kernel/sched/fair.c:1203:39: sparse: sparse: incorrect type in initializer (different address spaces)

[kernel test robot]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   0f2acd3148e0ef42bdacbd477f90e8533f96b2ac
commit: af0c8b2bf67b25756f27644936e74fd9a6273bd2 sched: Split scheduler and execution contexts
date:   1 year, 4 months ago
config: i386-randconfig-062-20260216 (https://download.01.org/0day-ci/archive/20260217/202602170126.C1jPrrS3-lkp@xxxxxxxxx/config)
compiler: clang version 20.1.8 (https://github.com/llvm/llvm-project 87f0227cb60147a26a1eeb4fb06e3b505e9c7261)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260217/202602170126.C1jPrrS3-lkp@xxxxxxxxx/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@xxxxxxxxx>
| Closes: https://lore.kernel.org/oe-kbuild-all/202602170126.C1jPrrS3-lkp@xxxxxxxxx/

sparse warnings: (new ones prefixed by >>)
>> kernel/sched/fair.c:1203:39: sparse: sparse: incorrect type in initializer (different address spaces) @@     expected struct task_struct *donor @@     got struct task_struct [noderef] __rcu *donor @@
   kernel/sched/fair.c:1203:39: sparse:     expected struct task_struct *donor
   kernel/sched/fair.c:1203:39: sparse:     got struct task_struct [noderef] __rcu *donor
   kernel/sched/fair.c:1261:34: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected struct sched_entity const *se @@     got struct sched_entity [noderef] __rcu * @@
   kernel/sched/fair.c:1261:34: sparse:     expected struct sched_entity const *se
   kernel/sched/fair.c:1261:34: sparse:     got struct sched_entity [noderef] __rcu *
   kernel/sched/fair.c:12772:9: 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:12772:9: sparse:     expected struct sched_domain *[assigned] sd
   kernel/sched/fair.c:12772:9: sparse:     got struct sched_domain [noderef] __rcu *parent
   kernel/sched/fair.c:6103:22: sparse: sparse: incompatible types in comparison expression (different address spaces):
   kernel/sched/fair.c:6103:22: sparse:    struct task_struct [noderef] __rcu *
   kernel/sched/fair.c:6103:22: sparse:    struct task_struct *
   kernel/sched/fair.c:7036:58: sparse: sparse: incorrect type in argument 2 (different address spaces) @@     expected struct task_struct *p @@     got struct task_struct [noderef] __rcu *curr @@
   kernel/sched/fair.c:7036:58: sparse:     expected struct task_struct *p
   kernel/sched/fair.c:7036:58: sparse:     got struct task_struct [noderef] __rcu *curr
   kernel/sched/fair.c:8404:20: 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:8404:20: sparse:     expected struct sched_domain *[assigned] sd
   kernel/sched/fair.c:8404:20: sparse:     got struct sched_domain [noderef] __rcu *parent
   kernel/sched/fair.c:8608:9: 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:8608:9: sparse:     expected struct sched_domain *[assigned] tmp
   kernel/sched/fair.c:8608:9: sparse:     got struct sched_domain [noderef] __rcu *parent
   kernel/sched/fair.c:8753:39: sparse: sparse: incorrect type in initializer (different address spaces) @@     expected struct task_struct *donor @@     got struct task_struct [noderef] __rcu *donor @@
   kernel/sched/fair.c:8753:39: sparse:     expected struct task_struct *donor
   kernel/sched/fair.c:8753:39: sparse:     got struct task_struct [noderef] __rcu *donor
   kernel/sched/fair.c:8784:37: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected struct task_struct *tsk @@     got struct task_struct [noderef] __rcu *curr @@
   kernel/sched/fair.c:8784:37: sparse:     expected struct task_struct *tsk
   kernel/sched/fair.c:8784:37: sparse:     got struct task_struct [noderef] __rcu *curr
   kernel/sched/fair.c:8995:38: 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:8995:38: sparse:     expected struct task_struct *curr
   kernel/sched/fair.c:8995:38: sparse:     got struct task_struct [noderef] __rcu *curr
   kernel/sched/fair.c:9966:40: 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:9966:40: sparse:     expected struct sched_domain *child
   kernel/sched/fair.c:9966:40: sparse:     got struct sched_domain [noderef] __rcu *child
   kernel/sched/fair.c:10588:22: sparse: sparse: incompatible types in comparison expression (different address spaces):
   kernel/sched/fair.c:10588:22: sparse:    struct task_struct [noderef] __rcu *
   kernel/sched/fair.c:10588:22: sparse:    struct task_struct *
   kernel/sched/fair.c:12011:9: 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:12011:9: sparse:     expected struct sched_domain *[assigned] sd
   kernel/sched/fair.c:12011:9: sparse:     got struct sched_domain [noderef] __rcu *parent
   kernel/sched/fair.c:11661:44: 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:11661:44: sparse:     expected struct sched_domain *sd_parent
   kernel/sched/fair.c:11661:44: sparse:     got struct sched_domain [noderef] __rcu *parent
   kernel/sched/fair.c:12120:9: 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:12120:9: sparse:     expected struct sched_domain *[assigned] sd
   kernel/sched/fair.c:12120:9: sparse:     got struct sched_domain [noderef] __rcu *parent
   kernel/sched/fair.c:7517:28: sparse: sparse: incorrect type in assignment (different address spaces) @@     expected struct sched_domain *sd @@     got struct sched_domain [noderef] __rcu *child @@
   kernel/sched/fair.c:7517:28: sparse:     expected struct sched_domain *sd
   kernel/sched/fair.c:7517:28: sparse:     got struct sched_domain [noderef] __rcu *child
   kernel/sched/fair.c:7523:28: sparse: sparse: incorrect type in assignment (different address spaces) @@     expected struct sched_domain *sd @@     got struct sched_domain [noderef] __rcu *child @@
   kernel/sched/fair.c:7523:28: sparse:     expected struct sched_domain *sd
   kernel/sched/fair.c:7523:28: sparse:     got struct sched_domain [noderef] __rcu *child
   kernel/sched/fair.c:7530:28: sparse: sparse: incorrect type in assignment (different address spaces) @@     expected struct sched_domain *sd @@     got struct sched_domain [noderef] __rcu *child @@
   kernel/sched/fair.c:7530:28: sparse:     expected struct sched_domain *sd
   kernel/sched/fair.c:7530:28: sparse:     got struct sched_domain [noderef] __rcu *child
   kernel/sched/fair.c:7538:17: 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:7538:17: sparse:     expected struct sched_domain *[assigned] tmp
   kernel/sched/fair.c:7538:17: sparse:     got struct sched_domain [noderef] __rcu *parent
   kernel/sched/fair.c:8692:9: sparse: sparse: context imbalance in 'task_dead_fair' - wrong count at exit
   kernel/sched/fair.c: note: in included file:
   kernel/sched/sched.h:2496:9: sparse: sparse: incompatible types in comparison expression (different address spaces):
   kernel/sched/sched.h:2496:9: sparse:    struct task_struct [noderef] __rcu *
   kernel/sched/sched.h:2496:9: sparse:    struct task_struct *
   kernel/sched/sched.h:2287:26: sparse: sparse: incompatible types in comparison expression (different address spaces):
   kernel/sched/sched.h:2287:26: sparse:    struct task_struct [noderef] __rcu *
   kernel/sched/sched.h:2287:26: sparse:    struct task_struct *
   kernel/sched/sched.h:2287:26: sparse: sparse: incompatible types in comparison expression (different address spaces):
   kernel/sched/sched.h:2287:26: sparse:    struct task_struct [noderef] __rcu *
   kernel/sched/sched.h:2287:26: sparse:    struct task_struct *

vim +1203 kernel/sched/fair.c

  1197	
  1198	/*
  1199	 * Used by other classes to account runtime.
  1200	 */
  1201	s64 update_curr_common(struct rq *rq)
  1202	{
> 1203		struct task_struct *donor = rq->donor;
  1204		s64 delta_exec;
  1205	
  1206		delta_exec = update_curr_se(rq, &donor->se);
  1207		if (likely(delta_exec > 0))
  1208			update_curr_task(donor, delta_exec);
  1209	
  1210		return delta_exec;
  1211	}
  1212	

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