arch/arm64/include/asm/cpufeature.h:419:16: sparse: sparse: context imbalance in 'split_huge_page_to_list' - different lock contexts for basic block

[kernel test robot <lkp@intel.com>]

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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:   d72cd4ad4174cfd2257c426ad51e4f53bcfde9c9
commit: b6769834aac1d467fa1c71277d15688efcbb4d76 mm/thp: narrow lru locking
date:   4 months ago
:::::: branch date: 4 hours ago
:::::: commit date: 4 months ago
config: arm64-randconfig-s032-20210429 (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/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=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 >>)
   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:2510:29: sparse: sparse: context imbalance in '__split_huge_page' - unexpected unlock
   mm/huge_memory.c: note: in included file (through arch/arm64/include/asm/ptrace.h, arch/arm64/include/asm/irqflags.h, include/linux/irqflags.h, ...):
>> arch/arm64/include/asm/cpufeature.h:419:16: sparse: sparse: context imbalance in 'split_huge_page_to_list' - different lock contexts for basic block

vim +/split_huge_page_to_list +419 arch/arm64/include/asm/cpufeature.h

3be1a5c4f75989 Ard Biesheuvel   2014-03-04  416  
1db5cdeccd8133 Mark Rutland     2020-02-21  417  static __always_inline bool system_capabilities_finalized(void)
930da09f5e50dd Andre Przywara   2014-11-14  418  {
1db5cdeccd8133 Mark Rutland     2020-02-21 @419  	return static_branch_likely(&arm64_const_caps_ready);
a4023f68273943 Suzuki K Poulose 2016-11-08  420  }
a4023f68273943 Suzuki K Poulose 2016-11-08  421  

:::::: The code at line 419 was first introduced by commit
:::::: 1db5cdeccd813330aaab19b3fccab15e1d07fe12 arm64: cpufeature: add cpus_have_final_cap()

:::::: TO: Mark Rutland <mark.rutland@arm.com>
:::::: CC: Catalin Marinas <catalin.marinas@arm.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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