From patchwork Sun Jul 31 19:03:30 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Steven Rostedt X-Patchwork-Id: 12933199 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 08C29C3F6B0 for ; Sun, 31 Jul 2022 19:04:38 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237697AbiGaTEg (ORCPT ); Sun, 31 Jul 2022 15:04:36 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49174 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230114AbiGaTEf (ORCPT ); Sun, 31 Jul 2022 15:04:35 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 33143EE0E; Sun, 31 Jul 2022 12:04:34 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id A44A461031; Sun, 31 Jul 2022 19:04:33 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 0F59BC433D7; Sun, 31 Jul 2022 19:04:33 +0000 (UTC) Received: from rostedt by gandalf.local.home with local (Exim 4.96) (envelope-from ) id 1oIEEq-007G2B-0I; Sun, 31 Jul 2022 15:04:32 -0400 Message-ID: <20220731190431.934571546@goodmis.org> User-Agent: quilt/0.66 Date: Sun, 31 Jul 2022 15:03:30 -0400 From: Steven Rostedt To: linux-kernel@vger.kernel.org Cc: Ingo Molnar , Andrew Morton , linux-usb@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-mediatek@lists.infradead.org, Greg Kroah-Hartman , Chunfeng Yun Subject: [for-next][PATCH 01/21] USB: mtu3: tracing: Use the new __vstring() helper References: <20220731190329.641602282@goodmis.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org From: "Steven Rostedt (Google)" Instead of open coding a __dynamic_array() with a fixed length (which defeats the purpose of the dynamic array in the first place). Use the new __vstring() helper that will use a va_list and only write enough of the string into the ring buffer that is needed. Link: https://lkml.kernel.org/r/20220719112719.17e796c6@gandalf.local.home Cc: Ingo Molnar Cc: Andrew Morton Cc: linux-usb@vger.kernel.org Cc: linux-arm-kernel@lists.infradead.org Cc: linux-mediatek@lists.infradead.org Acked-by: Greg Kroah-Hartman Tested-by: Chunfeng Yun Signed-off-by: Steven Rostedt (Google) --- drivers/usb/mtu3/mtu3_trace.h | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-) diff --git a/drivers/usb/mtu3/mtu3_trace.h b/drivers/usb/mtu3/mtu3_trace.h index 1b897636daf2..a98fa012b729 100644 --- a/drivers/usb/mtu3/mtu3_trace.h +++ b/drivers/usb/mtu3/mtu3_trace.h @@ -18,18 +18,16 @@ #include "mtu3.h" -#define MTU3_MSG_MAX 256 - TRACE_EVENT(mtu3_log, TP_PROTO(struct device *dev, struct va_format *vaf), TP_ARGS(dev, vaf), TP_STRUCT__entry( __string(name, dev_name(dev)) - __dynamic_array(char, msg, MTU3_MSG_MAX) + __vstring(msg, vaf->fmt, vaf->va) ), TP_fast_assign( __assign_str(name, dev_name(dev)); - vsnprintf(__get_str(msg), MTU3_MSG_MAX, vaf->fmt, *vaf->va); + __assign_vstr(msg, vaf->fmt, vaf->va); ), TP_printk("%s: %s", __get_str(name), __get_str(msg)) );