diff --git a/mm/memory.c b/mm/memory.c
index 8b8f0d2..e7066e7 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -2355,10 +2355,12 @@
 	BUG_ON(is_cow_mapping(vma->vm_flags));
 
 	pfn = vma->vm_ops->nopfn(vma, address & PAGE_MASK);
-	if (pfn == NOPFN_OOM)
+	if (unlikely(pfn == NOPFN_OOM))
 		return VM_FAULT_OOM;
-	if (pfn == NOPFN_SIGBUS)
+	else if (unlikely(pfn == NOPFN_SIGBUS))
 		return VM_FAULT_SIGBUS;
+	else if (unlikely(pfn == NOPFN_REFAULT))
+		return VM_FAULT_MINOR;
 
 	page_table = pte_offset_map_lock(mm, pmd, address, &ptl);