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-rw-r--r--synapse/storage/background_updates.py14
1 files changed, 5 insertions, 9 deletions
diff --git a/synapse/storage/background_updates.py b/synapse/storage/background_updates.py
index f43463df53..90a1f9e8b1 100644
--- a/synapse/storage/background_updates.py
+++ b/synapse/storage/background_updates.py
@@ -18,8 +18,6 @@ from typing import Optional
 
 from canonicaljson import json
 
-from twisted.internet import defer
-
 from synapse.metrics.background_process_metrics import run_as_background_process
 
 from . import engines
@@ -308,9 +306,8 @@ class BackgroundUpdater(object):
             update_name (str): Name of update
         """
 
-        @defer.inlineCallbacks
-        def noop_update(progress, batch_size):
-            yield self._end_background_update(update_name)
+        async def noop_update(progress, batch_size):
+            await self._end_background_update(update_name)
             return 1
 
         self.register_background_update_handler(update_name, noop_update)
@@ -409,12 +406,11 @@ class BackgroundUpdater(object):
         else:
             runner = create_index_sqlite
 
-        @defer.inlineCallbacks
-        def updater(progress, batch_size):
+        async def updater(progress, batch_size):
             if runner is not None:
                 logger.info("Adding index %s to %s", index_name, table)
-                yield self.db_pool.runWithConnection(runner)
-            yield self._end_background_update(update_name)
+                await self.db_pool.runWithConnection(runner)
+            await self._end_background_update(update_name)
             return 1
 
         self.register_background_update_handler(update_name, updater)