mem_event: move mem_event_domain out of struct domain

An upcoming change may increase the size of mem_event_domain. The result
is a build failure because struct domain gets larger than a page.
Allocate the room for the three mem_event_domain members at runtime.

v2:
 - remove mem_ prefix from members of new struct

Signed-off-by: Olaf Hering <olaf@aepfle.de>
Committed-by: Keir Fraser <keir@xen.org>

1 files changed, 12 insertions, 6 deletions

diff --git a/xen/include/xen/sched.h b/xen/include/xen/sched.h
index e12293cafc..39ed2c061b 100644
--- a/xen/include/xen/sched.h
+++ b/xen/include/xen/sched.h
@@ -194,6 +194,16 @@ struct mem_event_domain
     int xen_port;
 };
 
+struct mem_event_per_domain
+{
+    /* Memory sharing support */
+    struct mem_event_domain share;
+    /* Memory paging support */
+    struct mem_event_domain paging;
+    /* Memory access support */
+    struct mem_event_domain access;
+};
+
 struct domain
 {
     domid_t          domain_id;
@@ -318,12 +328,8 @@ struct domain
     /* Non-migratable and non-restoreable? */
     bool_t disable_migrate;
 
-    /* Memory sharing support */
-    struct mem_event_domain mem_share;
-    /* Memory paging support */
-    struct mem_event_domain mem_paging;
-    /* Memory access support */
-    struct mem_event_domain mem_access;
+    /* Various mem_events */
+    struct mem_event_per_domain *mem_event;
 
     /* Currently computed from union of all vcpu cpu-affinity masks. */
     nodemask_t node_affinity;