linux-kernel - Re: [PATCH 2/2] cgroup-v2/freezer: Print information about unfreezable process

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Message-ID: <202512241804.JAJl5a7k-lkp@intel.com>
Date: Wed, 24 Dec 2025 19:03:07 +0800
From: kernel test robot <lkp@...el.com>
To: Pavel Tikhomirov <ptikhomirov@...tuozzo.com>, Tejun Heo <tj@...nel.org>
Cc: oe-kbuild-all@...ts.linux.dev, Johannes Weiner <hannes@...xchg.org>,
	Michal Koutný <mkoutny@...e.com>,
	cgroups@...r.kernel.org, linux-kernel@...r.kernel.org,
	Pavel Tikhomirov <ptikhomirov@...tuozzo.com>
Subject: Re: [PATCH 2/2] cgroup-v2/freezer: Print information about
 unfreezable process

Hi Pavel,

kernel test robot noticed the following build warnings:

[auto build test WARNING on tj-cgroup/for-next]
[also build test WARNING on linus/master v6.19-rc2 next-20251219]
[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/Pavel-Tikhomirov/cgroup-v2-freezer-allow-freezing-with-kthreads/20251223-182826
base:   https://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup.git for-next
patch link:    https://lore.kernel.org/r/20251223102124.738818-4-ptikhomirov%40virtuozzo.com
patch subject: [PATCH 2/2] cgroup-v2/freezer: Print information about unfreezable process
config: arm64-randconfig-r134-20251224 (https://download.01.org/0day-ci/archive/20251224/202512241804.JAJl5a7k-lkp@intel.com/config)
compiler: clang version 22.0.0git (https://github.com/llvm/llvm-project 4ef602d446057dabf5f61fb221669ecbeda49279)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251224/202512241804.JAJl5a7k-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/202512241804.JAJl5a7k-lkp@intel.com/

sparse warnings: (new ones prefixed by >>)
   kernel/cgroup/freezer.c:144:35: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected struct spinlock [usertype] *lock @@     got struct spinlock [noderef] __rcu * @@
   kernel/cgroup/freezer.c:144:35: sparse:     expected struct spinlock [usertype] *lock
   kernel/cgroup/freezer.c:144:35: sparse:     got struct spinlock [noderef] __rcu *
   kernel/cgroup/freezer.c:147:37: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected struct spinlock [usertype] *lock @@     got struct spinlock [noderef] __rcu * @@
   kernel/cgroup/freezer.c:147:37: sparse:     expected struct spinlock [usertype] *lock
   kernel/cgroup/freezer.c:147:37: sparse:     got struct spinlock [noderef] __rcu *
>> kernel/cgroup/freezer.c:416:5: sparse: sparse: symbol 'sysctl_freeze_timeout_us' was not declared. Should it be static?
   kernel/cgroup/freezer.c: note: in included file (through include/linux/rcuwait.h, include/linux/percpu-rwsem.h, include/linux/fs/super_types.h, ...):
   include/linux/sched/signal.h:756:37: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected struct spinlock [usertype] *lock @@     got struct spinlock [noderef] __rcu * @@
   include/linux/sched/signal.h:756:37: sparse:     expected struct spinlock [usertype] *lock
   include/linux/sched/signal.h:756:37: sparse:     got struct spinlock [noderef] __rcu *

vim +/sysctl_freeze_timeout_us +416 kernel/cgroup/freezer.c

   414	
   415	#define DEFAULT_FREEZE_RATELIMIT (30 * HZ)
 > 416	int sysctl_freeze_timeout_us;
   417	

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki