diff options
| -rw-r--r-- | mm/huge_memory.c | 14 |
1 files changed, 4 insertions, 10 deletions
diff --git a/mm/huge_memory.c b/mm/huge_memory.c index bdd6a8dd5797..4aa31c77cbab 100644 --- a/mm/huge_memory.c +++ b/mm/huge_memory.c @@ -1235,17 +1235,11 @@ struct page *follow_trans_huge_pmd(struct vm_area_struct *vma, VM_BUG_ON_PAGE(!PageHead(page), page); if (flags & FOLL_TOUCH) { pmd_t _pmd; - /* - * We should set the dirty bit only for FOLL_WRITE but - * for now the dirty bit in the pmd is meaningless. - * And if the dirty bit will become meaningful and - * we'll only set it with FOLL_WRITE, an atomic - * set_bit will be required on the pmd to set the - * young bit, instead of the current set_pmd_at. - */ - _pmd = pmd_mkyoung(pmd_mkdirty(*pmd)); + _pmd = pmd_mkyoung(*pmd); + if (flags & FOLL_WRITE) + _pmd = pmd_mkdirty(_pmd); if (pmdp_set_access_flags(vma, addr & HPAGE_PMD_MASK, - pmd, _pmd, 1)) + pmd, _pmd, flags & FOLL_WRITE)) update_mmu_cache_pmd(vma, addr, pmd); } if ((flags & FOLL_POPULATE) && (vma->vm_flags & VM_LOCKED)) { |