diff --git a/include/linux/aio.h b/include/linux/aio.h
index a30ef13..43dc2eb 100644
--- a/include/linux/aio.h
+++ b/include/linux/aio.h
@@ -226,7 +226,8 @@
 		__put_ioctx(kioctx);					\
 } while (0)
 
-#define in_aio() !is_sync_wait(current->io_wait)
+#define in_aio() (unlikely(!is_sync_wait(current->io_wait)))
+
 /* may be used for debugging */
 #define warn_if_async()							\
 do {									\