[Qemu-devel] [PATCH memory v4 06/10] memory: MemoryRegion: factor out memory region re-adder

[Peter Crosthwaite]

memory_region_set_address is mostly just a function that deletes and
re-adds a memory region. Factor this generic functionality out into a
re-usable function. This prepares support for further QOMification
of MemoryRegion.

Signed-off-by: Peter Crosthwaite <address@hidden>
---

 memory.c | 30 +++++++++++++++++++-----------
 1 file changed, 19 insertions(+), 11 deletions(-)

diff --git a/memory.c b/memory.c
index f9b9745..7135299 100644
--- a/memory.c
+++ b/memory.c
@@ -828,6 +828,23 @@ static void 
memory_region_destructor_rom_device(MemoryRegion *mr)
     qemu_ram_free(mr->ram_addr & TARGET_PAGE_MASK);
 }
 
+static void do_memory_region_add_subregion_common(MemoryRegion *subregion);
+
+static void memory_region_readd_subregion(MemoryRegion *mr)
+{
+    MemoryRegion *parent = mr->parent;
+
+    if (parent) {
+        memory_region_transaction_begin();
+        memory_region_ref(mr);
+        memory_region_del_subregion(parent, mr);
+        mr->parent = parent;
+        do_memory_region_add_subregion_common(mr);
+        memory_region_unref(mr);
+        memory_region_transaction_commit();
+    }
+}
+
 void memory_region_init(MemoryRegion *mr,
                         Object *owner,
                         const char *name,
@@ -1506,19 +1523,10 @@ void memory_region_set_enabled(MemoryRegion *mr, bool 
enabled)
 
 void memory_region_set_address(MemoryRegion *mr, hwaddr addr)
 {
-    MemoryRegion *parent = mr->parent;
-
-    if (addr == mr->addr || !parent) {
+    if (addr != mr->addr) {
         mr->addr = addr;
-        return;
+        memory_region_readd_subregion(mr);
     }
-
-    memory_region_transaction_begin();
-    memory_region_ref(mr);
-    memory_region_del_subregion(parent, mr);
-    memory_region_add_subregion_common(parent, addr, mr);
-    memory_region_unref(mr);
-    memory_region_transaction_commit();
 }
 
 void memory_region_set_alias_offset(MemoryRegion *mr, hwaddr offset)
-- 
2.0.0