rmap: remove anon_vma check in page_address_in_vma()

[can-eth-gw-linux.git] / mm / rmap.c

diff --git a/mm/rmap.c b/mm/rmap.c
index 07fc94758799b778e39ac8796216e84d8c2548e0..0feeef860a8f5b5d61081234f40e8e149e2696f5 100644 (file)
--- a/mm/rmap.c
+++ b/mm/rmap.c
@@ -336,14 +336,13 @@ 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.
+ * Caller should check the page is actually part of the vma.
  */
 unsigned long page_address_in_vma(struct page *page, struct vm_area_struct *vma)
 {
-       if (PageAnon(page)) {
-               if (vma->anon_vma != page_anon_vma(page))
-                       return -EFAULT;
-       } else if (page->mapping && !(vma->vm_flags & VM_NONLINEAR)) {
+       if (PageAnon(page))
+               ;
+       else if (page->mapping && !(vma->vm_flags & VM_NONLINEAR)) {
                if (!vma->vm_file ||
                    vma->vm_file->f_mapping != page->mapping)
                        return -EFAULT;