diff options
Diffstat (limited to 'mm/memory.c')
| -rw-r--r-- | mm/memory.c | 13 |
1 files changed, 7 insertions, 6 deletions
diff --git a/mm/memory.c b/mm/memory.c index 0b5a93a49f27..d05c6b10e926 100644 --- a/mm/memory.c +++ b/mm/memory.c @@ -550,6 +550,7 @@ void free_pgtables(struct mmu_gather *tlb, struct vm_area_struct *vma, int __pte_alloc(struct mm_struct *mm, struct vm_area_struct *vma, pmd_t *pmd, unsigned long address) { + spinlock_t *ptl; pgtable_t new = pte_alloc_one(mm, address); int wait_split_huge_page; if (!new) @@ -570,7 +571,7 @@ int __pte_alloc(struct mm_struct *mm, struct vm_area_struct *vma, */ smp_wmb(); /* Could be smp_wmb__xxx(before|after)_spin_lock */ - spin_lock(&mm->page_table_lock); + ptl = pmd_lock(mm, pmd); wait_split_huge_page = 0; if (likely(pmd_none(*pmd))) { /* Has another populated it ? */ atomic_long_inc(&mm->nr_ptes); @@ -578,7 +579,7 @@ int __pte_alloc(struct mm_struct *mm, struct vm_area_struct *vma, new = NULL; } else if (unlikely(pmd_trans_splitting(*pmd))) wait_split_huge_page = 1; - spin_unlock(&mm->page_table_lock); + spin_unlock(ptl); if (new) pte_free(mm, new); if (wait_split_huge_page) @@ -1516,20 +1517,20 @@ struct page *follow_page_mask(struct vm_area_struct *vma, split_huge_page_pmd(vma, address, pmd); goto split_fallthrough; } - spin_lock(&mm->page_table_lock); + ptl = pmd_lock(mm, pmd); if (likely(pmd_trans_huge(*pmd))) { if (unlikely(pmd_trans_splitting(*pmd))) { - spin_unlock(&mm->page_table_lock); + spin_unlock(ptl); wait_split_huge_page(vma->anon_vma, pmd); } else { page = follow_trans_huge_pmd(vma, address, pmd, flags); - spin_unlock(&mm->page_table_lock); + spin_unlock(ptl); *page_mask = HPAGE_PMD_NR - 1; goto out; } } else - spin_unlock(&mm->page_table_lock); + spin_unlock(ptl); /* fall through */ } split_fallthrough: |