commit 066318109fa2f377e5097f115a23f85c53f1a674
author Jan Kiszka <jan.kiszka@siemens.com> Tue Sep 27 15:00:38 2011 +0200
committer Avi Kivity <avi@redhat.com> Sun Oct 02 16:27:14 2011 +0200
tree b616a56b2401473e7ad278baf2c526a493af1420
parent 4b474ba7a1a96aabcf3482eb5b23ad5361a38750

memory: Do not print empty PIO root

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Avi Kivity <avi@redhat.com>

memory.c

diff --git a/memory.c b/memory.c
index eae67be..19f1d36 100644
--- a/memory.c
+++ b/memory.c
@@ -1360,7 +1360,10 @@
         g_free(ml2);
     }
 
-    QTAILQ_INIT(&ml_head);
-    mon_printf(f, "I/O\n");
-    mtree_print_mr(mon_printf, f, address_space_io.root, 0, 0, &ml_head);
+    if (address_space_io.root &&
+        !QTAILQ_EMPTY(&address_space_io.root->subregions)) {
+        QTAILQ_INIT(&ml_head);
+        mon_printf(f, "I/O\n");
+        mtree_print_mr(mon_printf, f, address_space_io.root, 0, 0, &ml_head);
+    }
 }