mm/memory.c:1462:9: sparse: sparse: context imbalance in 'insert_page_into_pte_locked' - different lock contexts for basic block

mm/memory.c:1462:9: sparse: sparse: context imbalance in 'insert_page_into_pte_locked' - 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: Arjun Roy <arjunroy@google.com>
CC: Eric Dumazet <edumazet@google.com>
CC: Soheil Hassas Yeganeh <soheil@google.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:   61556703b610a104de324e4f061dc6cf7b218b46
commit: 8efd6f5b1732c4ac88b4bb6908d481d95804fa1c mm/memory.c: refactor insert_page to prepare for batched-lock insert
date:   10 months ago
:::::: branch date: 2 days ago
:::::: commit date: 10 months ago
config: parisc-randconfig-s031-20210206 (attached as .config)
compiler: hppa64-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: v0.6.3-215-g0fb77bb6-dirty
        # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=8efd6f5b1732c4ac88b4bb6908d481d95804fa1c
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout 8efd6f5b1732c4ac88b4bb6908d481d95804fa1c
        # 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__' ARCH=parisc 

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/memory.c: note: in included file (through include/linux/export.h, include/linux/linkage.h, include/linux/kernel.h, ...):
   ./include/generated/autoksyms.h:5:16: sparse: sparse: no whitespace before object-like macro body
   ./include/generated/autoksyms.h:6:16: sparse: sparse: no whitespace before object-like macro body
   ./include/generated/autoksyms.h:6:9: sparse: sparse: preprocessor token __KSYM_ redefined
   ./include/generated/autoksyms.h:5:9: sparse: this was the original definition
   ./include/generated/autoksyms.h:7:16: sparse: sparse: no whitespace before object-like macro body
   ./include/generated/autoksyms.h:7:9: sparse: sparse: preprocessor token __KSYM_ redefined
   ./include/generated/autoksyms.h:5:9: sparse: this was the original definition
   ./include/generated/autoksyms.h:8:16: sparse: sparse: no whitespace before object-like macro body
   ./include/generated/autoksyms.h:8:9: sparse: sparse: preprocessor token __KSYM_ redefined
   ./include/generated/autoksyms.h:5:9: sparse: this was the original definition
   ./include/generated/autoksyms.h:9:16: sparse: sparse: no whitespace before object-like macro body
   ./include/generated/autoksyms.h:9:9: sparse: sparse: preprocessor token __KSYM_ redefined
   ./include/generated/autoksyms.h:5:9: sparse: this was the original definition
   mm/memory.c:810:9: sparse: sparse: context imbalance in 'copy_pte_range' - different lock contexts for basic block
   mm/memory.c: note: in included file (through arch/parisc/include/asm/io.h, include/linux/io.h, include/linux/irq.h, ...):
   arch/parisc/include/asm/pgtable.h:525:26: sparse: sparse: context imbalance in 'zap_pte_range' - different lock contexts for basic block
   mm/memory.c:1442:16: sparse: sparse: context imbalance in '__get_locked_pte' - different lock contexts for basic block
>> mm/memory.c:1462:9: sparse: sparse: context imbalance in 'insert_page_into_pte_locked' - different lock contexts for basic block
   mm/memory.c:1491:9: sparse: sparse: context imbalance in 'insert_page' - different lock contexts for basic block
   mm/memory.c:1665:9: sparse: sparse: context imbalance in 'insert_pfn' - different lock contexts for basic block
   mm/memory.c:1884:17: sparse: sparse: context imbalance in 'remap_pte_range' - different lock contexts for basic block
   mm/memory.c:2114:17: sparse: sparse: context imbalance in 'apply_to_pte_range' - unexpected unlock
   mm/memory.c:2598:17: sparse: sparse: context imbalance in 'wp_page_copy' - different lock contexts for basic block
   mm/memory.c:2708:17: sparse: sparse: context imbalance in 'wp_pfn_shared' - unexpected unlock
   mm/memory.c:2771:19: sparse: sparse: context imbalance in 'do_wp_page' - different lock contexts for basic block
   mm/memory.c:3276:9: sparse: sparse: context imbalance in 'do_anonymous_page' - different lock contexts for basic block
   mm/memory.c:3357:19: sparse: sparse: context imbalance in 'pte_alloc_one_map' - different lock contexts for basic block
   mm/memory.c:3541:9: sparse: sparse: context imbalance in 'alloc_set_pte' - different lock contexts for basic block
   mm/memory.c:3586:17: sparse: sparse: context imbalance in 'finish_fault' - unexpected unlock
   mm/memory.c:3695:9: sparse: sparse: context imbalance in 'do_fault_around' - unexpected unlock
   mm/memory.c: note: in included file (through arch/parisc/include/asm/pgtable.h, arch/parisc/include/asm/io.h, include/linux/io.h, ...):
   include/asm-generic/pgtable.h:641:9: sparse: sparse: context imbalance in 'do_numa_page' - different lock contexts for basic block
   mm/memory.c:4124:9: sparse: sparse: context imbalance in 'handle_pte_fault' - different lock contexts for basic block
   mm/memory.c:4355:12: sparse: sparse: context imbalance in '__follow_pte_pmd' - different lock contexts for basic block
   mm/memory.c:4441:16: sparse: sparse: context imbalance in 'follow_pte_pmd' - different lock contexts for basic block

vim +/insert_page_into_pte_locked +1462 mm/memory.c

8efd6f5b1732c4 Arjun Roy 2020-04-10  1452  
8efd6f5b1732c4 Arjun Roy 2020-04-10  1453  static int insert_page_into_pte_locked(struct mm_struct *mm, pte_t *pte,
8efd6f5b1732c4 Arjun Roy 2020-04-10  1454  			unsigned long addr, struct page *page, pgprot_t prot)
8efd6f5b1732c4 Arjun Roy 2020-04-10  1455  {
8efd6f5b1732c4 Arjun Roy 2020-04-10  1456  	if (!pte_none(*pte))
8efd6f5b1732c4 Arjun Roy 2020-04-10  1457  		return -EBUSY;
8efd6f5b1732c4 Arjun Roy 2020-04-10  1458  	/* Ok, finally just insert the thing.. */
8efd6f5b1732c4 Arjun Roy 2020-04-10  1459  	get_page(page);
8efd6f5b1732c4 Arjun Roy 2020-04-10  1460  	inc_mm_counter_fast(mm, mm_counter_file(page));
8efd6f5b1732c4 Arjun Roy 2020-04-10  1461  	page_add_file_rmap(page, false);
8efd6f5b1732c4 Arjun Roy 2020-04-10 @1462  	set_pte_at(mm, addr, pte, mk_pte(page, prot));
8efd6f5b1732c4 Arjun Roy 2020-04-10  1463  	return 0;
8efd6f5b1732c4 Arjun Roy 2020-04-10  1464  }
8efd6f5b1732c4 Arjun Roy 2020-04-10  1465  

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

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