tree: https://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git sched/urgent head: 84897bc5a39d8e52d695e5e6178f2130a7b3cd2a commit: 84897bc5a39d8e52d695e5e6178f2130a7b3cd2a [10/10] sched: Fix hotplug vs ttwu race config: x86_64-randconfig-s022-20210120 (attached as .config) compiler: gcc-9 (Debian 9.3.0-15) 9.3.0 reproduce: # apt-get install sparse # sparse version: v0.6.3-208-g46a52ca4-dirty # https://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git/commit/?... git remote add peterz-queue https://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git git fetch --no-tags peterz-queue sched/urgent git checkout 84897bc5a39d8e52d695e5e6178f2130a7b3cd2a # save the attached .config to linux build tree make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=x86_64 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/core.c:347:48: sparse: sparse: incorrect type in argument 2 (different address spaces) @@ expected struct task_struct *p @@ got struct task_struct [noderef] __rcu *curr @@ kernel/sched/core.c:347:48: sparse: expected struct task_struct *p kernel/sched/core.c:347:48: sparse: got struct task_struct [noderef] __rcu *curr kernel/sched/core.c:603:38: sparse: sparse: incorrect type in initializer (different address spaces) @@ expected struct task_struct *curr @@ got struct task_struct [noderef] __rcu *curr @@ kernel/sched/core.c:603:38: sparse: expected struct task_struct *curr kernel/sched/core.c:603:38: sparse: got struct task_struct [noderef] __rcu *curr kernel/sched/core.c:658:9: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected struct sched_domain *[assigned] sd @@ got struct sched_domain [noderef] __rcu *parent @@ kernel/sched/core.c:658:9: sparse: expected struct sched_domain *[assigned] sd kernel/sched/core.c:658:9: sparse: got struct sched_domain [noderef] __rcu *parent kernel/sched/core.c:1717:33: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected struct task_struct *p @@ got struct task_struct [noderef] __rcu *curr @@ kernel/sched/core.c:1717:33: sparse: expected struct task_struct *p kernel/sched/core.c:1717:33: sparse: got struct task_struct [noderef] __rcu *curr kernel/sched/core.c:1717:68: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected struct task_struct *tsk @@ got struct task_struct [noderef] __rcu *curr @@ kernel/sched/core.c:1717:68: sparse: expected struct task_struct *tsk kernel/sched/core.c:1717:68: sparse: got struct task_struct [noderef] __rcu *curr kernel/sched/core.c:2917:17: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected struct sched_domain *[assigned] sd @@ got struct sched_domain [noderef] __rcu *parent @@ kernel/sched/core.c:2917:17: sparse: expected struct sched_domain *[assigned] sd kernel/sched/core.c:2917:17: sparse: got struct sched_domain [noderef] __rcu *parent kernel/sched/core.c:3114:36: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected struct task_struct const *p @@ got struct task_struct [noderef] __rcu *curr @@ kernel/sched/core.c:3114:36: sparse: expected struct task_struct const *p kernel/sched/core.c:3114:36: sparse: got struct task_struct [noderef] __rcu *curr kernel/sched/core.c:7285:43: sparse: sparse: incorrect type in initializer (different address spaces) @@ expected struct task_struct *push_task @@ got struct task_struct [noderef] __rcu *curr @@ kernel/sched/core.c:7285:43: sparse: expected struct task_struct *push_task kernel/sched/core.c:7285:43: sparse: got struct task_struct [noderef] __rcu *curr kernel/sched/core.c:4540:38: sparse: sparse: incorrect type in initializer (different address spaces) @@ expected struct task_struct *curr @@ got struct task_struct [noderef] __rcu *curr @@ kernel/sched/core.c:4540:38: sparse: expected struct task_struct *curr kernel/sched/core.c:4540:38: sparse: got struct task_struct [noderef] __rcu *curr kernel/sched/core.c:4625:14: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected struct task_struct *curr @@ got struct task_struct [noderef] __rcu *curr @@ kernel/sched/core.c:4625:14: sparse: expected struct task_struct *curr kernel/sched/core.c:4625:14: sparse: got struct task_struct [noderef] __rcu *curr kernel/sched/core.c:4974:14: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected struct task_struct *prev @@ got struct task_struct [noderef] __rcu *curr @@ kernel/sched/core.c:4974:14: sparse: expected struct task_struct *prev kernel/sched/core.c:4974:14: sparse: got struct task_struct [noderef] __rcu *curr kernel/sched/core.c:5438:17: sparse: sparse: incompatible types in comparison expression (different address spaces): kernel/sched/core.c:5438:17: sparse: struct task_struct * kernel/sched/core.c:5438:17: sparse: struct task_struct [noderef] __rcu * kernel/sched/core.c:5641:22: sparse: sparse: incompatible types in comparison expression (different address spaces): kernel/sched/core.c:5641:22: sparse: struct task_struct [noderef] __rcu * kernel/sched/core.c:5641:22: sparse: struct task_struct * kernel/sched/core.c:8599:11: sparse: sparse: symbol 'max_cfs_quota_period' was not declared. Should it be static? kernel/sched/core.c:9150:25: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected struct task_struct *p @@ got struct task_struct [noderef] __rcu *curr @@ kernel/sched/core.c:9150:25: sparse: expected struct task_struct *p kernel/sched/core.c:9150:25: sparse: got struct task_struct [noderef] __rcu *curr kernel/sched/core.c: note: in included file: kernel/sched/pelt.h:85:13: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected struct task_struct const *p @@ got struct task_struct [noderef] __rcu *curr @@ kernel/sched/pelt.h:85:13: sparse: expected struct task_struct const *p kernel/sched/pelt.h:85:13: sparse: got struct task_struct [noderef] __rcu *curr kernel/sched/core.c:347:11: sparse: sparse: dereference of noderef expression kernel/sched/core.c:1708:33: sparse: sparse: dereference of noderef expression kernel/sched/core.c:1709:19: sparse: sparse: dereference of noderef expression kernel/sched/core.c:1710:37: sparse: sparse: dereference of noderef expression kernel/sched/core.c:2051:9: sparse: sparse: context imbalance in 'push_cpu_stop' - different lock contexts for basic block kernel/sched/core.c: note: in included file: kernel/sched/sched.h:1722:25: sparse: sparse: incompatible types in comparison expression (different address spaces): kernel/sched/sched.h:1722:25: sparse: struct task_struct [noderef] __rcu * kernel/sched/sched.h:1722:25: sparse: struct task_struct * kernel/sched/sched.h:1877:9: sparse: sparse: incompatible types in comparison expression (different address spaces): kernel/sched/sched.h:1877:9: sparse: struct task_struct [noderef] __rcu * kernel/sched/sched.h:1877:9: sparse: struct task_struct * kernel/sched/sched.h:1883:9: sparse: sparse: incompatible types in comparison expression (different address spaces): kernel/sched/sched.h:1883:9: sparse: struct task_struct [noderef] __rcu * kernel/sched/sched.h:1883:9: sparse: struct task_struct * kernel/sched/core.c:1683:38: sparse: sparse: incompatible types in comparison expression (different address spaces): kernel/sched/core.c:1683:38: sparse: struct task_struct [noderef] __rcu * kernel/sched/core.c:1683:38: sparse: struct task_struct const * kernel/sched/sched.h:1722:25: sparse: sparse: incompatible types in comparison expression (different address spaces): kernel/sched/sched.h:1722:25: sparse: struct task_struct [noderef] __rcu * kernel/sched/sched.h:1722:25: sparse: struct task_struct * kernel/sched/sched.h:1877:9: sparse: sparse: incompatible types in comparison expression (different address spaces): kernel/sched/sched.h:1877:9: sparse: struct task_struct [noderef] __rcu * kernel/sched/sched.h:1877:9: sparse: struct task_struct * kernel/sched/sched.h:1877:9: sparse: sparse: incompatible types in comparison expression (different address spaces): kernel/sched/sched.h:1877:9: sparse: struct task_struct [noderef] __rcu * kernel/sched/sched.h:1877:9: sparse: struct task_struct * kernel/sched/sched.h:1722:25: sparse: sparse: incompatible types in comparison expression (different address spaces): kernel/sched/sched.h:1722:25: sparse: struct task_struct [noderef] __rcu * kernel/sched/sched.h:1722:25: sparse: struct task_struct * kernel/sched/sched.h:1877:9: sparse: sparse: incompatible types in comparison expression (different address spaces): kernel/sched/sched.h:1877:9: sparse: struct task_struct [noderef] __rcu * kernel/sched/sched.h:1877:9: sparse: struct task_struct * kernel/sched/sched.h:1883:9: sparse: sparse: incompatible types in comparison expression (different address spaces): kernel/sched/sched.h:1883:9: sparse: struct task_struct [noderef] __rcu * kernel/sched/sched.h:1883:9: sparse: struct task_struct * kernel/sched/sched.h:1722:25: sparse: sparse: incompatible types in comparison expression (different address spaces): kernel/sched/sched.h:1722:25: sparse: struct task_struct [noderef] __rcu * kernel/sched/sched.h:1722:25: sparse: struct task_struct * kernel/sched/sched.h:1877:9: sparse: sparse: incompatible types in comparison expression (different address spaces): kernel/sched/sched.h:1877:9: sparse: struct task_struct [noderef] __rcu * kernel/sched/sched.h:1877:9: sparse: struct task_struct * kernel/sched/sched.h:1883:9: sparse: sparse: incompatible types in comparison expression (different address spaces): kernel/sched/sched.h:1883:9: sparse: struct task_struct [noderef] __rcu * kernel/sched/sched.h:1883:9: sparse: struct task_struct * kernel/sched/sched.h:1722:25: sparse: sparse: incompatible types in comparison expression (different address spaces): kernel/sched/sched.h:1722:25: sparse: struct task_struct [noderef] __rcu * kernel/sched/sched.h:1722:25: sparse: struct task_struct * kernel/sched/sched.h:1877:9: sparse: sparse: incompatible types in comparison expression (different address spaces): kernel/sched/sched.h:1877:9: sparse: struct task_struct [noderef] __rcu * kernel/sched/sched.h:1877:9: sparse: struct task_struct * kernel/sched/sched.h:1883:9: sparse: sparse: incompatible types in comparison expression (different address spaces): kernel/sched/sched.h:1883:9: sparse: struct task_struct [noderef] __rcu * kernel/sched/sched.h:1883:9: sparse: struct task_struct * kernel/sched/sched.h:1722:25: sparse: sparse: incompatible types in comparison expression (different address spaces): kernel/sched/sched.h:1722:25: sparse: struct task_struct [noderef] __rcu * kernel/sched/sched.h:1722:25: sparse: struct task_struct * kernel/sched/sched.h:1877:9: sparse: sparse: incompatible types in comparison expression (different address spaces): kernel/sched/sched.h:1877:9: sparse: struct task_struct [noderef] __rcu * kernel/sched/sched.h:1877:9: sparse: struct task_struct * kernel/sched/sched.h:1883:9: sparse: sparse: incompatible types in comparison expression (different address spaces): kernel/sched/sched.h:1883:9: sparse: struct task_struct [noderef] __rcu * kernel/sched/sched.h:1883:9: sparse: struct task_struct * kernel/sched/sched.h:1722:25: sparse: sparse: incompatible types in comparison expression (different address spaces): kernel/sched/sched.h:1722:25: sparse: struct task_struct [noderef] __rcu * kernel/sched/sched.h:1722:25: sparse: struct task_struct * kernel/sched/sched.h:1877:9: sparse: sparse: incompatible types in comparison expression (different address spaces): kernel/sched/sched.h:1877:9: sparse: struct task_struct [noderef] __rcu * kernel/sched/sched.h:1877:9: sparse: struct task_struct * kernel/sched/sched.h:1883:9: sparse: sparse: incompatible types in comparison expression (different address spaces): kernel/sched/sched.h:1883:9: sparse: struct task_struct [noderef] __rcu * kernel/sched/sched.h:1883:9: sparse: struct task_struct * Please review and possibly fold the followup patch. --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org