[Qemu-devel] [PATCH memory v3 4/9] memory: Coreify subregion add functionality

[Peter Crosthwaite <peter.crosthwaite@xilinx.com>]

Split off the core looping code that actually adds subregions into
it's own fn. This prepares support for Memory Region qomification
where setting the MR address or parent via QOM will back onto this more
minimal function.

Signed-off-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com>
---

 memory.c | 18 ++++++++++++------
 1 file changed, 12 insertions(+), 6 deletions(-)

diff --git a/memory.c b/memory.c
index 1352881..dd0a576 100644
--- a/memory.c
+++ b/memory.c
@@ -1410,18 +1410,15 @@ void memory_region_del_eventfd(MemoryRegion *mr,
     memory_region_transaction_commit();
 }
 
-static void memory_region_add_subregion_common(MemoryRegion *mr,
-                                               hwaddr offset,
-                                               MemoryRegion *subregion)
+static void do_memory_region_add_subregion_common(MemoryRegion *subregion)
 {
+    hwaddr offset = subregion->addr;
+    MemoryRegion *mr = subregion->parent;
     MemoryRegion *other;
 
     memory_region_transaction_begin();
 
-    assert(!subregion->parent);
     memory_region_ref(subregion);
-    subregion->parent = mr;
-    subregion->addr = offset;
     QTAILQ_FOREACH(other, &mr->subregions, subregions_link) {
         if (subregion->may_overlap || other->may_overlap) {
             continue;
@@ -1455,6 +1452,15 @@ done:
     memory_region_transaction_commit();
 }
 
+static void memory_region_add_subregion_common(MemoryRegion *mr,
+                                               hwaddr offset,
+                                               MemoryRegion *subregion)
+{
+    assert(!subregion->parent);
+    subregion->parent = mr;
+    subregion->addr = offset;
+    do_memory_region_add_subregion_common(subregion);
+}
 
 void memory_region_add_subregion(MemoryRegion *mr,
                                  hwaddr offset,
-- 
2.0.0