1 files changed, 18 insertions, 0 deletions

diff --git a/include/linux/userfaultfd_k.h b/include/linux/userfaultfd_k.h
index 2521542f6c07..a40be5d0661b 100644
--- a/include/linux/userfaultfd_k.h
+++ b/include/linux/userfaultfd_k.h
@@ -66,6 +66,12 @@ extern void userfaultfd_remove(struct vm_area_struct *vma,
                                unsigned long start,
                                unsigned long end);
 
+extern int userfaultfd_unmap_prep(struct vm_area_struct *vma,
+                                  unsigned long start, unsigned long end,
+                                  struct list_head *uf);
+extern void userfaultfd_unmap_complete(struct mm_struct *mm,
+                                       struct list_head *uf);
+
 #else /* CONFIG_USERFAULTFD */
 
 /* mm helpers */
@@ -118,6 +124,18 @@ static inline void userfaultfd_remove(struct vm_area_struct *vma,
                                       unsigned long end)
 {
 }
+
+static inline int userfaultfd_unmap_prep(struct vm_area_struct *vma,
+                                         unsigned long start, unsigned long end,
+                                         struct list_head *uf)
+{
+        return 0;
+}
+
+static inline void userfaultfd_unmap_complete(struct mm_struct *mm,
+                                              struct list_head *uf)
+{
+}
 #endif /* CONFIG_USERFAULTFD */
 
 #endif /* _LINUX_USERFAULTFD_K_H */