[zen:6.4/prjc 381/386] kernel/sched/alt_core.c:4128:32: sparse: sparse: incorrect type in argument 2 (different address spaces)

[kernel test robot <lkp@intel.com>]

tree:   https://github.com/zen-kernel/zen-kernel 6.4/prjc
head:   ea6d5107f9aa76407998568ad4cbcf54879ee0c0
commit: 4facf7f6e34125d06a1fc94cbc716e2cb1e09f82 [381/386] sched/alt: [Sync] 223baf9d17f2 sched: Fix performance regression introduced by mm_cid
config: i386-randconfig-i061-20230704 (https://download.01.org/0day-ci/archive/20230707/202307071551.plsRxOGn-lkp@intel.com/config)
compiler: gcc-12 (Debian 12.2.0-14) 12.2.0
reproduce: (https://download.01.org/0day-ci/archive/20230707/202307071551.plsRxOGn-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/202307071551.plsRxOGn-lkp@intel.com/

sparse warnings: (new ones prefixed by >>)
   kernel/sched/alt_core.c:1009:38: 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:1009:38: sparse:     expected struct task_struct *curr
   kernel/sched/alt_core.c:1009:38: sparse:     got struct task_struct [noderef] __rcu *curr
   kernel/sched/alt_core.c:4025:15: sparse: sparse: incompatible types in comparison expression (different address spaces):
   kernel/sched/alt_core.c:4025:15: sparse:    struct task_struct *
   kernel/sched/alt_core.c:4025:15: sparse:    struct task_struct [noderef] __rcu *
>> kernel/sched/alt_core.c:4128:32: sparse: sparse: incorrect type in argument 2 (different address spaces) @@     expected struct task_struct *curr @@     got struct task_struct [noderef] __rcu *curr @@
   kernel/sched/alt_core.c:4128:32: sparse:     expected struct task_struct *curr
   kernel/sched/alt_core.c:4128:32: sparse:     got struct task_struct [noderef] __rcu *curr
   kernel/sched/alt_core.c:4747:14: 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:4747:14: sparse:     expected struct task_struct *prev
   kernel/sched/alt_core.c:4747:14: sparse:     got struct task_struct [noderef] __rcu *curr
   kernel/sched/alt_core.c:5283:17: sparse: sparse: incompatible types in comparison expression (different address spaces):
   kernel/sched/alt_core.c:5283:17: sparse:    struct task_struct *
   kernel/sched/alt_core.c:5283:17: sparse:    struct task_struct [noderef] __rcu *
   kernel/sched/alt_core.c:5433:22: sparse: sparse: incompatible types in comparison expression (different address spaces):
   kernel/sched/alt_core.c:5433:22: sparse:    struct task_struct [noderef] __rcu *
   kernel/sched/alt_core.c:5433:22: sparse:    struct task_struct *
   kernel/sched/alt_core.c:7048:25: 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:7048:25: sparse:     expected struct task_struct *p
   kernel/sched/alt_core.c:7048:25: sparse:     got struct task_struct [noderef] __rcu *curr
   kernel/sched/alt_core.c:536:6: sparse: sparse: context imbalance in 'raw_spin_rq_lock_nested' - wrong count at exit
   kernel/sched/alt_core.c:555:6: sparse: sparse: context imbalance in 'raw_spin_rq_unlock' - unexpected unlock
   kernel/sched/alt_core.c:1157:37: sparse: sparse: incompatible types in comparison expression (different address spaces):
   kernel/sched/alt_core.c:1157:37: sparse:    struct task_struct *
   kernel/sched/alt_core.c:1157:37: sparse:    struct task_struct [noderef] __rcu *
   kernel/sched/alt_core.c:1157:37: sparse: sparse: incompatible types in comparison expression (different address spaces):
   kernel/sched/alt_core.c:1157:37: sparse:    struct task_struct *
   kernel/sched/alt_core.c:1157:37: sparse:    struct task_struct [noderef] __rcu *
   kernel/sched/alt_core.c:1157:37: sparse: sparse: incompatible types in comparison expression (different address spaces):
   kernel/sched/alt_core.c:1157:37: sparse:    struct task_struct *
   kernel/sched/alt_core.c:1157:37: sparse:    struct task_struct [noderef] __rcu *
   kernel/sched/alt_core.c:1157:37: sparse: sparse: incompatible types in comparison expression (different address spaces):
   kernel/sched/alt_core.c:1157:37: sparse:    struct task_struct *
   kernel/sched/alt_core.c:1157:37: sparse:    struct task_struct [noderef] __rcu *
   kernel/sched/alt_core.c:1157:37: sparse: sparse: incompatible types in comparison expression (different address spaces):
   kernel/sched/alt_core.c:1157:37: sparse:    struct task_struct *
   kernel/sched/alt_core.c:1157:37: sparse:    struct task_struct [noderef] __rcu *
   kernel/sched/alt_core.c:1157:37: sparse: sparse: incompatible types in comparison expression (different address spaces):
   kernel/sched/alt_core.c:1157:37: sparse:    struct task_struct *
   kernel/sched/alt_core.c:1157:37: sparse:    struct task_struct [noderef] __rcu *

vim +4128 kernel/sched/alt_core.c

  4104	
  4105	/*
  4106	 * This function gets called by the timer code, with HZ frequency.
  4107	 * We call it with interrupts disabled.
  4108	 */
  4109	void scheduler_tick(void)
  4110	{
  4111		int cpu __maybe_unused = smp_processor_id();
  4112		struct rq *rq = cpu_rq(cpu);
  4113		u64 resched_latency;
  4114	
  4115		if (housekeeping_cpu(cpu, HK_TYPE_TICK))
  4116			arch_scale_freq_tick();
  4117	
  4118		sched_clock_tick();
  4119	
  4120		raw_spin_lock(&rq->lock);
  4121		update_rq_clock(rq);
  4122	
  4123		scheduler_task_tick(rq);
  4124		if (sched_feat(LATENCY_WARN))
  4125			resched_latency = cpu_resched_latency(rq);
  4126		calc_global_load_tick(rq);
  4127	
> 4128		task_tick_mm_cid(rq, rq->curr);
  4129	
  4130		rq->last_tick = rq->clock;
  4131		raw_spin_unlock(&rq->lock);
  4132	
  4133		if (sched_feat(LATENCY_WARN) && resched_latency)
  4134			resched_latency_warn(cpu, resched_latency);
  4135	
  4136		perf_event_task_tick();
  4137	}
  4138	

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