[tip:sched/core 26/29] include/linux/spinlock_api_smp.h:160:9: sparse: sparse: context imbalance in 'sched_core_update_cookie' - wrong count at exit

[tip:sched/core 26/29] include/linux/spinlock_api_smp.h:160:9: sparse: sparse: context imbalance in 'sched_core_update_cookie' - wrong count at exit

[kernel test robot]

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CC: kbuild-all(a)lists.01.org
CC: linux-kernel(a)vger.kernel.org
CC: x86(a)kernel.org
TO: Peter Zijlstra <peterz@infradead.org>

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git sched/core
head:   9f26990074931bbf797373e53104216059b300b1
commit: 6e33cad0af49336952e5541464bd02f5b5fd433e [26/29] sched: Trivial core scheduling cookie management
:::::: branch date: 29 hours ago
:::::: commit date: 29 hours ago
config: arm64-randconfig-s031-20210513 (attached as .config)
compiler: aarch64-linux-gcc (GCC) 9.3.0
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: v0.6.3-341-g8af24329-dirty
        # https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git/commit/?id=6e33cad0af49336952e5541464bd02f5b5fd433e
        git remote add tip https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git
        git fetch --no-tags tip sched/core
        git checkout 6e33cad0af49336952e5541464bd02f5b5fd433e
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' W=1 ARCH=arm64 

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


sparse warnings: (new ones prefixed by >>)
   kernel/sched/core_sched.c: note: in included file (through include/linux/spinlock.h, include/linux/wait.h, include/linux/pid.h, ...):
>> include/linux/spinlock_api_smp.h:160:9: sparse: sparse: context imbalance in 'sched_core_update_cookie' - wrong count at exit

vim +/sched_core_update_cookie +160 include/linux/spinlock_api_smp.h

69d0ee7377eef8 Heiko Carstens  2009-08-31  154  
9c1721aa4994f6 Thomas Gleixner 2009-12-03  155  static inline void __raw_spin_unlock_irqrestore(raw_spinlock_t *lock,
69d0ee7377eef8 Heiko Carstens  2009-08-31  156  					    unsigned long flags)
69d0ee7377eef8 Heiko Carstens  2009-08-31  157  {
5facae4f3549b5 Qian Cai        2019-09-19  158  	spin_release(&lock->dep_map, _RET_IP_);
9828ea9d75c38f Thomas Gleixner 2009-12-03  159  	do_raw_spin_unlock(lock);
69d0ee7377eef8 Heiko Carstens  2009-08-31 @160  	local_irq_restore(flags);
69d0ee7377eef8 Heiko Carstens  2009-08-31  161  	preempt_enable();
69d0ee7377eef8 Heiko Carstens  2009-08-31  162  }
69d0ee7377eef8 Heiko Carstens  2009-08-31  163  

:::::: The code at line 160 was first introduced by commit
:::::: 69d0ee7377eef808e34ba5542b554ec97244b871 locking: Move spinlock function bodies to header file

:::::: TO: Heiko Carstens <heiko.carstens@de.ibm.com>
:::::: CC: Ingo Molnar <mingo@elte.hu>

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

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