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Message-ID: <202512230415.0RatyaQF-lkp@intel.com>
Date: Tue, 23 Dec 2025 05:12:38 +0800
From: kernel test robot <lkp@...el.com>
To: Wanpeng Li <kernellwp@...il.com>, Peter Zijlstra <peterz@...radead.org>,
Ingo Molnar <mingo@...hat.com>,
Thomas Gleixner <tglx@...utronix.de>,
Paolo Bonzini <pbonzini@...hat.com>,
Sean Christopherson <seanjc@...gle.com>
Cc: oe-kbuild-all@...ts.linux.dev, K Prateek Nayak <kprateek.nayak@....com>,
Christian Borntraeger <borntraeger@...ux.ibm.com>,
Steven Rostedt <rostedt@...dmis.org>,
Vincent Guittot <vincent.guittot@...aro.org>,
Juri Lelli <juri.lelli@...hat.com>, linux-kernel@...r.kernel.org,
kvm@...r.kernel.org, Wanpeng Li <wanpengli@...cent.com>
Subject: Re: [PATCH v2 2/9] sched/fair: Add rate-limiting and validation
helpers
Hi Wanpeng,
kernel test robot noticed the following build warnings:
[auto build test WARNING on kvm/queue]
[also build test WARNING on kvm/next tip/sched/core peterz-queue/sched/core tip/master linus/master v6.19-rc2 next-20251219]
[cannot apply to kvm/linux-next tip/auto-latest]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]
url: https://github.com/intel-lab-lkp/linux/commits/Wanpeng-Li/sched-fair-Add-rate-limiting-and-validation-helpers/20251219-125353
base: https://git.kernel.org/pub/scm/virt/kvm/kvm.git queue
patch link: https://lore.kernel.org/r/20251219035334.39790-3-kernellwp%40gmail.com
patch subject: [PATCH v2 2/9] sched/fair: Add rate-limiting and validation helpers
config: openrisc-randconfig-r122-20251221 (https://download.01.org/0day-ci/archive/20251223/202512230415.0RatyaQF-lkp@intel.com/config)
compiler: or1k-linux-gcc (GCC) 15.1.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251223/202512230415.0RatyaQF-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/202512230415.0RatyaQF-lkp@intel.com/
sparse warnings: (new ones prefixed by >>)
kernel/sched/fair.c:1158:49: 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:1158:49: sparse: expected struct task_struct *running
kernel/sched/fair.c:1158:49: sparse: got struct task_struct [noderef] __rcu *curr
kernel/sched/fair.c:1194:33: 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:1194:33: sparse: expected struct sched_entity *se
kernel/sched/fair.c:1194:33: sparse: got struct sched_entity [noderef] __rcu *
kernel/sched/fair.c:1250:34: 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:1250:34: sparse: expected struct sched_entity const *se
kernel/sched/fair.c:1250:34: sparse: got struct sched_entity [noderef] __rcu *
kernel/sched/fair.c:12991:9: 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:12991:9: sparse: expected struct sched_domain *[assigned] sd
kernel/sched/fair.c:12991:9: sparse: got struct sched_domain [noderef] __rcu *parent
kernel/sched/fair.c:8354:20: 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:8354:20: sparse: expected struct sched_domain *[assigned] sd
kernel/sched/fair.c:8354:20: sparse: got struct sched_domain [noderef] __rcu *parent
kernel/sched/fair.c:8558:9: 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:8558:9: sparse: expected struct sched_domain *[assigned] tmp
kernel/sched/fair.c:8558:9: sparse: got struct sched_domain [noderef] __rcu *parent
kernel/sched/fair.c:8757:39: 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:8757:39: sparse: expected struct task_struct *donor
kernel/sched/fair.c:8757:39: 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:9089:20: sparse: sparse: incorrect type in assignment (different address spaces) @@ expected struct task_struct *p_yielding @@ got struct task_struct [noderef] __rcu *donor @@
kernel/sched/fair.c:9089:20: sparse: expected struct task_struct *p_yielding
kernel/sched/fair.c:9089:20: sparse: got struct task_struct [noderef] __rcu *donor
kernel/sched/fair.c:9110:38: sparse: sparse: incorrect type in initializer (different address spaces) @@ expected struct task_struct *curr @@ got struct task_struct [noderef] __rcu *donor @@
kernel/sched/fair.c:9110:38: sparse: expected struct task_struct *curr
kernel/sched/fair.c:9110:38: sparse: got struct task_struct [noderef] __rcu *donor
kernel/sched/fair.c:10146:40: 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:10146:40: sparse: expected struct sched_domain *child
kernel/sched/fair.c:10146:40: sparse: got struct sched_domain [noderef] __rcu *child
kernel/sched/fair.c:10774:22: sparse: sparse: incompatible types in comparison expression (different address spaces):
kernel/sched/fair.c:10774:22: sparse: struct task_struct [noderef] __rcu *
kernel/sched/fair.c:10774:22: sparse: struct task_struct *
kernel/sched/fair.c:12246:9: 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:12246:9: sparse: expected struct sched_domain *[assigned] sd
kernel/sched/fair.c:12246:9: sparse: got struct sched_domain [noderef] __rcu *parent
kernel/sched/fair.c:11884:44: 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:11884:44: sparse: expected struct sched_domain *sd_parent
kernel/sched/fair.c:11884:44: sparse: got struct sched_domain [noderef] __rcu *parent
kernel/sched/fair.c:12359:9: 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:12359:9: sparse: expected struct sched_domain *[assigned] sd
kernel/sched/fair.c:12359:9: sparse: got struct sched_domain [noderef] __rcu *parent
kernel/sched/fair.c:6688:35: sparse: sparse: marked inline, but without a definition
kernel/sched/fair.c: note: in included file:
kernel/sched/sched.h:2647:9: sparse: sparse: incompatible types in comparison expression (different address spaces):
kernel/sched/sched.h:2647:9: sparse: struct task_struct [noderef] __rcu *
kernel/sched/sched.h:2647:9: sparse: struct task_struct *
kernel/sched/sched.h:2314:26: sparse: sparse: incompatible types in comparison expression (different address spaces):
kernel/sched/sched.h:2314:26: sparse: struct task_struct [noderef] __rcu *
kernel/sched/sched.h:2314:26: sparse: struct task_struct *
kernel/sched/sched.h:2303:25: sparse: sparse: incompatible types in comparison expression (different address spaces):
kernel/sched/sched.h:2303:25: sparse: struct task_struct [noderef] __rcu *
kernel/sched/sched.h:2303:25: sparse: struct task_struct *
kernel/sched/sched.h:2314:26: sparse: sparse: incompatible types in comparison expression (different address spaces):
kernel/sched/sched.h:2314:26: sparse: struct task_struct [noderef] __rcu *
kernel/sched/sched.h:2314:26: sparse: struct task_struct *
kernel/sched/sched.h:2314:26: sparse: sparse: incompatible types in comparison expression (different address spaces):
kernel/sched/sched.h:2314:26: sparse: struct task_struct [noderef] __rcu *
kernel/sched/sched.h:2314:26: sparse: struct task_struct *
kernel/sched/sched.h:2314:26: sparse: sparse: incompatible types in comparison expression (different address spaces):
kernel/sched/sched.h:2314:26: sparse: struct task_struct [noderef] __rcu *
kernel/sched/sched.h:2314:26: sparse: struct task_struct *
vim +9089 kernel/sched/fair.c
9064
9065 /*
9066 * Validate tasks for yield deboost operation.
9067 * Returns the yielding task on success, NULL on validation failure.
9068 *
9069 * Checks: feature enabled, valid target, same runqueue, target is fair class,
9070 * both on_rq. Called under rq->lock.
9071 *
9072 * Note: p_yielding (rq->donor) is guaranteed to be fair class by the caller
9073 * (yield_to_task_fair is only called when curr->sched_class == p->sched_class).
9074 */
9075 static struct task_struct __maybe_unused *
9076 yield_deboost_validate_tasks(struct rq *rq, struct task_struct *p_target)
9077 {
9078 struct task_struct *p_yielding;
9079
9080 if (!sysctl_sched_vcpu_debooster_enabled)
9081 return NULL;
9082
9083 if (!p_target)
9084 return NULL;
9085
9086 if (yield_deboost_rate_limit(rq))
9087 return NULL;
9088
> 9089 p_yielding = rq->donor;
9090 if (!p_yielding || p_yielding == p_target)
9091 return NULL;
9092
9093 if (p_target->sched_class != &fair_sched_class)
9094 return NULL;
9095
9096 if (task_rq(p_target) != rq)
9097 return NULL;
9098
9099 if (!p_target->se.on_rq || !p_yielding->se.on_rq)
9100 return NULL;
9101
9102 return p_yielding;
9103 }
9104
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
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