diff --git a/mm/memory.c b/mm/memory.c
index 4fa2c30..188722e 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -1285,6 +1285,7 @@
 	unsigned long next;
 
 	BUG_ON(addr >= end);
+	vm_write_begin(vma);
 	tlb_start_vma(tlb, vma);
 	pgd = pgd_offset(vma->vm_mm, addr);
 	do {
@@ -1294,6 +1295,7 @@
 		next = zap_pud_range(tlb, vma, pgd, addr, next, details);
 	} while (pgd++, addr = next, addr != end);
 	tlb_end_vma(tlb, vma);
+	vm_write_end(vma);
 }