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-rw-r--r--fs/aio.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/fs/aio.c b/fs/aio.c
index b74c567383b..6af92194062 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);