tree: https://git.kernel.org/pub/scm/linux/kernel/git/mel/linux.git sched-noprop-v2r3 head: 604b499ea0ea9edfafe842745723a200b2afce89 commit: ccb63a6012ccc292c6bbe7cb688c64596252fbd9 [3/4] sched/fair: select idle cpu from idle cpumask for task wakeup config: i386-randconfig-s001-20210916 (attached as .config) compiler: gcc-9 (Debian 9.3.0-22) 9.3.0 reproduce: # apt-get install sparse # sparse version: v0.6.4-dirty # https://git.kernel.org/pub/scm/linux/kernel/git/mel/linux.git/commit/?id=... git remote add mel https://git.kernel.org/pub/scm/linux/kernel/git/mel/linux.git git fetch --no-tags mel sched-noprop-v2r3 git checkout ccb63a6012ccc292c6bbe7cb688c64596252fbd9 # save the attached .config to linux build tree make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=i386 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; sparse warnings: (new ones prefixed by >>) kernel/sched/fair.c:862:34: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected struct sched_entity *se @@ got struct sched_entity [noderef] __rcu * @@ kernel/sched/fair.c:862:34: sparse: expected struct sched_entity *se kernel/sched/fair.c:862:34: sparse: got struct sched_entity [noderef] __rcu * kernel/sched/fair.c:10867:9: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected struct sched_domain *[assigned] sd @@ got struct sched_domain [noderef] __rcu *parent @@ kernel/sched/fair.c:10867:9: sparse: expected struct sched_domain *[assigned] sd kernel/sched/fair.c:10867:9: sparse: got struct sched_domain [noderef] __rcu *parent kernel/sched/fair.c:5005:22: sparse: sparse: incompatible types in comparison expression (different address spaces): kernel/sched/fair.c:5005:22: sparse: struct task_struct [noderef] __rcu * kernel/sched/fair.c:5005:22: sparse: struct task_struct * kernel/sched/fair.c:5531:38: sparse: sparse: incorrect type in initializer (different address spaces) @@ expected struct task_struct *curr @@ got struct task_struct [noderef] __rcu *curr @@ kernel/sched/fair.c:5531:38: sparse: expected struct task_struct *curr kernel/sched/fair.c:5531:38: sparse: got struct task_struct [noderef] __rcu *curr kernel/sched/fair.c:5777:1: sparse: sparse: symbol '__pcpu_scope_load_balance_mask' was not declared. Should it be static? kernel/sched/fair.c:5778:1: sparse: sparse: symbol '__pcpu_scope_select_idle_mask' was not declared. Should it be static? kernel/sched/fair.c:6819:20: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected struct sched_domain *[assigned] sd @@ got struct sched_domain [noderef] __rcu *parent @@ kernel/sched/fair.c:6819:20: sparse: expected struct sched_domain *[assigned] sd kernel/sched/fair.c:6819:20: sparse: got struct sched_domain [noderef] __rcu *parent kernel/sched/fair.c:6953:9: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected struct sched_domain *[assigned] tmp @@ got struct sched_domain [noderef] __rcu *parent @@ kernel/sched/fair.c:6953:9: sparse: expected struct sched_domain *[assigned] tmp kernel/sched/fair.c:6953:9: sparse: got struct sched_domain [noderef] __rcu *parent kernel/sched/fair.c:7088:12: sparse: expected struct sched_domain *sd kernel/sched/fair.c:7088:12: sparse: got struct sched_domain [noderef] __rcu * kernel/sched/fair.c:7185:38: sparse: sparse: incorrect type in initializer (different address spaces) @@ expected struct task_struct *curr @@ got struct task_struct [noderef] __rcu *curr @@ kernel/sched/fair.c:7185:38: sparse: expected struct task_struct *curr kernel/sched/fair.c:7185:38: sparse: got struct task_struct [noderef] __rcu *curr kernel/sched/fair.c:7483:38: sparse: sparse: incorrect type in initializer (different address spaces) @@ expected struct task_struct *curr @@ got struct task_struct [noderef] __rcu *curr @@ kernel/sched/fair.c:7483:38: sparse: expected struct task_struct *curr kernel/sched/fair.c:7483:38: sparse: got struct task_struct [noderef] __rcu *curr kernel/sched/fair.c:8468:40: sparse: sparse: incorrect type in initializer (different address spaces) @@ expected struct sched_domain *child @@ got struct sched_domain [noderef] __rcu *child @@ kernel/sched/fair.c:8468:40: sparse: expected struct sched_domain *child kernel/sched/fair.c:8468:40: sparse: got struct sched_domain [noderef] __rcu *child kernel/sched/fair.c:8916:22: sparse: sparse: incompatible types in comparison expression (different address spaces): kernel/sched/fair.c:8916:22: sparse: struct task_struct [noderef] __rcu * kernel/sched/fair.c:8916:22: sparse: struct task_struct * kernel/sched/fair.c:10179:9: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected struct sched_domain *[assigned] sd @@ got struct sched_domain [noderef] __rcu *parent @@ kernel/sched/fair.c:10179:9: sparse: expected struct sched_domain *[assigned] sd kernel/sched/fair.c:10179:9: sparse: got struct sched_domain [noderef] __rcu *parent kernel/sched/fair.c:9839:44: sparse: sparse: incorrect type in initializer (different address spaces) @@ expected struct sched_domain *sd_parent @@ got struct sched_domain [noderef] __rcu *parent @@ kernel/sched/fair.c:9839:44: sparse: expected struct sched_domain *sd_parent kernel/sched/fair.c:9839:44: sparse: got struct sched_domain [noderef] __rcu *parent kernel/sched/fair.c:10251:9: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected struct sched_domain *[assigned] sd @@ got struct sched_domain [noderef] __rcu *parent @@ kernel/sched/fair.c:10251:9: sparse: expected struct sched_domain *[assigned] sd kernel/sched/fair.c:10251:9: sparse: got struct sched_domain [noderef] __rcu *parent kernel/sched/fair.c: note: in included file: kernel/sched/sched.h:2027:25: sparse: sparse: incompatible types in comparison expression (different address spaces): kernel/sched/sched.h:2027:25: sparse: struct task_struct [noderef] __rcu * kernel/sched/sched.h:2027:25: sparse: struct task_struct * kernel/sched/sched.h:2185:9: sparse: sparse: incompatible types in comparison expression (different address spaces): kernel/sched/sched.h:2185:9: sparse: struct task_struct [noderef] __rcu * kernel/sched/sched.h:2185:9: sparse: struct task_struct * kernel/sched/sched.h:2027:25: sparse: sparse: incompatible types in comparison expression (different address spaces): kernel/sched/sched.h:2027:25: sparse: struct task_struct [noderef] __rcu * kernel/sched/sched.h:2027:25: sparse: struct task_struct * kernel/sched/sched.h:2027:25: sparse: sparse: incompatible types in comparison expression (different address spaces): kernel/sched/sched.h:2027:25: sparse: struct task_struct [noderef] __rcu * kernel/sched/sched.h:2027:25: sparse: struct task_struct * vim +7088 kernel/sched/fair.c 7062 7063 /* 7064 * Update cpu idle state and record this information 7065 * in sd_llc_shared->idle_cpus_span. 7066 * 7067 * This function is called with interrupts disabled. 7068 */ 7069 void update_idle_cpumask(int cpu, bool idle) 7070 { 7071 struct sched_domain *sd; 7072 struct rq *rq = cpu_rq(cpu); 7073 int idle_state; 7074 7075 /* 7076 * Also set SCHED_IDLE cpu in idle cpumask to 7077 * allow SCHED_IDLE cpu as a wakeup target. 7078 */ 7079 idle_state = idle || sched_idle_cpu(cpu); 7080 /* 7081 * No need to update idle cpumask if the state 7082 * does not change. 7083 */ 7084 if (rq->last_idle_state == idle_state) 7085 return; 7086 7087 rcu_read_lock(); 7089 if (unlikely(!sd)) 7090 goto unlock; 7091 7092 if (idle_state) 7093 cpumask_set_cpu(cpu, sds_idle_cpus(sd->shared)); 7094 else 7095 cpumask_clear_cpu(cpu, sds_idle_cpus(sd->shared)); 7096 7097 rq->last_idle_state = idle_state; 7098 unlock: 7099 rcu_read_unlock(); 7100 } 7101 #endif /* CONFIG_SMP */ 7102 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org