linux-kernel - include/asm-generic/irqflags.h:47:9: sparse: sparse: context imbalance in 'cm_queue_work_unlock'

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Date:   Thu, 11 Jun 2020 13:57:33 +0800
From:   kernel test robot <lkp@...el.com>
To:     Jason Gunthorpe <jgg@...lanox.com>
Cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org,
        Leon Romanovsky <leonro@...lanox.com>
Subject: include/asm-generic/irqflags.h:47:9: sparse: sparse: context
 imbalance in 'cm_queue_work_unlock' - unexpected unlock

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   b29482fde649c72441d5478a4ea2c52c56d97a5e
commit: e83f195aa45c1ffd73b3a950a887e41c260cf194 RDMA/cm: Pull duplicated code into cm_queue_work_unlock()
date:   4 weeks ago
config: sh-randconfig-s032-20200611 (attached as .config)
compiler: sh4-linux-gcc (GCC) 9.3.0
reproduce:
        # apt-get install sparse
        # sparse version: v0.6.1-250-g42323db3-dirty
        git checkout e83f195aa45c1ffd73b3a950a887e41c260cf194
        # save the attached .config to linux build tree
        make W=1 C=1 ARCH=sh CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__'

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 >>)

   drivers/infiniband/core/cm.c:1297:21: sparse: sparse: cast from restricted __be32
>> include/asm-generic/irqflags.h:47:9: sparse: sparse: context imbalance in 'cm_queue_work_unlock' - unexpected unlock
   drivers/infiniband/core/cm.c:2043:12: sparse: sparse: context imbalance in 'cm_req_handler' - different lock contexts for basic block
   drivers/infiniband/core/cm.c:2422:12: sparse: sparse: context imbalance in 'cm_rep_handler' - different lock contexts for basic block
   drivers/infiniband/core/cm.c:2533:12: sparse: sparse: context imbalance in 'cm_establish_handler' - different lock contexts for basic block
   drivers/infiniband/core/cm.c:2556:12: sparse: sparse: context imbalance in 'cm_rtu_handler' - different lock contexts for basic block
   drivers/infiniband/core/cm.c:2770:12: sparse: sparse: context imbalance in 'cm_dreq_handler' - different lock contexts for basic block
   drivers/infiniband/core/cm.c:2847:12: sparse: sparse: context imbalance in 'cm_drep_handler' - different lock contexts for basic block
   drivers/infiniband/core/cm.c:2995:12: sparse: sparse: context imbalance in 'cm_rej_handler' - wrong count at exit
   drivers/infiniband/core/cm.c:3153:12: sparse: sparse: context imbalance in 'cm_mra_handler' - different lock contexts for basic block
   drivers/infiniband/core/cm.c:3271:12: sparse: sparse: context imbalance in 'cm_lap_handler' - different lock contexts for basic block
   drivers/infiniband/core/cm.c:3360:12: sparse: sparse: context imbalance in 'cm_apr_handler' - different lock contexts for basic block
   drivers/infiniband/core/cm.c:3405:12: sparse: sparse: context imbalance in 'cm_timewait_handler' - different lock contexts for basic block

vim +/cm_queue_work_unlock +47 include/asm-generic/irqflags.h

aafe4dbed0bf6c Arnd Bergmann 2009-05-13  42  
aafe4dbed0bf6c Arnd Bergmann 2009-05-13  43  /* unconditionally enable interrupts */
df9ee29270c11d David Howells 2010-10-07  44  #ifndef arch_local_irq_enable
df9ee29270c11d David Howells 2010-10-07  45  static inline void arch_local_irq_enable(void)
aafe4dbed0bf6c Arnd Bergmann 2009-05-13  46  {
df9ee29270c11d David Howells 2010-10-07 @47  	arch_local_irq_restore(ARCH_IRQ_ENABLED);
aafe4dbed0bf6c Arnd Bergmann 2009-05-13  48  }
aafe4dbed0bf6c Arnd Bergmann 2009-05-13  49  #endif
aafe4dbed0bf6c Arnd Bergmann 2009-05-13  50  

:::::: The code at line 47 was first introduced by commit
:::::: df9ee29270c11dba7d0fe0b83ce47a4d8e8d2101 Fix IRQ flag handling naming

:::::: TO: David Howells <dhowells@...hat.com>
:::::: CC: David Howells <dhowells@...hat.com>

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

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