exec: separate current radix tree from the one being built

This same treatment previously done to phys_node_map and phys_sections
is now applied to the dispatch field of AddressSpace.  Topology updates
use as->next_dispatch while accesses use as->dispatch.

Reviewed-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/include/exec/memory.h b/include/exec/memory.h
index 248c89bdb6..ebe0d24182 100644
--- a/include/exec/memory.h
+++ b/include/exec/memory.h
@@ -209,6 +209,7 @@ struct AddressSpace {
     int ioeventfd_nb;
     struct MemoryRegionIoeventfd *ioeventfds;
     struct AddressSpaceDispatch *dispatch;
+    struct AddressSpaceDispatch *next_dispatch;
     MemoryListener dispatch_listener;
 
     QTAILQ_ENTRY(AddressSpace) address_spaces_link;