linux-kernel - kernel/sched/fair.c:1201:33: sparse: sparse: incorrect type in argument 2 (different address spaces)

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Message-ID: <202512120624.mlbF5q4a-lkp@intel.com>
Date: Fri, 12 Dec 2025 06:57:19 +0800
From: kernel test robot <lkp@...el.com>
To: John Stultz <jstultz@...gle.com>
Cc: oe-kbuild-all@...ts.linux.dev, linux-kernel@...r.kernel.org,
	Peter Zijlstra <peterz@...radead.org>
Subject: kernel/sched/fair.c:1201:33: sparse: sparse: incorrect type in
 argument 2 (different address spaces)

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   d358e5254674b70f34c847715ca509e46eb81e6f
commit: aa4f74dfd42ba4399f785fb9c460a11bd1756f0a sched: Fix runtime accounting w/ split exec & sched contexts
date:   5 months ago
config: sh-randconfig-r131-20251211 (https://download.01.org/0day-ci/archive/20251212/202512120624.mlbF5q4a-lkp@intel.com/config)
compiler: sh4-linux-gcc (GCC) 15.1.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251212/202512120624.mlbF5q4a-lkp@intel.com/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@...el.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202512120624.mlbF5q4a-lkp@intel.com/

sparse warnings: (new ones prefixed by >>)
   kernel/sched/fair.c:1167:49: sparse: sparse: incorrect type in initializer (different address spaces) @@     expected struct task_struct *running @@     got struct task_struct [noderef] __rcu *curr @@
   kernel/sched/fair.c:1167:49: sparse:     expected struct task_struct *running
   kernel/sched/fair.c:1167:49: sparse:     got struct task_struct [noderef] __rcu *curr
>> kernel/sched/fair.c:1201:33: sparse: sparse: incorrect type in argument 2 (different address spaces) @@     expected struct sched_entity *se @@     got struct sched_entity [noderef] __rcu * @@
   kernel/sched/fair.c:1201:33: sparse:     expected struct sched_entity *se
   kernel/sched/fair.c:1201:33: sparse:     got struct sched_entity [noderef] __rcu *
   kernel/sched/fair.c:1259:34: 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:1259:34: sparse:     expected struct sched_entity const *se
   kernel/sched/fair.c:1259:34: sparse:     got struct sched_entity [noderef] __rcu *
   kernel/sched/fair.c:12744:9: 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:12744:9: sparse:     expected struct sched_domain *[assigned] sd
   kernel/sched/fair.c:12744:9: sparse:     got struct sched_domain [noderef] __rcu *parent
   kernel/sched/fair.c:5995:22: sparse: sparse: incompatible types in comparison expression (different address spaces):
   kernel/sched/fair.c:5995:22: sparse:    struct task_struct [noderef] __rcu *
   kernel/sched/fair.c:5995:22: sparse:    struct task_struct *
   kernel/sched/fair.c:6715:39: 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:6715:39: sparse:     expected struct task_struct *donor
   kernel/sched/fair.c:6715:39: sparse:     got struct task_struct [noderef] __rcu *donor
   kernel/sched/fair.c:6920:58: 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:6920:58: sparse:     expected struct task_struct *p
   kernel/sched/fair.c:6920:58: sparse:     got struct task_struct [noderef] __rcu *curr
   kernel/sched/fair.c:8302:20: 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:8302:20: sparse:     expected struct sched_domain *[assigned] sd
   kernel/sched/fair.c:8302:20: sparse:     got struct sched_domain [noderef] __rcu *parent
   kernel/sched/fair.c:8506:9: 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:8506:9: sparse:     expected struct sched_domain *[assigned] tmp
   kernel/sched/fair.c:8506:9: sparse:     got struct sched_domain [noderef] __rcu *parent
   kernel/sched/fair.c:8648:39: 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:8648:39: sparse:     expected struct task_struct *donor
   kernel/sched/fair.c:8648:39: sparse:     got struct task_struct [noderef] __rcu *donor
   kernel/sched/fair.c:8680:37: 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:8680:37: sparse:     expected struct task_struct *tsk
   kernel/sched/fair.c:8680:37: sparse:     got struct task_struct [noderef] __rcu *curr
   kernel/sched/fair.c:8900:38: 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:8900:38: sparse:     expected struct task_struct *curr
   kernel/sched/fair.c:8900:38: sparse:     got struct task_struct [noderef] __rcu *curr
   kernel/sched/fair.c:9917:40: 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:9917:40: sparse:     expected struct sched_domain *child
   kernel/sched/fair.c:9917:40: sparse:     got struct sched_domain [noderef] __rcu *child
   kernel/sched/fair.c:10545:22: sparse: sparse: incompatible types in comparison expression (different address spaces):
   kernel/sched/fair.c:10545:22: sparse:    struct task_struct [noderef] __rcu *
   kernel/sched/fair.c:10545:22: sparse:    struct task_struct *
   kernel/sched/fair.c:11990:9: 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:11990:9: sparse:     expected struct sched_domain *[assigned] sd
   kernel/sched/fair.c:11990:9: sparse:     got struct sched_domain [noderef] __rcu *parent
   kernel/sched/fair.c:11640:44: 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:11640:44: sparse:     expected struct sched_domain *sd_parent
   kernel/sched/fair.c:11640:44: sparse:     got struct sched_domain [noderef] __rcu *parent
   kernel/sched/fair.c:12105:9: 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:12105:9: sparse:     expected struct sched_domain *[assigned] sd
   kernel/sched/fair.c:12105:9: sparse:     got struct sched_domain [noderef] __rcu *parent
   kernel/sched/fair.c:6191:17: sparse: sparse: context imbalance in 'do_sched_cfs_period_timer' - unexpected unlock
   kernel/sched/fair.c: note: in included file:
   kernel/sched/sched.h:2262:26: sparse: sparse: incompatible types in comparison expression (different address spaces):
   kernel/sched/sched.h:2262:26: sparse:    struct task_struct [noderef] __rcu *
   kernel/sched/sched.h:2262:26: sparse:    struct task_struct *
   kernel/sched/sched.h:2462:9: sparse: sparse: incompatible types in comparison expression (different address spaces):
   kernel/sched/sched.h:2462:9: sparse:    struct task_struct [noderef] __rcu *
   kernel/sched/sched.h:2462:9: sparse:    struct task_struct *
   kernel/sched/sched.h:2262:26: sparse: sparse: incompatible types in comparison expression (different address spaces):
   kernel/sched/sched.h:2262:26: sparse:    struct task_struct [noderef] __rcu *
   kernel/sched/sched.h:2262:26: sparse:    struct task_struct *
   kernel/sched/sched.h:2262:26: sparse: sparse: incompatible types in comparison expression (different address spaces):
   kernel/sched/sched.h:2262:26: sparse:    struct task_struct [noderef] __rcu *
   kernel/sched/sched.h:2262:26: sparse:    struct task_struct *

vim +1201 kernel/sched/fair.c

  1195	
  1196	/*
  1197	 * Used by other classes to account runtime.
  1198	 */
  1199	s64 update_curr_common(struct rq *rq)
  1200	{
> 1201		return update_se(rq, &rq->donor->se);
  1202	}
  1203	

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