[XEN] Quieten down tracing when fail (quite expectedly) to map INVALID_MFN.

Signed-off-by: Keir Fraser <keir@xensource.com>

diff --git a/xen/arch/x86/mm.c b/xen/arch/x86/mm.c
index 88d031fac4fe8d4e9595dfbb086df2fcf458db63..fd0745773e51836ab72ada83fdefb445ec89be0a 100644 (file)
--- a/xen/arch/x86/mm.c
+++ b/xen/arch/x86/mm.c
@@ -572,8 +572,9 @@ get_page_from_l1e(
 
         if ( !iomem_access_permitted(d, mfn, mfn) )
         {
-            MEM_LOG("Non-privileged (%u) attempt to map I/O space %08lx", 
-                    d->domain_id, mfn);
+            if ( mfn != INVALID_MFN )
+                MEM_LOG("Non-privileged (%u) attempt to map I/O space %08lx", 
+                        d->domain_id, mfn);
             return 0;
         }