[PATCH 1/6] memory: Do not increase refcount on global system_memory region

[Philippe Mathieu-Daudé]

system_memory is statically allocated in memory_map_init()
(softmmu/physmem.c) and is never destroyed. No need to
increment its refcount.

Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
---
 softmmu/memory.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/softmmu/memory.c b/softmmu/memory.c
index bfedaf9c4df..185f978c925 100644
--- a/softmmu/memory.c
+++ b/softmmu/memory.c
@@ -24,7 +24,7 @@
 #include "qemu/qemu-print.h"
 #include "qom/object.h"
 #include "trace.h"
-
+#include "exec/address-spaces.h"
 #include "exec/memory-internal.h"
 #include "exec/ram_addr.h"
 #include "sysemu/kvm.h"
@@ -2923,7 +2923,9 @@ void address_space_remove_listeners(AddressSpace *as)
 
 void address_space_init(AddressSpace *as, MemoryRegion *root, const char *name)
 {
-    memory_region_ref(root);
+    if (root != get_system_memory()) {
+        memory_region_ref(root);
+    }
     as->root = root;
     as->current_map = NULL;
     as->ioeventfd_nb = 0;
-- 
2.31.1