1 files changed, 5 insertions, 0 deletions
diff --git a/mm/internal.h b/mm/internal.h
index 07b67361a40a..6ee580d69ddd 100644
--- a/mm/internal.h
+++ b/mm/internal.h
@@ -169,6 +169,11 @@ static inline unsigned long page_order(struct page *page)
 	return page_private(page);
 }
 
+static inline bool is_cow_mapping(vm_flags_t flags)
+{
+	return (flags & (VM_SHARED | VM_MAYWRITE)) == VM_MAYWRITE;
+}
+
 /* mm/util.c */
 void __vma_link_list(struct mm_struct *mm, struct vm_area_struct *vma,
 		struct vm_area_struct *prev, struct rb_node *rb_parent);