diff --git a/mm/nommu.c b/mm/nommu.c
index 6bb7042..51455ef 100644
--- a/mm/nommu.c
+++ b/mm/nommu.c
@@ -807,7 +807,7 @@
 	struct vm_area_struct *vma;
 
 	/* check the cache first */
-	vma = mm->mmap_cache;
+	vma = ACCESS_ONCE(mm->mmap_cache);
 	if (vma && vma->vm_start <= addr && vma->vm_end > addr)
 		return vma;