt_core.c:5336:9: error: 'MAX_USER_RT_PRIO' undeclared (first use in this function); did you mean 'MAX_RT_PRIO'? 5336 | ret = MAX_USER_RT_PRIO-1; | ^~~~~~~~~~~~~~~~ | MAX_RT_PRIO kernel/sched/alt_core.c: In function 'sched_show_task': kernel/sched/alt_core.c:5446:9: error: 'struct task_struct' has no member named 'state'; did you mean '__state'? 5446 | if (p->state == TASK_RUNNING) | ^~~~~ | __state kernel/sched/alt_core.c: In function 'state_filter_match': kernel/sched/alt_core.c:5475:11: error: 'struct task_struct' has no member named 'state'; did you mean '__state'? 5475 | if (!(p->state & state_filter)) | ^~~~~ | __state kernel/sched/alt_core.c:5482:49: error: 'struct task_struct' has no member named 'state'; did you mean '__state'? 5482 | if (state_filter == TASK_UNINTERRUPTIBLE && p->state == TASK_IDLE) | ^~~~~ | __state kernel/sched/alt_core.c: At top level: kernel/sched/alt_core.c:5489:6: error: conflicting types for 'show_state_filter' 5489 | void show_state_filter(unsigned long state_filter) | ^~~~~~~~~~~~~~~~~ In file included from kernel/sched/alt_sched.h:9, from kernel/sched/sched.h:6, from kernel/sched/alt_core.c:18: include/linux/sched/debug.h:17:13: note: previous declaration of 'show_state_filter' was here 17 | extern void show_state_filter(unsigned int state_filter); | ^~~~~~~~~~~~~~~~~ kernel/sched/alt_core.c: In function 'init_idle': kernel/sched/alt_core.c:5548:8: error: 'struct task_struct' has no member named 'state'; did you mean '__state'? 5548 | idle->state = TASK_RUNNING; | ^~~~~ | __state kernel/sched/alt_core.c: At top level: kernel/sched/alt_core.c:5622:6: error: no previous prototype for 'idle_task_exit' [-Werror=missing-prototypes] 5622 | void idle_task_exit(void) | ^~~~~~~~~~~~~~ kernel/sched/alt_core.c:5771:5: error: no previous prototype for 'sched_cpu_activate' [-Werror=missing-prototypes] 5771 | int sched_cpu_activate(unsigned int cpu) | ^~~~~~~~~~~~~~~~~~ kernel/sched/alt_core.c:5804:5: error: no previous prototype for 'sched_cpu_deactivate' [-Werror=missing-prototypes] 5804 | int sched_cpu_deactivate(unsigned int cpu) | ^~~~~~~~~~~~~~~~~~~~ kernel/sched/alt_core.c:5847:5: error: no previous prototype for 'sched_cpu_starting' [-Werror=missing-prototypes] 5847 | int sched_cpu_starting(unsigned int cpu) | ^~~~~~~~~~~~~~~~~~ 5867 | int sched_cpu_wait_empty(unsigned int cpu) | ^~~~~~~~~~~~~~~~~~~~ kernel/sched/alt_core.c:5872:5: error: no previous prototype for 'sched_cpu_dying' [-Werror=missing-prototypes] 5872 | int sched_cpu_dying(unsigned int cpu) | ^~~~~~~~~~~~~~~ In file included from include/linux/printk.h:11, from include/linux/kernel.h:19, from arch/x86/include/asm/percpu.h:27, from arch/x86/include/asm/current.h:6, from include/linux/sched.h:12, from include/linux/kthread.h:6, from include/trace/events/sched.h:8, from kernel/sched/alt_core.c:15: kernel/sched/alt_core.c: In function '__might_sleep': kernel/sched/alt_core.c:6101:21: error: 'struct task_struct' has no member named 'state'; did you mean '__state'? 6101 | WARN_ONCE(current->state != TASK_RUNNING && current->task_state_change, | ^~~~~ include/linux/once_lite.h:15:27: note: in definition of macro 'DO_ONCE_LITE_IF' 15 | bool __ret_do_once = !!(condition); \ | ^~~~~~~~~ kernel/sched/alt_core.c:6101:2: note: in expansion of macro 'WARN_ONCE' 6101 | WARN_ONCE(current->state != TASK_RUNNING && current->task_state_change, | ^~~~~~~~~ In file included from arch/x86/include/asm/bug.h:84, from include/linux/bug.h:5, from arch/x86/include/asm/paravirt.h:15, from arch/x86/include/asm/irqflags.h:63, from include/linux/irqflags.h:16, from include/linux/rcupdate.h:26, from include/linux/rculist.h:11, from include/linux/pid.h:5, from include/linux/sched.h:14, from include/linux/kthread.h:6, from include/trace/events/sched.h:8, from kernel/sched/alt_core.c:15: kernel/sched/alt_core.c:6104:13: error: 'struct task_struct' has no member named 'state'; did you mean '__state'? 6104 | current->state, | ^~~~~ include/asm-generic/bug.h:99:17: note: in definition of macro '__WARN_printf' 99 | __warn_printk(arg); \ | ^~~ include/linux/once_lite.h:19:4: note: in expansion of macro 'WARN' 19 | func(__VA_ARGS__); \ | ^~~~ include/asm-generic/bug.h:150:2: note: in expansion of macro 'DO_ONCE_LITE_IF' 150 | DO_ONCE_LITE_IF(condition, WARN, 1, format) | ^~~~~~~~~~~~~~~ kernel/sched/alt_core.c:6101:2: note: in expansion of macro 'WARN_ONCE' 6101 | WARN_ONCE(current->state != TASK_RUNNING && current->task_state_change, | ^~~~~~~~~ kernel/sched/alt_core.c: In function '___might_sleep': kernel/sched/alt_core.c:6117:16: error: variable 'preempt_disable_ip' set but not used [-Werror=unused-but-set-variable] 6117 | unsigned long preempt_disable_ip; | ^~~~~~~~~~~~~~~~~~ kernel/sched/alt_core.c: At top level: kernel/sched/alt_core.c:6283:20: error: no previous prototype for 'sched_create_group' [-Werror=missing-prototypes] 6283 | struct task_group *sched_create_group(struct task_group *parent) | ^~~~~~~~~~~~~~~~~~ kernel/sched/alt_core.c:6294:6: error: no previous prototype for 'sched_online_group' [-Werror=missing-prototypes] 6294 | void sched_online_group(struct task_group *tg, struct task_group *parent) | ^~~~~~~~~~~~~~~~~~ kernel/sched/alt_core.c:6305:6: error: no previous prototype for 'sched_destroy_group' [-Werror=missing-prototypes] 6305 | void sched_destroy_group(struct task_group *tg) | ^~~~~~~~~~~~~~~~~~~ kernel/sched/alt_core.c:6311:6: error: no previous prototype for 'sched_offline_group' [-Werror=missing-prototypes] 6311 | void sched_offline_group(struct task_group *tg) | ^~~~~~~~~~~~~~~~~~~ kernel/sched/alt_core.c:6403:20: error: initialized field overwritten [-Werror=override-init] 6403 | .legacy_cftypes = cpu_legacy_files, | ^~~~~~~~~~~~~~~~ kernel/sched/alt_core.c:6403:20: note: (near initialization for 'cpu_cgrp_subsys.legacy_cftypes') In file included from kernel/sched/alt_core.c:134: kernel/sched/pds_imp.h: In function 'normal_prio': kernel/sched/pds_imp.h:42:1: error: control reaches end of non-void function [-Werror=return-type] 42 | } | ^ cc1: all warnings being treated as errors vim +/sched_cpu_wait_empty +5867 kernel/sched/alt_core.c 5855 5856 /* 5857 * Invoked immediately before the stopper thread is invoked to bring the 5858 * CPU down completely. At this point all per CPU kthreads except the 5859 * hotplug thread (current) and the stopper thread (inactive) have been 5860 * either parked or have been unbound from the outgoing CPU. Ensure that 5861 * any of those which might be on the way out are gone. 5862 * 5863 * If after this point a bound task is being woken on this CPU then the 5864 * responsible hotplug callback has failed to do it's job. 5865 * sched_cpu_dying() will catch it with the appropriate fireworks. 5866 */ 5868 { 5869 return 0; 5870 } 5871 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org