1 files changed, 17 insertions, 0 deletions

diff --git a/include/linux/userfaultfd_k.h b/include/linux/userfaultfd_k.h
index 79002bca1f43..7f318a46044b 100644
--- a/include/linux/userfaultfd_k.h
+++ b/include/linux/userfaultfd_k.h
@@ -55,6 +55,12 @@ static inline bool userfaultfd_armed(struct vm_area_struct *vma)
 extern int dup_userfaultfd(struct vm_area_struct *, struct list_head *);
 extern void dup_userfaultfd_complete(struct list_head *);
 
+extern void mremap_userfaultfd_prep(struct vm_area_struct *,
+                                    struct vm_userfaultfd_ctx *);
+extern void mremap_userfaultfd_complete(struct vm_userfaultfd_ctx,
+                                        unsigned long from, unsigned long to,
+                                        unsigned long len);
+
 #else /* CONFIG_USERFAULTFD */
 
 /* mm helpers */
@@ -89,6 +95,17 @@ static inline void dup_userfaultfd_complete(struct list_head *l)
 {
 }
 
+static inline void mremap_userfaultfd_prep(struct vm_area_struct *vma,
+                                           struct vm_userfaultfd_ctx *ctx)
+{
+}
+
+static inline void mremap_userfaultfd_complete(struct vm_userfaultfd_ctx ctx,
+                                               unsigned long from,
+                                               unsigned long to,
+                                               unsigned long len)
+{
+}
 #endif /* CONFIG_USERFAULTFD */
 
 #endif /* _LINUX_USERFAULTFD_K_H */