migration: Make downtime_bytes atomic

Signed-off-by: Juan Quintela <quintela@redhat.com>
Reviewed-by: Peter Xu <peterx@redhat.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/migration/ram.c b/migration/ram.c
index 0b4693215e..b1722b6071 100644
--- a/migration/ram.c
+++ b/migration/ram.c
@@ -467,7 +467,7 @@ void ram_transferred_add(uint64_t bytes)
     } else if (migration_in_postcopy()) {
         stat64_add(&ram_counters.postcopy_bytes, bytes);
     } else {
-        ram_counters.downtime_bytes += bytes;
+        stat64_add(&ram_counters.downtime_bytes, bytes);
     }
     stat64_add(&ram_counters.transferred, bytes);
 }