linux-kernel - RE: [PATCH 3/4] sched/rt: Split root_domain->rto

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Message-ID: <PH0PR11MB56746CA201023FEE6D47B244E049A@PH0PR11MB5674.namprd11.prod.outlook.com>
Date: Wed, 9 Jul 2025 08:56:42 +0000
From: "Li, Philip" <philip.li@...el.com>
To: "Deng, Pan" <pan.deng@...el.com>, lkp <lkp@...el.com>,
	"peterz@...radead.org" <peterz@...radead.org>, "mingo@...nel.org"
	<mingo@...nel.org>
CC: "oe-kbuild-all@...ts.linux.dev" <oe-kbuild-all@...ts.linux.dev>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, "Li, Tianyou"
	<tianyou.li@...el.com>, "tim.c.chen@...ux.intel.com"
	<tim.c.chen@...ux.intel.com>, "Chen, Yu C" <yu.c.chen@...el.com>
Subject: RE: [PATCH 3/4] sched/rt: Split root_domain->rto_count to
 per-NUMA-node counters

> > comparison expression (different address spaces):
> >    kernel/sched/sched.h:2276:25: sparse:    struct task_struct [noderef] __rcu *
> >    kernel/sched/sched.h:2276:25: sparse:    struct task_struct *
> >    kernel/sched/sched.h:2276:25: sparse: sparse: incompatible types in
> > comparison expression (different address spaces):
> >    kernel/sched/sched.h:2276:25: sparse:    struct task_struct [noderef] __rcu *
> >    kernel/sched/sched.h:2276:25: sparse:    struct task_struct *
> >    kernel/sched/sched.h:2287:26: sparse: sparse: incompatible types in
> > comparison expression (different address spaces):
> >    kernel/sched/sched.h:2287:26: sparse:    struct task_struct [noderef] __rcu *
> >    kernel/sched/sched.h:2287:26: sparse:    struct task_struct *
> >    kernel/sched/build_policy.c: note: in included file:
> >    kernel/sched/rt.c:2413:45: sparse: sparse: dereference of noderef expression
> >    kernel/sched/build_policy.c: note: in included file:
> > >> kernel/sched/sched.h:2627:35: sparse: sparse: incorrect type in initializer
> This warning is not about the change we made, @lkp, could you please check it?

Sorry for this false report, it should not be related to your changes. We will follow
up to figure out what is wrong during the bisections. Sorry for wasting your time.