1 files changed, 8 insertions, 0 deletions

diff --git a/fs/aio.c b/fs/aio.c
index b74c567383bc..6af921940622 100644
--- a/fs/aio.c
+++ b/fs/aio.c
@@ -996,6 +996,14 @@ put_rq:
         /* everything turned out well, dispose of the aiocb. */
         ret = __aio_put_req(ctx, iocb);
 
+        /*
+         * We have to order our ring_info tail store above and test
+         * of the wait list below outside the wait lock.  This is
+         * like in wake_up_bit() where clearing a bit has to be
+         * ordered with the unlocked test.
+         */
+        smp_mb();
+
         if (waitqueue_active(&ctx->wait))
                 wake_up(&ctx->wait);