linux-kernel - [paulmck-rcu:dev.2021.11.10a 81/96] kernel/rcu/tasks.h:181:25: sparse: sparse: incorrect type in argument 1 (different modifiers)

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Date:   Thu, 18 Nov 2021 09:41:40 +0800
From:   kernel test robot <lkp@...el.com>
To:     "Paul E. McKenney" <paulmck@...nel.org>
Cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org
Subject: [paulmck-rcu:dev.2021.11.10a 81/96] kernel/rcu/tasks.h:181:25:
 sparse: sparse: incorrect type in argument 1 (different modifiers)

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu.git dev.2021.11.10a
head:   cfbd3769397911e7f1561fa57b4490b1e4fed9de
commit: a3ecbdd6d841a025ebe87b79c7538b4dc44edc94 [81/96] rcu-tasks: Use spin_lock_rcu_node() and friends
config: arm-randconfig-s032-20211115 (attached as .config)
compiler: arm-linux-gnueabi-gcc (GCC) 11.2.0
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # apt-get install sparse
        # sparse version: v0.6.4-dirty
        # https://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu.git/commit/?id=a3ecbdd6d841a025ebe87b79c7538b4dc44edc94
        git remote add paulmck-rcu https://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu.git
        git fetch --no-tags paulmck-rcu dev.2021.11.10a
        git checkout a3ecbdd6d841a025ebe87b79c7538b4dc44edc94
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=arm 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@...el.com>


sparse warnings: (new ones prefixed by >>)
   kernel/rcu/update.c: note: in included file:
>> kernel/rcu/tasks.h:181:25: sparse: sparse: incorrect type in argument 1 (different modifiers) @@     expected struct raw_spinlock [usertype] *lock @@     got struct raw_spinlock [noderef] * @@
   kernel/rcu/tasks.h:181:25: sparse:     expected struct raw_spinlock [usertype] *lock
   kernel/rcu/tasks.h:181:25: sparse:     got struct raw_spinlock [noderef] *

vim +181 kernel/rcu/tasks.h

   165	
   166	// Initialize per-CPU callback lists for the specified flavor of
   167	// Tasks RCU.
   168	static void cblist_init_generic(struct rcu_tasks *rtp)
   169	{
   170		int cpu;
   171		unsigned long flags;
   172	
   173		raw_spin_lock_irqsave(&rtp->cbs_gbl_lock, flags);
   174		rtp->percpu_enqueue_shift = ilog2(nr_cpu_ids);
   175		for_each_possible_cpu(cpu) {
   176			struct rcu_tasks_percpu *rtpcp = per_cpu_ptr(rtp->rtpcpu, cpu);
   177	
   178			pr_info("%s initializing CPU %d rcu_tasks_percpu structure for %s\n", __func__, cpu, rtp->name);
   179			WARN_ON_ONCE(!rtpcp);
   180			if (cpu)
 > 181				raw_spin_lock_init(&rtpcp->lock);
   182			raw_spin_lock_irqsave_rcu_node(rtpcp, flags);
   183			if (rcu_segcblist_empty(&rtpcp->cblist))
   184				rcu_segcblist_init(&rtpcp->cblist);
   185			raw_spin_unlock_irqrestore_rcu_node(rtpcp, flags);
   186		}
   187		raw_spin_unlock_irqrestore(&rtp->cbs_gbl_lock, flags);
   188	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org

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