1 files changed, 7 insertions, 0 deletions

diff --git a/include/linux/mm.h b/include/linux/mm.h
index 8e433bbc6e7e..22165cb18906 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -199,6 +199,7 @@ struct vm_operations_struct {
         void (*open)(struct vm_area_struct * area);
         void (*close)(struct vm_area_struct * area);
         struct page * (*nopage)(struct vm_area_struct * area, unsigned long address, int *type);
+        unsigned long (*nopfn)(struct vm_area_struct * area, unsigned long address);
         int (*populate)(struct vm_area_struct * area, unsigned long address, unsigned long len, pgprot_t prot, unsigned long pgoff, int nonblock);
 
         /* notification that a previously read-only page is about to become
@@ -594,6 +595,12 @@ static inline int page_mapped(struct page *page)
 #define NOPAGE_OOM      ((struct page *) (-1))
 
 /*
+ * Error return values for the *_nopfn functions
+ */
+#define NOPFN_SIGBUS    ((unsigned long) -1)
+#define NOPFN_OOM       ((unsigned long) -2)
+
+/*
  * Different kinds of faults, as returned by handle_mm_fault().
  * Used to decide whether a process gets delivered SIGBUS or
  * just gets major/minor fault counters bumped up.