xen: update xen_add_to_physmap interface

Update struct xen_add_to_physmap to be in sync with Xen's version of the
structure.
The size field was introduced by:

changeset:   24164:707d27fe03e7
user:        Jean Guyader <jean.guyader@eu.citrix.com>
date:        Fri Nov 18 13:42:08 2011 +0000
summary:     mm: New XENMEM space, XENMAPSPACE_gmfn_range

According to the comment:

"This new field .size is located in the 16 bits padding between .domid
and .space in struct xen_add_to_physmap to stay compatible with older
versions."

Note: this patch should be already in Konrad's tree, it is here just for
convenience.

Changes in v2:

- remove erroneous comment in the commit message.

Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>

diff --git a/include/xen/interface/memory.h b/include/xen/interface/memory.h
index b5c3098298a478f0d1267a99ca5ef31cf8e4963c..b66d04ce6957549a1097c532bc483e5ee6ab38d8 100644 (file)
--- a/include/xen/interface/memory.h
+++ b/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 */