/*
* Initialize pte walk starting at the already pinned page where we
- * are sure that there is a pte.
+ * are sure that there is a pte, as it was pinned under the same
+ * mmap_sem write op.
*/
pte = get_locked_pte(vma->vm_mm, start, &ptl);
- end = min(end, pmd_addr_end(start, end));
+ /* Make sure we do not cross the page table boundary */
+ end = pgd_addr_end(start, end);
+ end = pud_addr_end(start, end);
+ end = pmd_addr_end(start, end);
/* The page next to the pinned page is the first we will try to get */
start += PAGE_SIZE;