diff options
Diffstat (limited to 'mm/msync.c')
| -rw-r--r-- | mm/msync.c | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/mm/msync.c b/mm/msync.c index f292e0d27a51..2a2b31de8957 100644 --- a/mm/msync.c +++ b/mm/msync.c @@ -26,10 +26,14 @@ static int filemap_sync_pte(pte_t *ptep, struct vm_area_struct *vma, pte_t pte = *ptep; if (pte_present(pte) && pte_dirty(pte)) { - struct page *page = pte_page(pte); - if (VALID_PAGE(page) && !PageReserved(page) && ptep_test_and_clear_dirty(ptep)) { - flush_tlb_page(vma, address); - set_page_dirty(page); + struct page *page; + unsigned long pfn = pte_pfn(pte); + if (pfn_valid(pfn)) { + page = pfn_to_page(pfn); + if (!PageReserved(page) && ptep_test_and_clear_dirty(ptep)) { + flush_tlb_page(vma, address); + set_page_dirty(page); + } } } return 0; |