diff --git a/mm/memory.c b/mm/memory.c
index 6105f47..f7b6c98 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -1340,7 +1340,6 @@
  * @start_addr: virtual address at which to start unmapping
  * @end_addr: virtual address at which to end unmapping
  * @nr_accounted: Place number of unmapped pages in vm-accountable vma's here
- * @details: details of nonlinear truncation or shared cache invalidation
  *
  * Unmap all pages in the vma list.
  *
@@ -1355,15 +1354,13 @@
  */
 void unmap_vmas(struct mmu_gather *tlb,
 		struct vm_area_struct *vma, unsigned long start_addr,
-		unsigned long end_addr, unsigned long *nr_accounted,
-		struct zap_details *details)
+		unsigned long end_addr, unsigned long *nr_accounted)
 {
 	struct mm_struct *mm = vma->vm_mm;
 
 	mmu_notifier_invalidate_range_start(mm, start_addr, end_addr);
 	for ( ; vma && vma->vm_start < end_addr; vma = vma->vm_next)
-		unmap_single_vma(tlb, vma, start_addr, end_addr, nr_accounted,
-				 details);
+		unmap_single_vma(tlb, vma, start_addr, end_addr, nr_accounted, NULL);
 	mmu_notifier_invalidate_range_end(mm, start_addr, end_addr);
 }
 
@@ -1376,19 +1373,22 @@
  *
  * Caller must protect the VMA list
  */
-void zap_page_range(struct vm_area_struct *vma, unsigned long address,
+void zap_page_range(struct vm_area_struct *vma, unsigned long start,
 		unsigned long size, struct zap_details *details)
 {
 	struct mm_struct *mm = vma->vm_mm;
 	struct mmu_gather tlb;
-	unsigned long end = address + size;
+	unsigned long end = start + size;
 	unsigned long nr_accounted = 0;
 
 	lru_add_drain();
 	tlb_gather_mmu(&tlb, mm, 0);
 	update_hiwater_rss(mm);
-	unmap_vmas(&tlb, vma, address, end, &nr_accounted, details);
-	tlb_finish_mmu(&tlb, address, end);
+	mmu_notifier_invalidate_range_start(mm, start, end);
+	for ( ; vma && vma->vm_start < end; vma = vma->vm_next)
+		unmap_single_vma(&tlb, vma, start, end, &nr_accounted, details);
+	mmu_notifier_invalidate_range_end(mm, start, end);
+	tlb_finish_mmu(&tlb, start, end);
 }
 
 /**