tree: https://github.com/zen-kernel/zen-kernel 5.15/prjc head: 88afbbeeefd1e9ceca6efea72562fca5fc546daf commit: d9b7f3286c71166d00ccfcb64f13c1147210e865 [197/239] sched/alt: [Sync] b03fbd4ff24c sched: Introduce task_is_running() config: i386-randconfig-a003-20211118 (attached as .config) 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/zen-kernel/zen-kernel/commit/d9b7f3286c71166d00ccfcb64... git remote add zen https://github.com/zen-kernel/zen-kernel git fetch --no-tags zen 5.15/prjc git checkout d9b7f3286c71166d00ccfcb64f13c1147210e865 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 ARCH=i386 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>): kernel/sched/alt_core.c:830:6: warning: no previous prototype for function 'resched_curr' [-Wmissing-prototypes] void resched_curr(struct rq *rq) ^ kernel/sched/alt_core.c:830:1: note: declare 'static' if the function is not intended to be used outside of this translation unit void resched_curr(struct rq *rq) ^ static kernel/sched/alt_core.c:853:6: warning: no previous prototype for function 'resched_cpu' [-Wmissing-prototypes] void resched_cpu(int cpu) ^ kernel/sched/alt_core.c:853:1: note: declare 'static' if the function is not intended to be used outside of this translation unit void resched_cpu(int cpu) ^ static kernel/sched/alt_core.c:1940:5: error: no member named 'state' in 'struct task_struct' p->state = TASK_RUNNING; ~ ^ kernel/sched/alt_core.c:2305:12: error: no member named 'state' in 'struct task_struct' if (!(p->state & state)) ~ ^ kernel/sched/alt_core.c:2310:6: error: no member named 'state' in 'struct task_struct' p->state = TASK_RUNNING; ~ ^ kernel/sched/alt_core.c:2323:11: error: no member named 'state' in 'struct task_struct' if (!(p->state & state)) ~ ^ kernel/sched/alt_core.c:2485:14: error: no member named 'state' in 'struct task_struct' switch (p->state) { ~ ^ kernel/sched/alt_core.c:2561:5: error: no member named 'state' in 'struct task_struct' p->state = TASK_NEW; ~ ^ kernel/sched/alt_core.c:2713:5: error: no member named 'state' in 'struct task_struct' p->state = TASK_RUNNING; ~ ^ kernel/sched/alt_core.c:3066:21: error: no member named 'state' in 'struct task_struct' prev_state = prev->state; ~~~~ ^ kernel/sched/alt_core.c:3844:24: error: no member named 'state' in 'struct task_struct' if (!preempt && prev->state && prev->non_block_count) { ~~~~ ^ kernel/sched/alt_core.c:4111:21: error: no member named 'state' in 'struct task_struct' prev_state = prev->state; ~~~~ ^ kernel/sched/alt_core.c:4112:52: error: no member named 'state' in 'struct task_struct' if (!preempt && prev_state && prev_state == prev->state) { ~~~~ ^ kernel/sched/alt_core.c:4114:10: error: no member named 'state' in 'struct task_struct' prev->state = TASK_RUNNING; ~~~~ ^ kernel/sched/alt_core.c:4292:24: error: no member named 'state' in 'struct task_struct' WARN_ON_ONCE(current->state); ~~~~~~~ ^ include/asm-generic/bug.h:104:25: note: expanded from macro 'WARN_ON_ONCE' int __ret_warn_on = !!(condition); \ ^~~~~~~~~ kernel/sched/alt_core.c:6064:11: error: no member named 'state' in 'struct task_struct' if (!(p->state & state_filter)) ~ ^ kernel/sched/alt_core.c:6071:49: error: no member named 'state' in 'struct task_struct' if (state_filter == TASK_UNINTERRUPTIBLE && p->state == TASK_IDLE) ~ ^ kernel/sched/alt_core.c:6078:6: error: conflicting types for 'show_state_filter' void show_state_filter(unsigned long state_filter) ^ include/linux/sched/debug.h:17:13: note: previous declaration is here extern void show_state_filter(unsigned int state_filter); ^ kernel/sched/alt_core.c:6145:8: error: no member named 'state' in 'struct task_struct' idle->state = TASK_RUNNING; ~~~~ ^ kernel/sched/alt_core.c:6831:21: error: no member named 'state' in 'struct task_struct' WARN_ONCE(current->state != TASK_RUNNING && current->task_state_change, ~~~~~~~ ^ include/asm-generic/bug.h:150:18: note: expanded from macro 'WARN_ONCE' DO_ONCE_LITE_IF(condition, WARN, 1, format) ^~~~~~~~~ include/linux/once_lite.h:15:27: note: expanded from macro 'DO_ONCE_LITE_IF' bool __ret_do_once = !!(condition); \ ^~~~~~~~~ kernel/sched/alt_core.c:6834:13: error: no member named 'state' in 'struct task_struct' current->state, ~~~~~~~ ^ include/asm-generic/bug.h:150:38: note: expanded from macro 'WARN_ONCE' DO_ONCE_LITE_IF(condition, WARN, 1, format) ^~~~~~ include/linux/once_lite.h:19:9: note: expanded from macro 'DO_ONCE_LITE_IF' func(__VA_ARGS__); \ ^~~~~~~~~~~ include/asm-generic/bug.h:132:29: note: expanded from macro 'WARN' __WARN_printf(TAINT_WARN, format); \ ^~~~~~ include/asm-generic/bug.h:99:17: note: expanded from macro '__WARN_printf' __warn_printk(arg); \ ^~~ kernel/sched/alt_core.c:6847:16: warning: variable 'preempt_disable_ip' set but not used [-Wunused-but-set-variable] unsigned long preempt_disable_ip; ^ struct task_group *sched_create_group(struct task_group *parent) ^ kernel/sched/alt_core.c:7042:1: 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/alt_core.c:7053:1: 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/alt_core.c:7064:1: 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/alt_core.c:7070:1: 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 kernel/sched/alt_core.c:7209:20: warning: initializer overrides prior initialization of this subobject [-Winitializer-overrides] .legacy_cftypes = cpu_legacy_files, ^~~~~~~~~~~~~~~~ kernel/sched/alt_core.c:7208:20: note: previous initialization is here .legacy_cftypes = cpu_files, ^~~~~~~~~ 8 warnings and 19 errors generated. vim +/sched_create_group +7042 kernel/sched/alt_core.c cb06db4ef97b1e9 Alfred Chen 2019-08-19 6841 cb06db4ef97b1e9 Alfred Chen 2019-08-19 6842 void ___might_sleep(const char *file, int line, int preempt_offset) cb06db4ef97b1e9 Alfred Chen 2019-08-19 6843 { cb06db4ef97b1e9 Alfred Chen 2019-08-19 6844 /* Ratelimiting timestamp: */ cb06db4ef97b1e9 Alfred Chen 2019-08-19 6845 static unsigned long prev_jiffy; cb06db4ef97b1e9 Alfred Chen 2019-08-19 6846 cb06db4ef97b1e9 Alfred Chen 2019-08-19 @6847 unsigned long preempt_disable_ip; cb06db4ef97b1e9 Alfred Chen 2019-08-19 6848 cb06db4ef97b1e9 Alfred Chen 2019-08-19 6849 /* WARN_ON_ONCE() by default, no rate limit required: */ cb06db4ef97b1e9 Alfred Chen 2019-08-19 6850 rcu_sleep_check(); cb06db4ef97b1e9 Alfred Chen 2019-08-19 6851 cb06db4ef97b1e9 Alfred Chen 2019-08-19 6852 if ((preempt_count_equals(preempt_offset) && !irqs_disabled() && cb06db4ef97b1e9 Alfred Chen 2019-08-19 6853 !is_idle_task(current) && !current->non_block_count) || cb06db4ef97b1e9 Alfred Chen 2019-08-19 6854 system_state == SYSTEM_BOOTING || system_state > SYSTEM_RUNNING || cb06db4ef97b1e9 Alfred Chen 2019-08-19 6855 oops_in_progress) cb06db4ef97b1e9 Alfred Chen 2019-08-19 6856 return; cb06db4ef97b1e9 Alfred Chen 2019-08-19 6857 if (time_before(jiffies, prev_jiffy + HZ) && prev_jiffy) cb06db4ef97b1e9 Alfred Chen 2019-08-19 6858 return; cb06db4ef97b1e9 Alfred Chen 2019-08-19 6859 prev_jiffy = jiffies; cb06db4ef97b1e9 Alfred Chen 2019-08-19 6860 cb06db4ef97b1e9 Alfred Chen 2019-08-19 6861 /* Save this before calling printk(), since that will clobber it: */ cb06db4ef97b1e9 Alfred Chen 2019-08-19 6862 preempt_disable_ip = get_preempt_disable_ip(current); cb06db4ef97b1e9 Alfred Chen 2019-08-19 6863 cb06db4ef97b1e9 Alfred Chen 2019-08-19 6864 printk(KERN_ERR cb06db4ef97b1e9 Alfred Chen 2019-08-19 6865 "BUG: sleeping function called from invalid context at %s:%d\n", cb06db4ef97b1e9 Alfred Chen 2019-08-19 6866 file, line); cb06db4ef97b1e9 Alfred Chen 2019-08-19 6867 printk(KERN_ERR cb06db4ef97b1e9 Alfred Chen 2019-08-19 6868 "in_atomic(): %d, irqs_disabled(): %d, non_block: %d, pid: %d, name: %s\n", cb06db4ef97b1e9 Alfred Chen 2019-08-19 6869 in_atomic(), irqs_disabled(), current->non_block_count, cb06db4ef97b1e9 Alfred Chen 2019-08-19 6870 current->pid, current->comm); cb06db4ef97b1e9 Alfred Chen 2019-08-19 6871 cb06db4ef97b1e9 Alfred Chen 2019-08-19 6872 if (task_stack_end_corrupted(current)) cb06db4ef97b1e9 Alfred Chen 2019-08-19 6873 printk(KERN_EMERG "Thread overran stack, or stack corrupted\n"); cb06db4ef97b1e9 Alfred Chen 2019-08-19 6874 cb06db4ef97b1e9 Alfred Chen 2019-08-19 6875 debug_show_held_locks(current); cb06db4ef97b1e9 Alfred Chen 2019-08-19 6876 if (irqs_disabled()) cb06db4ef97b1e9 Alfred Chen 2019-08-19 6877 print_irqtrace_events(current); cb06db4ef97b1e9 Alfred Chen 2019-08-19 6878 #ifdef CONFIG_DEBUG_PREEMPT cb06db4ef97b1e9 Alfred Chen 2019-08-19 6879 if (!preempt_count_equals(preempt_offset)) { cb06db4ef97b1e9 Alfred Chen 2019-08-19 6880 pr_err("Preemption disabled at:"); d57edc338350f5f Alfred Chen 2020-08-02 6881 print_ip_sym(KERN_ERR, preempt_disable_ip); cb06db4ef97b1e9 Alfred Chen 2019-08-19 6882 } cb06db4ef97b1e9 Alfred Chen 2019-08-19 6883 #endif cb06db4ef97b1e9 Alfred Chen 2019-08-19 6884 dump_stack(); cb06db4ef97b1e9 Alfred Chen 2019-08-19 6885 add_taint(TAINT_WARN, LOCKDEP_STILL_OK); cb06db4ef97b1e9 Alfred Chen 2019-08-19 6886 } cb06db4ef97b1e9 Alfred Chen 2019-08-19 6887 EXPORT_SYMBOL(___might_sleep); cb06db4ef97b1e9 Alfred Chen 2019-08-19 6888 cb06db4ef97b1e9 Alfred Chen 2019-08-19 6889 void __cant_sleep(const char *file, int line, int preempt_offset) cb06db4ef97b1e9 Alfred Chen 2019-08-19 6890 { cb06db4ef97b1e9 Alfred Chen 2019-08-19 6891 static unsigned long prev_jiffy; cb06db4ef97b1e9 Alfred Chen 2019-08-19 6892 cb06db4ef97b1e9 Alfred Chen 2019-08-19 6893 if (irqs_disabled()) cb06db4ef97b1e9 Alfred Chen 2019-08-19 6894 return; cb06db4ef97b1e9 Alfred Chen 2019-08-19 6895 cb06db4ef97b1e9 Alfred Chen 2019-08-19 6896 if (!IS_ENABLED(CONFIG_PREEMPT_COUNT)) cb06db4ef97b1e9 Alfred Chen 2019-08-19 6897 return; cb06db4ef97b1e9 Alfred Chen 2019-08-19 6898 cb06db4ef97b1e9 Alfred Chen 2019-08-19 6899 if (preempt_count() > preempt_offset) cb06db4ef97b1e9 Alfred Chen 2019-08-19 6900 return; cb06db4ef97b1e9 Alfred Chen 2019-08-19 6901 cb06db4ef97b1e9 Alfred Chen 2019-08-19 6902 if (time_before(jiffies, prev_jiffy + HZ) && prev_jiffy) cb06db4ef97b1e9 Alfred Chen 2019-08-19 6903 return; cb06db4ef97b1e9 Alfred Chen 2019-08-19 6904 prev_jiffy = jiffies; cb06db4ef97b1e9 Alfred Chen 2019-08-19 6905 cb06db4ef97b1e9 Alfred Chen 2019-08-19 6906 printk(KERN_ERR "BUG: assuming atomic context at %s:%d\n", file, line); cb06db4ef97b1e9 Alfred Chen 2019-08-19 6907 printk(KERN_ERR "in_atomic(): %d, irqs_disabled(): %d, pid: %d, name: %s\n", cb06db4ef97b1e9 Alfred Chen 2019-08-19 6908 in_atomic(), irqs_disabled(), cb06db4ef97b1e9 Alfred Chen 2019-08-19 6909 current->pid, current->comm); cb06db4ef97b1e9 Alfred Chen 2019-08-19 6910 cb06db4ef97b1e9 Alfred Chen 2019-08-19 6911 debug_show_held_locks(current); cb06db4ef97b1e9 Alfred Chen 2019-08-19 6912 dump_stack(); cb06db4ef97b1e9 Alfred Chen 2019-08-19 6913 add_taint(TAINT_WARN, LOCKDEP_STILL_OK); cb06db4ef97b1e9 Alfred Chen 2019-08-19 6914 } cb06db4ef97b1e9 Alfred Chen 2019-08-19 6915 EXPORT_SYMBOL_GPL(__cant_sleep); b0e39e1ae101c8d Alfred Chen 2021-02-03 6916 b0e39e1ae101c8d Alfred Chen 2021-02-03 6917 #ifdef CONFIG_SMP b0e39e1ae101c8d Alfred Chen 2021-02-03 6918 void __cant_migrate(const char *file, int line) b0e39e1ae101c8d Alfred Chen 2021-02-03 6919 { 613ad5e4353f72d Alfred Chen 2021-02-28 6920 static unsigned long prev_jiffy; 613ad5e4353f72d Alfred Chen 2021-02-28 6921 613ad5e4353f72d Alfred Chen 2021-02-28 6922 if (irqs_disabled()) 613ad5e4353f72d Alfred Chen 2021-02-28 6923 return; 613ad5e4353f72d Alfred Chen 2021-02-28 6924 613ad5e4353f72d Alfred Chen 2021-02-28 6925 if (is_migration_disabled(current)) 613ad5e4353f72d Alfred Chen 2021-02-28 6926 return; 613ad5e4353f72d Alfred Chen 2021-02-28 6927 613ad5e4353f72d Alfred Chen 2021-02-28 6928 if (!IS_ENABLED(CONFIG_PREEMPT_COUNT)) 613ad5e4353f72d Alfred Chen 2021-02-28 6929 return; 613ad5e4353f72d Alfred Chen 2021-02-28 6930 613ad5e4353f72d Alfred Chen 2021-02-28 6931 if (preempt_count() > 0) 613ad5e4353f72d Alfred Chen 2021-02-28 6932 return; 613ad5e4353f72d Alfred Chen 2021-02-28 6933 613ad5e4353f72d Alfred Chen 2021-02-28 6934 if (current->migration_flags & MDF_FORCE_ENABLED) 613ad5e4353f72d Alfred Chen 2021-02-28 6935 return; 613ad5e4353f72d Alfred Chen 2021-02-28 6936 613ad5e4353f72d Alfred Chen 2021-02-28 6937 if (time_before(jiffies, prev_jiffy + HZ) && prev_jiffy) 613ad5e4353f72d Alfred Chen 2021-02-28 6938 return; 613ad5e4353f72d Alfred Chen 2021-02-28 6939 prev_jiffy = jiffies; 613ad5e4353f72d Alfred Chen 2021-02-28 6940 613ad5e4353f72d Alfred Chen 2021-02-28 6941 pr_err("BUG: assuming non migratable context at %s:%d\n", file, line); 613ad5e4353f72d Alfred Chen 2021-02-28 6942 pr_err("in_atomic(): %d, irqs_disabled(): %d, migration_disabled() %u pid: %d, name: %s\n", 613ad5e4353f72d Alfred Chen 2021-02-28 6943 in_atomic(), irqs_disabled(), is_migration_disabled(current), 613ad5e4353f72d Alfred Chen 2021-02-28 6944 current->pid, current->comm); 613ad5e4353f72d Alfred Chen 2021-02-28 6945 613ad5e4353f72d Alfred Chen 2021-02-28 6946 debug_show_held_locks(current); 613ad5e4353f72d Alfred Chen 2021-02-28 6947 dump_stack(); 613ad5e4353f72d Alfred Chen 2021-02-28 6948 add_taint(TAINT_WARN, LOCKDEP_STILL_OK); b0e39e1ae101c8d Alfred Chen 2021-02-03 6949 } b0e39e1ae101c8d Alfred Chen 2021-02-03 6950 EXPORT_SYMBOL_GPL(__cant_migrate); b0e39e1ae101c8d Alfred Chen 2021-02-03 6951 #endif cb06db4ef97b1e9 Alfred Chen 2019-08-19 6952 #endif cb06db4ef97b1e9 Alfred Chen 2019-08-19 6953 cb06db4ef97b1e9 Alfred Chen 2019-08-19 6954 #ifdef CONFIG_MAGIC_SYSRQ cb06db4ef97b1e9 Alfred Chen 2019-08-19 6955 void normalize_rt_tasks(void) cb06db4ef97b1e9 Alfred Chen 2019-08-19 6956 { cb06db4ef97b1e9 Alfred Chen 2019-08-19 6957 struct task_struct *g, *p; cb06db4ef97b1e9 Alfred Chen 2019-08-19 6958 struct sched_attr attr = { cb06db4ef97b1e9 Alfred Chen 2019-08-19 6959 .sched_policy = SCHED_NORMAL, cb06db4ef97b1e9 Alfred Chen 2019-08-19 6960 }; cb06db4ef97b1e9 Alfred Chen 2019-08-19 6961 cb06db4ef97b1e9 Alfred Chen 2019-08-19 6962 read_lock(&tasklist_lock); cb06db4ef97b1e9 Alfred Chen 2019-08-19 6963 for_each_process_thread(g, p) { cb06db4ef97b1e9 Alfred Chen 2019-08-19 6964 /* cb06db4ef97b1e9 Alfred Chen 2019-08-19 6965 * Only normalize user tasks: cb06db4ef97b1e9 Alfred Chen 2019-08-19 6966 */ cb06db4ef97b1e9 Alfred Chen 2019-08-19 6967 if (p->flags & PF_KTHREAD) cb06db4ef97b1e9 Alfred Chen 2019-08-19 6968 continue; cb06db4ef97b1e9 Alfred Chen 2019-08-19 6969 cb06db4ef97b1e9 Alfred Chen 2019-08-19 6970 if (!rt_task(p)) { cb06db4ef97b1e9 Alfred Chen 2019-08-19 6971 /* cb06db4ef97b1e9 Alfred Chen 2019-08-19 6972 * Renice negative nice level userspace cb06db4ef97b1e9 Alfred Chen 2019-08-19 6973 * tasks back to 0: cb06db4ef97b1e9 Alfred Chen 2019-08-19 6974 */ cb06db4ef97b1e9 Alfred Chen 2019-08-19 6975 if (task_nice(p) < 0) cb06db4ef97b1e9 Alfred Chen 2019-08-19 6976 set_user_nice(p, 0); cb06db4ef97b1e9 Alfred Chen 2019-08-19 6977 continue; cb06db4ef97b1e9 Alfred Chen 2019-08-19 6978 } cb06db4ef97b1e9 Alfred Chen 2019-08-19 6979 cb06db4ef97b1e9 Alfred Chen 2019-08-19 6980 __sched_setscheduler(p, &attr, false, false); cb06db4ef97b1e9 Alfred Chen 2019-08-19 6981 } cb06db4ef97b1e9 Alfred Chen 2019-08-19 6982 read_unlock(&tasklist_lock); cb06db4ef97b1e9 Alfred Chen 2019-08-19 6983 } cb06db4ef97b1e9 Alfred Chen 2019-08-19 6984 #endif /* CONFIG_MAGIC_SYSRQ */ cb06db4ef97b1e9 Alfred Chen 2019-08-19 6985 cb06db4ef97b1e9 Alfred Chen 2019-08-19 6986 #if defined(CONFIG_IA64) || defined(CONFIG_KGDB_KDB) cb06db4ef97b1e9 Alfred Chen 2019-08-19 6987 /* cb06db4ef97b1e9 Alfred Chen 2019-08-19 6988 * These functions are only useful for the IA64 MCA handling, or kdb. cb06db4ef97b1e9 Alfred Chen 2019-08-19 6989 * cb06db4ef97b1e9 Alfred Chen 2019-08-19 6990 * They can only be called when the whole system has been cb06db4ef97b1e9 Alfred Chen 2019-08-19 6991 * stopped - every CPU needs to be quiescent, and no scheduling cb06db4ef97b1e9 Alfred Chen 2019-08-19 6992 * activity can take place. Using them for anything else would cb06db4ef97b1e9 Alfred Chen 2019-08-19 6993 * be a serious bug, and as a result, they aren't even visible cb06db4ef97b1e9 Alfred Chen 2019-08-19 6994 * under any other configuration. cb06db4ef97b1e9 Alfred Chen 2019-08-19 6995 */ cb06db4ef97b1e9 Alfred Chen 2019-08-19 6996 cb06db4ef97b1e9 Alfred Chen 2019-08-19 6997 /** cb06db4ef97b1e9 Alfred Chen 2019-08-19 6998 * curr_task - return the current task for a given CPU. cb06db4ef97b1e9 Alfred Chen 2019-08-19 6999 * @cpu: the processor in question. cb06db4ef97b1e9 Alfred Chen 2019-08-19 7000 * cb06db4ef97b1e9 Alfred Chen 2019-08-19 7001 * ONLY VALID WHEN THE WHOLE SYSTEM IS STOPPED! cb06db4ef97b1e9 Alfred Chen 2019-08-19 7002 * cb06db4ef97b1e9 Alfred Chen 2019-08-19 7003 * Return: The current task for @cpu. cb06db4ef97b1e9 Alfred Chen 2019-08-19 7004 */ cb06db4ef97b1e9 Alfred Chen 2019-08-19 7005 struct task_struct *curr_task(int cpu) cb06db4ef97b1e9 Alfred Chen 2019-08-19 7006 { cb06db4ef97b1e9 Alfred Chen 2019-08-19 7007 return cpu_curr(cpu); cb06db4ef97b1e9 Alfred Chen 2019-08-19 7008 } cb06db4ef97b1e9 Alfred Chen 2019-08-19 7009 cb06db4ef97b1e9 Alfred Chen 2019-08-19 7010 #endif /* defined(CONFIG_IA64) || defined(CONFIG_KGDB_KDB) */ cb06db4ef97b1e9 Alfred Chen 2019-08-19 7011 cb06db4ef97b1e9 Alfred Chen 2019-08-19 7012 #ifdef CONFIG_IA64 cb06db4ef97b1e9 Alfred Chen 2019-08-19 7013 /** cb06db4ef97b1e9 Alfred Chen 2019-08-19 7014 * ia64_set_curr_task - set the current task for a given CPU. cb06db4ef97b1e9 Alfred Chen 2019-08-19 7015 * @cpu: the processor in question. cb06db4ef97b1e9 Alfred Chen 2019-08-19 7016 * @p: the task pointer to set. cb06db4ef97b1e9 Alfred Chen 2019-08-19 7017 * cb06db4ef97b1e9 Alfred Chen 2019-08-19 7018 * Description: This function must only be used when non-maskable interrupts cb06db4ef97b1e9 Alfred Chen 2019-08-19 7019 * are serviced on a separate stack. It allows the architecture to switch the cb06db4ef97b1e9 Alfred Chen 2019-08-19 7020 * notion of the current task on a CPU in a non-blocking manner. This function cb06db4ef97b1e9 Alfred Chen 2019-08-19 7021 * must be called with all CPU's synchronised, and interrupts disabled, the cb06db4ef97b1e9 Alfred Chen 2019-08-19 7022 * and caller must save the original value of the current task (see cb06db4ef97b1e9 Alfred Chen 2019-08-19 7023 * curr_task() above) and restore that value before reenabling interrupts and cb06db4ef97b1e9 Alfred Chen 2019-08-19 7024 * re-starting the system. cb06db4ef97b1e9 Alfred Chen 2019-08-19 7025 * cb06db4ef97b1e9 Alfred Chen 2019-08-19 7026 * ONLY VALID WHEN THE WHOLE SYSTEM IS STOPPED! cb06db4ef97b1e9 Alfred Chen 2019-08-19 7027 */ cb06db4ef97b1e9 Alfred Chen 2019-08-19 7028 void ia64_set_curr_task(int cpu, struct task_struct *p) cb06db4ef97b1e9 Alfred Chen 2019-08-19 7029 { cb06db4ef97b1e9 Alfred Chen 2019-08-19 7030 cpu_curr(cpu) = p; cb06db4ef97b1e9 Alfred Chen 2019-08-19 7031 } cb06db4ef97b1e9 Alfred Chen 2019-08-19 7032 cb06db4ef97b1e9 Alfred Chen 2019-08-19 7033 #endif cb06db4ef97b1e9 Alfred Chen 2019-08-19 7034 cb06db4ef97b1e9 Alfred Chen 2019-08-19 7035 #ifdef CONFIG_CGROUP_SCHED cb06db4ef97b1e9 Alfred Chen 2019-08-19 7036 static void sched_free_group(struct task_group *tg) cb06db4ef97b1e9 Alfred Chen 2019-08-19 7037 { cb06db4ef97b1e9 Alfred Chen 2019-08-19 7038 kmem_cache_free(task_group_cache, tg); cb06db4ef97b1e9 Alfred Chen 2019-08-19 7039 } cb06db4ef97b1e9 Alfred Chen 2019-08-19 7040 cb06db4ef97b1e9 Alfred Chen 2019-08-19 7041 /* allocate runqueue etc for a new task group */ cb06db4ef97b1e9 Alfred Chen 2019-08-19 @7042 struct task_group *sched_create_group(struct task_group *parent) cb06db4ef97b1e9 Alfred Chen 2019-08-19 7043 { cb06db4ef97b1e9 Alfred Chen 2019-08-19 7044 struct task_group *tg; cb06db4ef97b1e9 Alfred Chen 2019-08-19 7045 cb06db4ef97b1e9 Alfred Chen 2019-08-19 7046 tg = kmem_cache_alloc(task_group_cache, GFP_KERNEL | __GFP_ZERO); cb06db4ef97b1e9 Alfred Chen 2019-08-19 7047 if (!tg) cb06db4ef97b1e9 Alfred Chen 2019-08-19 7048 return ERR_PTR(-ENOMEM); cb06db4ef97b1e9 Alfred Chen 2019-08-19 7049 cb06db4ef97b1e9 Alfred Chen 2019-08-19 7050 return tg; cb06db4ef97b1e9 Alfred Chen 2019-08-19 7051 } cb06db4ef97b1e9 Alfred Chen 2019-08-19 7052 cb06db4ef97b1e9 Alfred Chen 2019-08-19 @7053 void sched_online_group(struct task_group *tg, struct task_group *parent) cb06db4ef97b1e9 Alfred Chen 2019-08-19 7054 { cb06db4ef97b1e9 Alfred Chen 2019-08-19 7055 } cb06db4ef97b1e9 Alfred Chen 2019-08-19 7056 cb06db4ef97b1e9 Alfred Chen 2019-08-19 7057 /* rcu callback to free various structures associated with a task group */ cb06db4ef97b1e9 Alfred Chen 2019-08-19 7058 static void sched_free_group_rcu(struct rcu_head *rhp) cb06db4ef97b1e9 Alfred Chen 2019-08-19 7059 { cb06db4ef97b1e9 Alfred Chen 2019-08-19 7060 /* Now it should be safe to free those cfs_rqs */ cb06db4ef97b1e9 Alfred Chen 2019-08-19 7061 sched_free_group(container_of(rhp, struct task_group, rcu)); cb06db4ef97b1e9 Alfred Chen 2019-08-19 7062 } cb06db4ef97b1e9 Alfred Chen 2019-08-19 7063 cb06db4ef97b1e9 Alfred Chen 2019-08-19 @7064 void sched_destroy_group(struct task_group *tg) cb06db4ef97b1e9 Alfred Chen 2019-08-19 7065 { cb06db4ef97b1e9 Alfred Chen 2019-08-19 7066 /* Wait for possible concurrent references to cfs_rqs complete */ cb06db4ef97b1e9 Alfred Chen 2019-08-19 7067 call_rcu(&tg->rcu, sched_free_group_rcu); cb06db4ef97b1e9 Alfred Chen 2019-08-19 7068 } cb06db4ef97b1e9 Alfred Chen 2019-08-19 7069 cb06db4ef97b1e9 Alfred Chen 2019-08-19 @7070 void sched_offline_group(struct task_group *tg) cb06db4ef97b1e9 Alfred Chen 2019-08-19 7071 { cb06db4ef97b1e9 Alfred Chen 2019-08-19 7072 } cb06db4ef97b1e9 Alfred Chen 2019-08-19 7073 :::::: The code at line 7042 was first introduced by commit :::::: cb06db4ef97b1e99a0350d328e6044f374941410 Project C v5.7.5-r2 :::::: TO: Alfred Chen <cchalpha(a)gmail.com&gt; :::::: CC: Alfred Chen <cchalpha(a)gmail.com&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org