[peterz-queue:sched/core-sched 29/29] kernel/sched/sched.h:1165:30: sparse: sparse: context imbalance in '__sched_core_update_cookie' - wrong count at exit

[peterz-queue:sched/core-sched 29/29] kernel/sched/sched.h:1165:30: sparse: sparse: context imbalance in '__sched_core_update_cookie' - wrong count at exit

[kernel test robot]

[-- Attachment #1: Type: text/plain, Size: 2422 bytes --]

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

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git sched/core-sched
head:   491d689ecb4f0997949741220d6f468bd3a682a4
commit: 491d689ecb4f0997949741220d6f468bd3a682a4 [29/29] sched: prctl() and cgroup interaction
:::::: branch date: 6 hours ago
:::::: commit date: 6 hours ago
config: i386-randconfig-s001-20210401 (attached as .config)
compiler: gcc-9 (Debian 9.3.0-22) 9.3.0
reproduce:
        # apt-get install sparse
        # sparse version: v0.6.3-279-g6d5d9b42-dirty
        # https://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git/commit/?id=491d689ecb4f0997949741220d6f468bd3a682a4
        git remote add peterz-queue https://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git
        git fetch --no-tags peterz-queue sched/core-sched
        git checkout 491d689ecb4f0997949741220d6f468bd3a682a4
        # save the attached .config to linux build tree
        make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=i386 

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:
>> kernel/sched/sched.h:1165:30: sparse: sparse: context imbalance in '__sched_core_update_cookie' - wrong count at exit

vim +/__sched_core_update_cookie +1165 kernel/sched/sched.h

32e565880fdaf78 Peter Zijlstra 2020-11-17  1164  
cd9b834385acf67 Peter Zijlstra 2021-03-03 @1165  static inline raw_spinlock_t *__rq_lockp(struct rq *rq)
cd9b834385acf67 Peter Zijlstra 2021-03-03  1166  {
cd9b834385acf67 Peter Zijlstra 2021-03-03  1167  	if (rq->core_enabled)
cd9b834385acf67 Peter Zijlstra 2021-03-03  1168  		return &rq->core->__lock;
cd9b834385acf67 Peter Zijlstra 2021-03-03  1169  
cd9b834385acf67 Peter Zijlstra 2021-03-03  1170  	return &rq->__lock;
cd9b834385acf67 Peter Zijlstra 2021-03-03  1171  }
cd9b834385acf67 Peter Zijlstra 2021-03-03  1172  

:::::: The code at line 1165 was first introduced by commit
:::::: cd9b834385acf67c2bb433bcc7341067831b2dc6 sched: Optimize rq_lockp() usage

:::::: TO: Peter Zijlstra <peterz@infradead.org>
:::::: CC: Peter Zijlstra <peterz@infradead.org>

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

[-- Attachment #2: config.gz --]
[-- Type: application/gzip, Size: 41174 bytes --]