[zen:7.2/prjc 648/740] kernel/sched/alt_core.c:2505:36: sparse: sparse: incorrect type in argument 1 (different address spaces)

[zen:7.2/prjc 648/740] kernel/sched/alt_core.c:2505:36: sparse: sparse: incorrect type in argument 1 (different address spaces)

[kernel test robot]

Hi Alfred,

First bad commit (maybe != root cause):

tree:   https://github.com/zen-kernel/zen-kernel 7.2/prjc
head:   b735d8ec47d31db8e62d1925521a44d98c1cac2d
commit: ca8e0fde64fcfaf8691f1aa16d875770a5896ca5 [648/740] sched/alt: [Sync] dcb7416212e6 block: invalidate cached plug timestamp after task switch
config: parisc-randconfig-r121-20260819 (https://download.01.org/0day-ci/archive/20260819/202608191655.oItu36D1-lkp@intel.com/config)
compiler: hppa-linux-gcc (GCC) 16.1.0
sparse: v0.6.5-rc1
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260819/202608191655.oItu36D1-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@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202608191655.oItu36D1-lkp@intel.com/

sparse warnings: (new ones prefixed by >>)
   kernel/sched/alt_core.c:109:1: sparse: sparse: symbol '__pcpu_scope_sched_cpu_topo_end_mask' was not declared. Should it be static?
>> kernel/sched/alt_core.c:2505:36: 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/alt_core.c:2505:36: sparse:     expected struct task_struct const *p
   kernel/sched/alt_core.c:2505:36: sparse:     got struct task_struct [noderef] __rcu *curr
>> kernel/sched/alt_core.c:5859:43: sparse: sparse: incorrect type in initializer (different address spaces) @@     expected struct task_struct *push_task @@     got struct task_struct [noderef] __rcu *curr @@
   kernel/sched/alt_core.c:5859:43: sparse:     expected struct task_struct *push_task
   kernel/sched/alt_core.c:5859:43: sparse:     got struct task_struct [noderef] __rcu *curr
>> kernel/sched/alt_core.c:3916:15: sparse: sparse: incompatible types in comparison expression (different address spaces):
   kernel/sched/alt_core.c:3916:15: sparse:    struct task_struct *
   kernel/sched/alt_core.c:3916:15: sparse:    struct task_struct [noderef] __rcu *
>> kernel/sched/alt_core.c:4000:38: sparse: sparse: incorrect type in initializer (different address spaces) @@     expected struct task_struct *curr @@     got struct task_struct [noderef] __rcu *curr @@
   kernel/sched/alt_core.c:4000:38: sparse:     expected struct task_struct *curr
   kernel/sched/alt_core.c:4000:38: sparse:     got struct task_struct [noderef] __rcu *curr
>> kernel/sched/alt_core.c:4644:14: sparse: sparse: incorrect type in assignment (different address spaces) @@     expected struct task_struct *prev @@     got struct task_struct [noderef] __rcu *curr @@
   kernel/sched/alt_core.c:4644:14: sparse:     expected struct task_struct *prev
   kernel/sched/alt_core.c:4644:14: sparse:     got struct task_struct [noderef] __rcu *curr
   kernel/sched/alt_core.c:5170:17: sparse: sparse: incompatible types in comparison expression (different address spaces):
   kernel/sched/alt_core.c:5170:17: sparse:    struct task_struct *
   kernel/sched/alt_core.c:5170:17: sparse:    struct task_struct [noderef] __rcu *
>> kernel/sched/alt_core.c:5716:25: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected struct task_struct *p @@     got struct task_struct [noderef] __rcu *curr @@
   kernel/sched/alt_core.c:5716:25: sparse:     expected struct task_struct *p
   kernel/sched/alt_core.c:5716:25: sparse:     got struct task_struct [noderef] __rcu *curr
   kernel/sched/alt_core.c:923:38: sparse: sparse: incorrect type in initializer (different address spaces) @@     expected struct task_struct *curr @@     got struct task_struct [noderef] __rcu *curr @@
   kernel/sched/alt_core.c:923:38: sparse:     expected struct task_struct *curr
   kernel/sched/alt_core.c:923:38: sparse:     got struct task_struct [noderef] __rcu *curr
   kernel/sched/alt_core.c:923:38: sparse: sparse: incorrect type in initializer (different address spaces) @@     expected struct task_struct *curr @@     got struct task_struct [noderef] __rcu *curr @@
   kernel/sched/alt_core.c:923:38: sparse:     expected struct task_struct *curr
   kernel/sched/alt_core.c:923:38: sparse:     got struct task_struct [noderef] __rcu *curr
   kernel/sched/alt_core.c:1141:37: sparse: sparse: incompatible types in comparison expression (different address spaces):
   kernel/sched/alt_core.c:1141:37: sparse:    struct task_struct *
   kernel/sched/alt_core.c:1141:37: sparse:    struct task_struct [noderef] __rcu *
   kernel/sched/alt_core.c:1831:38: sparse: sparse: incompatible types in comparison expression (different address spaces):
   kernel/sched/alt_core.c:1831:38: sparse:    struct task_struct [noderef] __rcu *
   kernel/sched/alt_core.c:1831:38: sparse:    struct task_struct const *
   kernel/sched/alt_core.c:1141:37: sparse: sparse: incompatible types in comparison expression (different address spaces):
   kernel/sched/alt_core.c:1141:37: sparse:    struct task_struct *
   kernel/sched/alt_core.c:1141:37: sparse:    struct task_struct [noderef] __rcu *
   kernel/sched/alt_core.c:1141:37: sparse: sparse: incompatible types in comparison expression (different address spaces):
   kernel/sched/alt_core.c:1141:37: sparse:    struct task_struct *
   kernel/sched/alt_core.c:1141:37: sparse:    struct task_struct [noderef] __rcu *
   kernel/sched/alt_core.c:1141:37: sparse: sparse: incompatible types in comparison expression (different address spaces):
   kernel/sched/alt_core.c:1141:37: sparse:    struct task_struct *
   kernel/sched/alt_core.c:1141:37: sparse:    struct task_struct [noderef] __rcu *
   kernel/sched/alt_core.c:1141:37: sparse: sparse: incompatible types in comparison expression (different address spaces):
   kernel/sched/alt_core.c:1141:37: sparse:    struct task_struct *
   kernel/sched/alt_core.c:1141:37: sparse:    struct task_struct [noderef] __rcu *
   kernel/sched/alt_core.c: note: in included file (through kernel/sched/sched.h):
   kernel/sched/alt_sched.h:333:25: sparse: sparse: incompatible types in comparison expression (different address spaces):
   kernel/sched/alt_sched.h:333:25: sparse:    struct task_struct [noderef] __rcu *
   kernel/sched/alt_sched.h:333:25: sparse:    struct task_struct *
   kernel/sched/alt_core.c:1141:37: sparse: sparse: incompatible types in comparison expression (different address spaces):
   kernel/sched/alt_core.c:1141:37: sparse:    struct task_struct *
   kernel/sched/alt_core.c:1141:37: sparse:    struct task_struct [noderef] __rcu *
   kernel/sched/alt_sched.h:333:25: sparse: sparse: incompatible types in comparison expression (different address spaces):
   kernel/sched/alt_sched.h:333:25: sparse:    struct task_struct [noderef] __rcu *
   kernel/sched/alt_sched.h:333:25: sparse:    struct task_struct *
   kernel/sched/alt_core.c:1141:37: sparse: sparse: incompatible types in comparison expression (different address spaces):
   kernel/sched/alt_core.c:1141:37: sparse:    struct task_struct *
   kernel/sched/alt_core.c:1141:37: sparse:    struct task_struct [noderef] __rcu *

vim +2505 kernel/sched/alt_core.c

af93eb24c6d418 Alfred Chen 2020-07-31  2497  
2f7ec82370cbb7 Alfred Chen 2019-08-19  2498  void wake_up_if_idle(int cpu)
2f7ec82370cbb7 Alfred Chen 2019-08-19  2499  {
2f7ec82370cbb7 Alfred Chen 2019-08-19  2500  	struct rq *rq = cpu_rq(cpu);
2f7ec82370cbb7 Alfred Chen 2019-08-19  2501  
df026c771d2990 Alfred Chen 2024-01-05  2502  	guard(rcu)();
df026c771d2990 Alfred Chen 2024-01-05  2503  	if (is_idle_task(rcu_dereference(rq->curr))) {
df026c771d2990 Alfred Chen 2024-01-05  2504  		guard(raw_spinlock_irqsave)(&rq->lock);
2f7ec82370cbb7 Alfred Chen 2019-08-19 @2505  		if (is_idle_task(rq->curr))
cf9228cdcb66d4 Alfred Chen 2022-03-26  2506  			resched_curr(rq);
df026c771d2990 Alfred Chen 2024-01-05  2507  	}
2f7ec82370cbb7 Alfred Chen 2019-08-19  2508  }
2f7ec82370cbb7 Alfred Chen 2019-08-19  2509  

:::::: The code at line 2505 was first introduced by commit
:::::: 2f7ec82370cbb705e7e10f67ae48bb5f5033deb4 Project C v5.7.5-r2

:::::: TO: Alfred Chen <cchalpha@gmail.com>
:::::: CC: Alfred Chen <cchalpha@gmail.com>

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