From patchwork Sun Jul 24 23:16:50 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Steven Rostedt X-Patchwork-Id: 12927656 X-Patchwork-Delegate: kuba@kernel.org 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 08E5EC43334 for ; Sun, 24 Jul 2022 23:17:01 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230224AbiGXXQ7 (ORCPT ); Sun, 24 Jul 2022 19:16:59 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54994 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229687AbiGXXQ6 (ORCPT ); Sun, 24 Jul 2022 19:16:58 -0400 Received: from ams.source.kernel.org (ams.source.kernel.org [IPv6:2604:1380:4601:e00::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E804BD79; Sun, 24 Jul 2022 16:16:55 -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 ams.source.kernel.org (Postfix) with ESMTPS id 91B75B80DD1; Sun, 24 Jul 2022 23:16:54 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id CA9ABC341C0; Sun, 24 Jul 2022 23:16:51 +0000 (UTC) Date: Sun, 24 Jul 2022 19:16:50 -0400 From: Steven Rostedt To: LKML Cc: Ingo Molnar , Andrew Morton , Marek Lindner , Simon Wunderlich , Antonio Quartulli , Sven Eckelmann , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , b.a.t.m.a.n@lists.open-mesh.org, netdev@vger.kernel.org Subject: [PATCH v2] batman-adv: tracing: Use the new __vstring() helper Message-ID: <20220724191650.236b1355@rorschach.local.home> X-Mailer: Claws Mail 3.17.8 (GTK+ 2.24.33; x86_64-pc-linux-gnu) MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-Delegate: kuba@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. Cc: Marek Lindner Cc: Ingo Molnar Cc: Andrew Morton Cc: Simon Wunderlich Cc: Antonio Quartulli Cc: Sven Eckelmann Cc: "David S. Miller" Cc: Eric Dumazet Cc: Jakub Kicinski Cc: Paolo Abeni Cc: b.a.t.m.a.n@lists.open-mesh.org Cc: netdev@vger.kernel.org Signed-off-by: Steven Rostedt (Google) Acked-by: Sven Eckelmann --- Changes since v1: https://lkml.kernel.org/r/20220705224751.080390002@goodmis.org - Removed no longer used BATADV_MAX_MSG_LEN net/batman-adv/trace.h | 9 ++------- 1 file changed, 2 insertions(+), 7 deletions(-) diff --git a/net/batman-adv/trace.h b/net/batman-adv/trace.h index d673ebdd0426..31c8f922651d 100644 --- a/net/batman-adv/trace.h +++ b/net/batman-adv/trace.h @@ -28,8 +28,6 @@ #endif /* CONFIG_BATMAN_ADV_TRACING */ -#define BATADV_MAX_MSG_LEN 256 - TRACE_EVENT(batadv_dbg, TP_PROTO(struct batadv_priv *bat_priv, @@ -40,16 +38,13 @@ TRACE_EVENT(batadv_dbg, TP_STRUCT__entry( __string(device, bat_priv->soft_iface->name) __string(driver, KBUILD_MODNAME) - __dynamic_array(char, msg, BATADV_MAX_MSG_LEN) + __vstring(msg, vaf->fmt, vaf->va) ), TP_fast_assign( __assign_str(device, bat_priv->soft_iface->name); __assign_str(driver, KBUILD_MODNAME); - WARN_ON_ONCE(vsnprintf(__get_dynamic_array(msg), - BATADV_MAX_MSG_LEN, - vaf->fmt, - *vaf->va) >= BATADV_MAX_MSG_LEN); + __assign_vstr(msg, vaf->fmt, vaf->va); ), TP_printk(