tree: git://git.cmpxchg.org/linux-mmotm.git master
head: a2d887dee78e23dc092ff14ae2ad22592437a328
commit: ee010684ca66feef309e267f9a47a8cb9b6eb2e3 [181/397] mm: don't split THP page when syscall is called
reproduce:
# apt-get install sparse
git checkout ee010684ca66feef309e267f9a47a8cb9b6eb2e3
make ARCH=x86_64 allmodconfig
make C=1 CF=-D__CHECK_ENDIAN__
sparse warnings: (new ones prefixed by >>)
>> arch/x86/include/asm/paravirt.h:534:17: sparse: context imbalance in 'madvise_free_huge_pmd' - unexpected unlock
mm/huge_memory.c:1436:40: sparse: context imbalance in 'zap_huge_pmd' - unexpected unlock
mm/huge_memory.c:1467:28: sparse: context imbalance in 'mincore_huge_pmd' - unexpected unlock
mm/huge_memory.c:1521:28: sparse: context imbalance in 'move_huge_pmd' - unexpected unlock
mm/huge_memory.c:1566:28: sparse: context imbalance in 'change_huge_pmd' - unexpected unlock
mm/huge_memory.c:1579:5: sparse: context imbalance in '__pmd_trans_huge_lock' - different lock contexts for basic block
mm/huge_memory.c:1606:7: sparse: context imbalance in 'page_check_address_pmd' - different lock contexts for basic block
mm/huge_memory.c:1680:17: sparse: context imbalance in '__split_huge_page_splitting' - unexpected unlock
arch/x86/include/asm/paravirt.h:545:17: sparse: context imbalance in '__split_huge_page_map' - unexpected unlock
vim +/madvise_free_huge_pmd +534 arch/x86/include/asm/paravirt.h
4eed80cd include/asm-x86/paravirt.h Jeremy Fitzhardinge 2008-01-30 518 pte_t *ptep, pte_t pte)
4eed80cd include/asm-x86/paravirt.h Jeremy Fitzhardinge 2008-01-30 519 {
4eed80cd include/asm-x86/paravirt.h Jeremy Fitzhardinge 2008-01-30 520 if (sizeof(pteval_t) > sizeof(long))
4eed80cd include/asm-x86/paravirt.h Jeremy Fitzhardinge 2008-01-30 521 /* 5 arg words */
4eed80cd include/asm-x86/paravirt.h Jeremy Fitzhardinge 2008-01-30 522 pv_mmu_ops.set_pte_at(mm, addr, ptep, pte);
4eed80cd include/asm-x86/paravirt.h Jeremy Fitzhardinge 2008-01-30 523 else
4eed80cd include/asm-x86/paravirt.h Jeremy Fitzhardinge 2008-01-30 524 PVOP_VCALL4(pv_mmu_ops.set_pte_at, mm, addr, ptep, pte.pte);
4eed80cd include/asm-x86/paravirt.h Jeremy Fitzhardinge 2008-01-30 525 }
4eed80cd include/asm-x86/paravirt.h Jeremy Fitzhardinge 2008-01-30 526
331127f7 arch/x86/include/asm/paravirt.h Andrea Arcangeli 2011-01-13 527 static inline void set_pmd_at(struct mm_struct *mm, unsigned long addr,
331127f7 arch/x86/include/asm/paravirt.h Andrea Arcangeli 2011-01-13 528 pmd_t *pmdp, pmd_t pmd)
331127f7 arch/x86/include/asm/paravirt.h Andrea Arcangeli 2011-01-13 529 {
331127f7 arch/x86/include/asm/paravirt.h Andrea Arcangeli 2011-01-13 530 if (sizeof(pmdval_t) > sizeof(long))
331127f7 arch/x86/include/asm/paravirt.h Andrea Arcangeli 2011-01-13 531 /* 5 arg words */
331127f7 arch/x86/include/asm/paravirt.h Andrea Arcangeli 2011-01-13 532 pv_mmu_ops.set_pmd_at(mm, addr, pmdp, pmd);
331127f7 arch/x86/include/asm/paravirt.h Andrea Arcangeli 2011-01-13 533 else
cacf061c arch/x86/include/asm/paravirt.h Andrea Arcangeli 2011-01-25 @534 PVOP_VCALL4(pv_mmu_ops.set_pmd_at, mm, addr, pmdp,
cacf061c arch/x86/include/asm/paravirt.h Andrea Arcangeli 2011-01-25 535 native_pmd_val(pmd));
331127f7 arch/x86/include/asm/paravirt.h Andrea Arcangeli 2011-01-13 536 }
331127f7 arch/x86/include/asm/paravirt.h Andrea Arcangeli 2011-01-13 537
60b3f626 include/asm-x86/paravirt.h Jeremy Fitzhardinge 2008-01-30 538 static inline void set_pmd(pmd_t *pmdp, pmd_t pmd)
60b3f626 include/asm-x86/paravirt.h Jeremy Fitzhardinge 2008-01-30 539 {
60b3f626 include/asm-x86/paravirt.h Jeremy Fitzhardinge 2008-01-30 540 pmdval_t val = native_pmd_val(pmd);
60b3f626 include/asm-x86/paravirt.h Jeremy Fitzhardinge 2008-01-30 541
60b3f626 include/asm-x86/paravirt.h Jeremy Fitzhardinge 2008-01-30 542 if (sizeof(pmdval_t) > sizeof(long))
:::::: The code at line 534 was first introduced by commit
:::::: cacf061c5e42a040200463afccd9178ace680322 thp: fix PARAVIRT x86 32bit noPAE
:::::: TO: Andrea Arcangeli <aarcange@xxxxxxxxxx>
:::::: CC: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
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