Index: gevent-21.1.2/deps/libev/ev_iouring.c
===================================================================
--- gevent-21.1.2.orig/deps/libev/ev_iouring.c
+++ gevent-21.1.2/deps/libev/ev_iouring.c
@@ -286,6 +286,9 @@ iouring_sqe_get (EV_P)
   return EV_SQES + (tail & EV_SQ_VAR (ring_mask));
 }
 
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wreturn-type"
+
 inline_size
 struct io_uring_sqe *
 iouring_sqe_submit (EV_P_ struct io_uring_sqe *sqe)
@@ -330,6 +333,8 @@ iouring_internal_destroy (EV_P)
     }
 }
 
+#pragma GCC diagnostic pop
+
 ecb_cold
 static int
 iouring_internal_init (EV_P)