linux-kernel - arch/x86/include/asm/preempt.h:79:9: sparse: sparse: context imbalance in 'xfs_iflush_abort'

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Date:   Sat, 20 Jun 2020 19:28:37 +0800
From:   kernel test robot <lkp@...el.com>
To:     Dave Chinner <dchinner@...hat.com>
Cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org,
        "Darrick J. Wong" <darrick.wong@...cle.com>,
        Christoph Hellwig <hch@....de>,
        Allison Collins <allison.henderson@...cle.com>,
        Brian Foster <bfoster@...hat.com>
Subject: arch/x86/include/asm/preempt.h:79:9: sparse: sparse: context
 imbalance in 'xfs_iflush_abort' - wrong count at exit

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   4333a9b0b67bb4e8bcd91bdd80da80b0ec151162
commit: 4165994ac9672d91134675caa6de3645a9ace6c8 xfs: factor common AIL item deletion code
date:   3 months ago
config: i386-randconfig-s002-20200620 (attached as .config)
compiler: gcc-9 (Debian 9.3.0-13) 9.3.0
reproduce:
        # apt-get install sparse
        # sparse version: v0.6.2-rc1-18-g27caae40-dirty
        git checkout 4165994ac9672d91134675caa6de3645a9ace6c8
        # save the attached .config to linux build tree
        make W=1 C=1 ARCH=i386 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 >>)

>> arch/x86/include/asm/preempt.h:79:9: sparse: sparse: context imbalance in 'xfs_iflush_abort' - wrong count at exit

vim +/xfs_iflush_abort +79 arch/x86/include/asm/preempt.h

c2daa3bed53a81 Peter Zijlstra    2013-08-14  72  
c2daa3bed53a81 Peter Zijlstra    2013-08-14  73  /*
c2daa3bed53a81 Peter Zijlstra    2013-08-14  74   * The various preempt_count add/sub methods
c2daa3bed53a81 Peter Zijlstra    2013-08-14  75   */
c2daa3bed53a81 Peter Zijlstra    2013-08-14  76  
c2daa3bed53a81 Peter Zijlstra    2013-08-14  77  static __always_inline void __preempt_count_add(int val)
c2daa3bed53a81 Peter Zijlstra    2013-08-14  78  {
b3ca1c10d7b32f Christoph Lameter 2014-04-07 @79  	raw_cpu_add_4(__preempt_count, val);
c2daa3bed53a81 Peter Zijlstra    2013-08-14  80  }
c2daa3bed53a81 Peter Zijlstra    2013-08-14  81  

:::::: The code at line 79 was first introduced by commit
:::::: b3ca1c10d7b32fdfdfaf5484eda486323f52d9be percpu: add raw_cpu_ops

:::::: TO: Christoph Lameter <cl@...ux.com>
:::::: CC: Linus Torvalds <torvalds@...ux-foundation.org>

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

Download attachment ".config.gz" of type "application/gzip" (36502 bytes)