async: make async_synchronize_full() more serializing

turns out that there are real problems with allowing async tasks that are scheduled from async tasks to run after the async_synchronize_full() returns. This patch makes the _full more strict and a complete synchronization. Later I might need to add back a lighter form of synchronization for other uses.. but not right now. Signed-off-by: Arjan van de Ven <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
mrcheets · Jan 8, 2009 · 33b04b9 · 33b04b9
1 parent 85da1fb
commit 33b04b9
Showing 1 changed file with 3 additions and 1 deletion.
diff --git a/kernel/async.c b/kernel/async.c
@@ -206,7 +206,9 @@ EXPORT_SYMBOL_GPL(async_schedule_special);
 
 void async_synchronize_full(void)
 {
-	async_synchronize_cookie(next_cookie);
+	do {
+		async_synchronize_cookie(next_cookie);
+	} while (!list_empty(&async_running) || !list_empty(&async_pending));
 }
 EXPORT_SYMBOL_GPL(async_synchronize_full);