diff options
Diffstat (limited to 'mm/memory.c')
| -rw-r--r-- | mm/memory.c | 23 |
1 files changed, 13 insertions, 10 deletions
diff --git a/mm/memory.c b/mm/memory.c index ca8cac11bd2c..f82b359b2745 100644 --- a/mm/memory.c +++ b/mm/memory.c @@ -1639,6 +1639,7 @@ static int do_wp_page(struct mm_struct *mm, struct vm_area_struct *vma, struct page *old_page, *new_page; pte_t entry; int reuse = 0, ret = 0; + int page_mkwrite = 0; struct page *dirty_page = NULL; old_page = vm_normal_page(vma, address, orig_pte); @@ -1687,6 +1688,8 @@ static int do_wp_page(struct mm_struct *mm, struct vm_area_struct *vma, page_cache_release(old_page); if (!pte_same(*page_table, orig_pte)) goto unlock; + + page_mkwrite = 1; } dirty_page = old_page; get_page(dirty_page); @@ -1774,7 +1777,7 @@ unlock: * do_no_page is protected similarly. */ wait_on_page_locked(dirty_page); - set_page_dirty_balance(dirty_page); + set_page_dirty_balance(dirty_page, page_mkwrite); put_page(dirty_page); } return ret; @@ -2307,13 +2310,14 @@ oom: * do not need to flush old virtual caches or the TLB. * * We enter with non-exclusive mmap_sem (to exclude vma changes, - * but allow concurrent faults), and pte mapped but not yet locked. + * but allow concurrent faults), and pte neither mapped nor locked. * We return with mmap_sem still held, but pte unmapped and unlocked. */ static int __do_fault(struct mm_struct *mm, struct vm_area_struct *vma, - unsigned long address, pte_t *page_table, pmd_t *pmd, + unsigned long address, pmd_t *pmd, pgoff_t pgoff, unsigned int flags, pte_t orig_pte) { + pte_t *page_table; spinlock_t *ptl; struct page *page; pte_t entry; @@ -2321,13 +2325,13 @@ static int __do_fault(struct mm_struct *mm, struct vm_area_struct *vma, struct page *dirty_page = NULL; struct vm_fault vmf; int ret; + int page_mkwrite = 0; vmf.virtual_address = (void __user *)(address & PAGE_MASK); vmf.pgoff = pgoff; vmf.flags = flags; vmf.page = NULL; - pte_unmap(page_table); BUG_ON(vma->vm_flags & VM_PFNMAP); if (likely(vma->vm_ops->fault)) { @@ -2398,6 +2402,7 @@ static int __do_fault(struct mm_struct *mm, struct vm_area_struct *vma, anon = 1; /* no anon but release vmf.page */ goto out; } + page_mkwrite = 1; } } @@ -2453,7 +2458,7 @@ out_unlocked: if (anon) page_cache_release(vmf.page); else if (dirty_page) { - set_page_dirty_balance(dirty_page); + set_page_dirty_balance(dirty_page, page_mkwrite); put_page(dirty_page); } @@ -2468,8 +2473,8 @@ static int do_linear_fault(struct mm_struct *mm, struct vm_area_struct *vma, - vma->vm_start) >> PAGE_CACHE_SHIFT) + vma->vm_pgoff; unsigned int flags = (write_access ? FAULT_FLAG_WRITE : 0); - return __do_fault(mm, vma, address, page_table, pmd, pgoff, - flags, orig_pte); + pte_unmap(page_table); + return __do_fault(mm, vma, address, pmd, pgoff, flags, orig_pte); } @@ -2552,9 +2557,7 @@ static int do_nonlinear_fault(struct mm_struct *mm, struct vm_area_struct *vma, } pgoff = pte_to_pgoff(orig_pte); - - return __do_fault(mm, vma, address, page_table, pmd, pgoff, - flags, orig_pte); + return __do_fault(mm, vma, address, pmd, pgoff, flags, orig_pte); } /* |