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-rw-r--r--include/linux/userfaultfd_k.h13
1 files changed, 13 insertions, 0 deletions
diff --git a/include/linux/userfaultfd_k.h b/include/linux/userfaultfd_k.h
index 11b92b047a1e..79002bca1f43 100644
--- a/include/linux/userfaultfd_k.h
+++ b/include/linux/userfaultfd_k.h
@@ -52,6 +52,9 @@ static inline bool userfaultfd_armed(struct vm_area_struct *vma)
return vma->vm_flags & (VM_UFFD_MISSING | VM_UFFD_WP);
}
+extern int dup_userfaultfd(struct vm_area_struct *, struct list_head *);
+extern void dup_userfaultfd_complete(struct list_head *);
+
#else /* CONFIG_USERFAULTFD */
/* mm helpers */
@@ -76,6 +79,16 @@ static inline bool userfaultfd_armed(struct vm_area_struct *vma)
return false;
}
+static inline int dup_userfaultfd(struct vm_area_struct *vma,
+ struct list_head *l)
+{
+ return 0;
+}
+
+static inline void dup_userfaultfd_complete(struct list_head *l)
+{
+}
+
#endif /* CONFIG_USERFAULTFD */
#endif /* _LINUX_USERFAULTFD_K_H */
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