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-rw-r--r--mm/rmap.c14
1 files changed, 2 insertions, 12 deletions
diff --git a/mm/rmap.c b/mm/rmap.c
index 2e034a0..6389cda 100644
--- a/mm/rmap.c
+++ b/mm/rmap.c
@@ -226,8 +226,6 @@ vma_address(struct page *page, struct vm_area_struct *vma)
/*
* At what user virtual address is page expected in vma? checking that the
* page matches the vma: currently only used on anon pages, by unuse_vma;
- * and by extraordinary checks on anon pages in VM_UNPAGED vmas, taking
- * care that an mmap of /dev/mem might window free and foreign pages.
*/
unsigned long page_address_in_vma(struct page *page, struct vm_area_struct *vma)
{
@@ -614,7 +612,6 @@ static void try_to_unmap_cluster(unsigned long cursor,
struct page *page;
unsigned long address;
unsigned long end;
- unsigned long pfn;
address = (vma->vm_start + cursor) & CLUSTER_MASK;
end = address + CLUSTER_SIZE;
@@ -643,15 +640,8 @@ static void try_to_unmap_cluster(unsigned long cursor,
for (; address < end; pte++, address += PAGE_SIZE) {
if (!pte_present(*pte))
continue;
-
- pfn = pte_pfn(*pte);
- if (unlikely(!pfn_valid(pfn))) {
- print_bad_pte(vma, *pte, address);
- continue;
- }
-
- page = pfn_to_page(pfn);
- BUG_ON(PageAnon(page));
+ page = vm_normal_page(vma, address, *pte);
+ BUG_ON(!page || PageAnon(page));
if (ptep_clear_flush_young(vma, address, pte))
continue;
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