diff --git a/[refs] b/[refs]
index ee8b9282e376..95dba240eb65 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 7d0642b93780a7309d2954de6f6126d6ceb526f0
+refs/heads/master: b58aaa4b0b3506c094308342d746f600468c63d9
diff --git a/trunk/include/xen/interface/memory.h b/trunk/include/xen/interface/memory.h
index eac3ce153719..8d4efc1cc64a 100644
--- a/trunk/include/xen/interface/memory.h
+++ b/trunk/include/xen/interface/memory.h
@@ -163,6 +163,9 @@ struct xen_add_to_physmap {
     /* Which domain to change the mapping for. */
     domid_t domid;
 
+    /* Number of pages to go through for gmfn_range */
+    uint16_t    size;
+
     /* Source mapping space. */
 #define XENMAPSPACE_shared_info 0 /* shared info page */
 #define XENMAPSPACE_grant_table 1 /* grant table page */