tree: https://chromium.googlesource.com/chromiumos/third_party/kernel chromeos-4.19 head: 45baa007ba13bc516470dbd9379b2f7525a087e1 commit: 33b634a147c282f733336dfe39d8b7c4bf11509a [56/59] CHROMIUM: sched: Add a per-thread core scheduling interface config: x86_64-randconfig-s022-20200615 (attached as .config) compiler: gcc-9 (Debian 9.3.0-13) 9.3.0 reproduce: # apt-get install sparse # sparse version: v0.6.2-rc1-3-g55607964-dirty git checkout 33b634a147c282f733336dfe39d8b7c4bf11509a # save the attached .config to linux build tree make W=1 C=1 ARCH=x86_64 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' 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 >>, old ones prefixed by <<): kernel/sched/core.c:313:6: sparse: sparse: symbol 'sched_core_get' was not declared. Should it be static? kernel/sched/core.c:321:6: sparse: sparse: symbol 'sched_core_put' was not declared. Should it be static? kernel/sched/core.c:911:9: sparse: sparse: incompatible types in comparison expression (different address spaces): kernel/sched/core.c:911:9: sparse: struct sched_domain [noderef] <asn:4> * kernel/sched/core.c:911:9: sparse: struct sched_domain * kernel/sched/core.c:1980:6: sparse: sparse: symbol 'sched_set_stop_task' was not declared. Should it be static? kernel/sched/core.c:2039:17: sparse: sparse: incompatible types in comparison expression (different address spaces): kernel/sched/core.c:2039:17: sparse: struct sched_domain [noderef] <asn:4> * kernel/sched/core.c:2039:17: sparse: struct sched_domain * kernel/sched/core.c:2227:27: sparse: sparse: incompatible types in comparison expression (different address spaces): kernel/sched/core.c:2227:27: sparse: struct task_struct [noderef] <asn:4> * kernel/sched/core.c:2227:27: sparse: struct task_struct * kernel/sched/core.c:4193:9: sparse: sparse: incompatible types in comparison expression (different address spaces): kernel/sched/core.c:4193:9: sparse: struct sched_domain [noderef] <asn:4> * kernel/sched/core.c:4193:9: sparse: struct sched_domain * kernel/sched/core.c:7117:60: sparse: sparse: no member 'sched_task_group' in struct task_struct kernel/sched/core.c:5875:28: sparse: sparse: context imbalance in '__cond_resched_lock' - unexpected unlock kernel/sched/core.c:313:6: warning: no previous prototype for 'sched_core_get' [-Wmissing-prototypes] 313 | void sched_core_get(void) | ^~~~~~~~~~~~~~ kernel/sched/core.c:321:6: warning: no previous prototype for 'sched_core_put' [-Wmissing-prototypes] 321 | void sched_core_put(void) | ^~~~~~~~~~~~~~ kernel/sched/core.c:1980:6: warning: no previous prototype for 'sched_set_stop_task' [-Wmissing-prototypes] 1980 | void sched_set_stop_task(int cpu, struct task_struct *stop) | ^~~~~~~~~~~~~~~~~~~ kernel/sched/core.c:4577:35: warning: no previous prototype for 'preempt_schedule_irq' [-Wmissing-prototypes] 4577 | asmlinkage __visible void __sched preempt_schedule_irq(void) | ^~~~~~~~~~~~~~~~~~~~ kernel/sched/core.c: In function 'sched_init': kernel/sched/core.c:6835:32: warning: variable 'ptr' set but not used [-Wunused-but-set-variable] 6835 | unsigned long alloc_size = 0, ptr; | ^~~ kernel/sched/core.c: In function 'task_set_core_sched': 7117 | (tsk->core_cookie == (unsigned long)tsk->sched_task_group)) { | ^~ -- kernel/sched/core.c:313:6: warning: no previous prototype for 'sched_core_get' [-Wmissing-prototypes] 313 | void sched_core_get(void) | ^~~~~~~~~~~~~~ kernel/sched/core.c:321:6: warning: no previous prototype for 'sched_core_put' [-Wmissing-prototypes] 321 | void sched_core_put(void) | ^~~~~~~~~~~~~~ kernel/sched/core.c:1980:6: warning: no previous prototype for 'sched_set_stop_task' [-Wmissing-prototypes] 1980 | void sched_set_stop_task(int cpu, struct task_struct *stop) | ^~~~~~~~~~~~~~~~~~~ kernel/sched/core.c:4577:35: warning: no previous prototype for 'preempt_schedule_irq' [-Wmissing-prototypes] 4577 | asmlinkage __visible void __sched preempt_schedule_irq(void) | ^~~~~~~~~~~~~~~~~~~~ kernel/sched/core.c: In function 'sched_init': kernel/sched/core.c:6835:32: warning: variable 'ptr' set but not used [-Wunused-but-set-variable] 6835 | unsigned long alloc_size = 0, ptr; | ^~~ kernel/sched/core.c: In function 'task_set_core_sched': 7117 | (tsk->core_cookie == (unsigned long)tsk->sched_task_group)) { | ^~ vim +7117 kernel/sched/core.c 7090 7091 int task_set_core_sched(int set, struct task_struct *tsk) 7092 { 7093 if (!tsk) 7094 tsk = current; 7095 7096 // if (!capable(CAP_SYS_ADMIN)) 7097 // return -EPERM; 7098 7099 if (set > 1) 7100 return -ERANGE; 7101 7102 if (!static_branch_likely(&sched_smt_present)) 7103 return -EINVAL; 7104 7105 /* 7106 * If cookie was set previously, return -EBUSY if either of the 7107 * following are true: 7108 * 1. Task was previously tagged by CGroup method. 7109 * 2. Task or its parent were tagged by prctl(). 7110 * 7111 * Note that, if CGroup tagging is done after prctl(), then that would 7112 * override the cookie. However, if prctl() is done after task was 7113 * added to tagged CGroup, then the prctl() returns -EBUSY. 7114 */ 7115 if (!!tsk->core_cookie == set) { 7116 if ((tsk->core_cookie == (unsigned long)tsk) || 7118 return -EBUSY; 7119 } 7120 } 7121 7122 if (set) 7123 sched_core_get(); 7124 7125 tsk->core_cookie = set ? (unsigned long)tsk : 0; 7126 7127 stop_machine(task_set_core_sched_stopper, NULL, NULL); 7128 7129 if (!set) 7130 sched_core_put(); 7131 7132 pr_alert("coresched: prctl success: %s/%d %lx (fork: %d)\n", tsk->comm, 7133 tsk->pid, tsk->core_cookie, tsk != current); 7134 return 0; 7135 } 7136 #endif 7137 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org