arch/arm/include/asm/irqflags.h:39:9: sparse: sparse: context imbalance in '__split_huge_page' - different lock contexts for basic block

arch/arm/include/asm/irqflags.h:39:9: sparse: sparse: context imbalance in '__split_huge_page' - different lock contexts for basic block

[kernel test robot]

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CC: kbuild-all(a)lists.01.org
CC: linux-kernel(a)vger.kernel.org
TO: Alex Shi <alex.shi@linux.alibaba.com>
CC: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
CC: Andrew Morton <akpm@linux-foundation.org>
CC: Linux Memory Management List <linux-mm@kvack.org>

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   f01da525b3de8e59b2656b55d40c60462098651f
commit: b6769834aac1d467fa1c71277d15688efcbb4d76 mm/thp: narrow lru locking
date:   5 months ago
:::::: branch date: 8 hours ago
:::::: commit date: 5 months ago
config: arm-randconfig-s032-20210521 (attached as .config)
compiler: arm-linux-gnueabi-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/torvalds/linux.git/commit/?id=b6769834aac1d467fa1c71277d15688efcbb4d76
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout b6769834aac1d467fa1c71277d15688efcbb4d76
        # 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=arm 

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 >>)
   mm/huge_memory.c:1640:20: sparse: sparse: context imbalance in 'madvise_free_huge_pmd' - unexpected unlock
   mm/huge_memory.c:1677:28: sparse: sparse: context imbalance in 'zap_huge_pmd' - unexpected unlock
   mm/huge_memory.c:1787:28: sparse: sparse: context imbalance in 'move_huge_pmd' - unexpected unlock
   mm/huge_memory.c:1891:20: sparse: sparse: context imbalance in 'change_huge_pmd' - unexpected unlock
   mm/huge_memory.c:1901:12: sparse: sparse: context imbalance in '__pmd_trans_huge_lock' - wrong count at exit
   mm/huge_memory.c: note: in included file (through include/linux/irqflags.h, arch/arm/include/asm/bitops.h, include/linux/bitops.h, ...):
>> arch/arm/include/asm/irqflags.h:39:9: sparse: sparse: context imbalance in '__split_huge_page' - different lock contexts for basic block
>> arch/arm/include/asm/irqflags.h:39:9: sparse: sparse: context imbalance in 'split_huge_page_to_list' - different lock contexts for basic block

vim +/__split_huge_page +39 arch/arm/include/asm/irqflags.h

df9ee29270c11d David Howells   2010-10-07  35  
6fb18ac9366b74 Daniel Thompson 2015-06-10  36  #define arch_local_irq_enable arch_local_irq_enable
df9ee29270c11d David Howells   2010-10-07  37  static inline void arch_local_irq_enable(void)
df9ee29270c11d David Howells   2010-10-07  38  {
df9ee29270c11d David Howells   2010-10-07 @39  	asm volatile(
df9ee29270c11d David Howells   2010-10-07  40  		"	cpsie i			@ arch_local_irq_enable"
df9ee29270c11d David Howells   2010-10-07  41  		:
df9ee29270c11d David Howells   2010-10-07  42  		:
df9ee29270c11d David Howells   2010-10-07  43  		: "memory", "cc");
df9ee29270c11d David Howells   2010-10-07  44  }
df9ee29270c11d David Howells   2010-10-07  45  

:::::: The code at line 39 was first introduced by commit
:::::: df9ee29270c11dba7d0fe0b83ce47a4d8e8d2101 Fix IRQ flag handling naming

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

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

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