kernel/sched/core.c:881:49: sparse: sparse: incorrect type in argument 2 (different address spaces)

[kernel test robot]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   9702969978695d9a699a1f34771580cdbb153b33
commit: e38e5299747b23015b00b0109891815db44a2f30 sched/hrtick: Fix hrtick() vs. scheduling context
date:   2 months ago
config: i386-randconfig-063-20260215 (https://download.01.org/0day-ci/archive/20260217/202602171024.7LU9yYC8-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/20260217/202602171024.7LU9yYC8-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/202602171024.7LU9yYC8-lkp@xxxxxxxxx/

sparse warnings: (new ones prefixed by >>)
   kernel/sched/core.c:330:56: sparse: sparse: incompatible types in comparison expression (different address spaces):
   kernel/sched/core.c:330:56: sparse:    struct task_struct [noderef] __rcu *
   kernel/sched/core.c:330:56: sparse:    struct task_struct *
   kernel/sched/core.c:805:33: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected struct task_struct *task @@     got struct task_struct [noderef] __rcu *curr @@
   kernel/sched/core.c:805:33: sparse:     expected struct task_struct *task
   kernel/sched/core.c:805:33: sparse:     got struct task_struct [noderef] __rcu *curr
>> kernel/sched/core.c:881:49: sparse: sparse: incorrect type in argument 2 (different address spaces) @@     expected struct task_struct *p @@     got struct task_struct [noderef] __rcu *donor @@
   kernel/sched/core.c:881:49: sparse:     expected struct task_struct *p
   kernel/sched/core.c:881:49: sparse:     got struct task_struct [noderef] __rcu *donor
   kernel/sched/core.c:1101:38: 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:1101:38: sparse:     expected struct task_struct *curr
   kernel/sched/core.c:1101:38: sparse:     got struct task_struct [noderef] __rcu *curr
   kernel/sched/core.c:2175:39: sparse: sparse: incorrect type in initializer (different address spaces) @@     expected struct task_struct *donor @@     got struct task_struct [noderef] __rcu *donor @@
   kernel/sched/core.c:2175:39: sparse:     expected struct task_struct *donor
   kernel/sched/core.c:2175:39: sparse:     got struct task_struct [noderef] __rcu *donor
   kernel/sched/core.c:2186:65: 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:2186:65: sparse:     expected struct task_struct *tsk
   kernel/sched/core.c:2186:65: sparse:     got struct task_struct [noderef] __rcu *curr
   kernel/sched/core.c:3583:17: 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:3583:17: sparse:     expected struct sched_domain *[assigned] sd
   kernel/sched/core.c:3583:17: sparse:     got struct sched_domain [noderef] __rcu *parent
   kernel/sched/core.c:3788:36: 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:3788:36: sparse:     expected struct task_struct const *p
   kernel/sched/core.c:3788:36: sparse:     got struct task_struct [noderef] __rcu *curr
   kernel/sched/core.c:8065:43: 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:8065:43: sparse:     expected struct task_struct *push_task
   kernel/sched/core.c:8065:43: sparse:     got struct task_struct [noderef] __rcu *curr
   kernel/sched/core.c:5512:15: sparse: sparse: incorrect type in assignment (different address spaces) @@     expected struct task_struct *donor @@     got struct task_struct [noderef] __rcu *donor @@
   kernel/sched/core.c:5512:15: sparse:     expected struct task_struct *donor
   kernel/sched/core.c:5512:15: sparse:     got struct task_struct [noderef] __rcu *donor
   kernel/sched/core.c:6180:32: sparse: sparse: incompatible types in comparison expression (different address spaces):
   kernel/sched/core.c:6180:32: sparse:    struct task_struct [noderef] __rcu *
   kernel/sched/core.c:6180:32: sparse:    struct task_struct *
   kernel/sched/core.c:6211:23: sparse: sparse: incompatible types in comparison expression (different address spaces):
   kernel/sched/core.c:6211:23: sparse:    struct task_struct [noderef] __rcu *
   kernel/sched/core.c:6211:23: sparse:    struct task_struct *
   kernel/sched/core.c:6219:46: sparse: sparse: incompatible types in comparison expression (different address spaces):
   kernel/sched/core.c:6219:46: sparse:    struct task_struct *
   kernel/sched/core.c:6219:46: sparse:    struct task_struct [noderef] __rcu *
   kernel/sched/core.c:6276:9: 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:6276:9: sparse:     expected struct sched_domain *[assigned] sd
   kernel/sched/core.c:6276:9: sparse:     got struct sched_domain [noderef] __rcu *parent
   kernel/sched/core.c:6730:14: 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:6730:14: sparse:     expected struct task_struct *prev
   kernel/sched/core.c:6730:14: sparse:     got struct task_struct [noderef] __rcu *curr
   kernel/sched/core.c:6797:37: sparse: sparse: incorrect type in argument 2 (different address spaces) @@     expected struct task_struct *prev @@     got struct task_struct [noderef] __rcu *donor @@
   kernel/sched/core.c:6797:37: sparse:     expected struct task_struct *prev
   kernel/sched/core.c:6797:37: sparse:     got struct task_struct [noderef] __rcu *donor
   kernel/sched/core.c:7303:17: sparse: sparse: incompatible types in comparison expression (different address spaces):
   kernel/sched/core.c:7303:17: sparse:    struct task_struct *
   kernel/sched/core.c:7303:17: sparse:    struct task_struct [noderef] __rcu *
   kernel/sched/core.c:10207:25: 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:10207:25: sparse:     expected struct task_struct *p
   kernel/sched/core.c:10207:25: sparse:     got struct task_struct [noderef] __rcu *curr
   kernel/sched/core.c:404:9: sparse: sparse: context imbalance in 'sched_core_lock' - different lock contexts for basic block
   kernel/sched/core.c:414:17: sparse: sparse: context imbalance in 'sched_core_unlock' - unexpected unlock
   kernel/sched/core.c:632:6: sparse: sparse: context imbalance in 'raw_spin_rq_lock_nested' - wrong count at exit
   kernel/sched/core.c:657:6: sparse: sparse: context imbalance in 'raw_spin_rq_trylock' - wrong count at exit
   kernel/sched/core.c:681:6: sparse: sparse: context imbalance in 'raw_spin_rq_unlock' - unexpected unlock
   kernel/sched/core.c: note: in included file:
   kernel/sched/sched.h:1808:9: sparse: sparse: context imbalance in '__task_rq_lock' - wrong count at exit
   kernel/sched/sched.h:1808:9: sparse: sparse: context imbalance in 'task_rq_lock' - wrong count at exit
   kernel/sched/core.c: note: in included file:
   kernel/sched/pelt.h:102:13: 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:102:13: sparse:     expected struct task_struct const *p
   kernel/sched/pelt.h:102:13: sparse:     got struct task_struct [noderef] __rcu *curr
   kernel/sched/core.c:881:11: sparse: sparse: dereference of noderef expression
   kernel/sched/core.c:2256:35: sparse: sparse: context imbalance in 'wait_task_inactive' - different lock contexts for basic block
   kernel/sched/core.c: note: in included file:
   kernel/sched/sched.h:2302:26: sparse: sparse: incompatible types in comparison expression (different address spaces):
   kernel/sched/sched.h:2302:26: sparse:    struct task_struct [noderef] __rcu *
   kernel/sched/sched.h:2302:26: sparse:    struct task_struct *
   kernel/sched/sched.h:2291:25: sparse: sparse: incompatible types in comparison expression (different address spaces):
   kernel/sched/sched.h:2291:25: sparse:    struct task_struct [noderef] __rcu *
   kernel/sched/sched.h:2291:25: sparse:    struct task_struct *
   kernel/sched/core.c:2170:38: sparse: sparse: incompatible types in comparison expression (different address spaces):
   kernel/sched/core.c:2170:38: sparse:    struct task_struct [noderef] __rcu *
   kernel/sched/core.c:2170:38: sparse:    struct task_struct const *
   kernel/sched/sched.h:2302:26: sparse: sparse: incompatible types in comparison expression (different address spaces):
   kernel/sched/sched.h:2302:26: sparse:    struct task_struct [noderef] __rcu *
   kernel/sched/sched.h:2302:26: sparse:    struct task_struct *
   kernel/sched/sched.h:2635:9: sparse: sparse: incompatible types in comparison expression (different address spaces):
   kernel/sched/sched.h:2635:9: sparse:    struct task_struct [noderef] __rcu *
   kernel/sched/sched.h:2635:9: sparse:    struct task_struct *
   kernel/sched/sched.h:2635:9: sparse: sparse: incompatible types in comparison expression (different address spaces):
   kernel/sched/sched.h:2635:9: sparse:    struct task_struct [noderef] __rcu *
   kernel/sched/sched.h:2635:9: sparse:    struct task_struct *
   kernel/sched/sched.h:2635:9: sparse: sparse: incompatible types in comparison expression (different address spaces):
   kernel/sched/sched.h:2635:9: sparse:    struct task_struct [noderef] __rcu *
   kernel/sched/sched.h:2635:9: sparse:    struct task_struct *
   kernel/sched/sched.h:2635:9: sparse: sparse: incompatible types in comparison expression (different address spaces):
   kernel/sched/sched.h:2635:9: sparse:    struct task_struct [noderef] __rcu *
   kernel/sched/sched.h:2635:9: sparse:    struct task_struct *
   kernel/sched/sched.h:2635:9: sparse: sparse: incompatible types in comparison expression (different address spaces):
   kernel/sched/sched.h:2635:9: sparse:    struct task_struct [noderef] __rcu *
   kernel/sched/sched.h:2635:9: sparse:    struct task_struct *
   kernel/sched/sched.h:2635:9: sparse: sparse: incompatible types in comparison expression (different address spaces):
   kernel/sched/sched.h:2635:9: sparse:    struct task_struct [noderef] __rcu *
   kernel/sched/sched.h:2635:9: sparse:    struct task_struct *
   kernel/sched/sched.h:2635:9: sparse: sparse: incompatible types in comparison expression (different address spaces):
   kernel/sched/sched.h:2635:9: sparse:    struct task_struct [noderef] __rcu *
   kernel/sched/sched.h:2635:9: sparse:    struct task_struct *
   kernel/sched/sched.h:2635:9: sparse: sparse: incompatible types in comparison expression (different address spaces):
   kernel/sched/sched.h:2635:9: sparse:    struct task_struct [noderef] __rcu *
   kernel/sched/sched.h:2635:9: sparse:    struct task_struct *
   kernel/sched/sched.h:2302:26: sparse: sparse: incompatible types in comparison expression (different address spaces):
   kernel/sched/sched.h:2302:26: sparse:    struct task_struct [noderef] __rcu *

vim +881 kernel/sched/core.c

   867	
   868	/*
   869	 * High-resolution timer tick.
   870	 * Runs from hardirq context with interrupts disabled.
   871	 */
   872	static enum hrtimer_restart hrtick(struct hrtimer *timer)
   873	{
   874		struct rq *rq = container_of(timer, struct rq, hrtick_timer);
   875		struct rq_flags rf;
   876	
   877		WARN_ON_ONCE(cpu_of(rq) != smp_processor_id());
   878	
   879		rq_lock(rq, &rf);
   880		update_rq_clock(rq);
 > 881		rq->donor->sched_class->task_tick(rq, rq->donor, 1);
   882		rq_unlock(rq, &rf);
   883	
   884		return HRTIMER_NORESTART;
   885	}
   886	

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