From patchwork Thu Jul 13 15:45:10 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Steven Rostedt X-Patchwork-Id: 12013 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:a59:a6b2:0:b0:3e4:2afc:c1 with SMTP id c18csp1919478vqm; Thu, 13 Jul 2023 08:58:34 -0700 (PDT) X-Google-Smtp-Source: APBJJlGls4ktZ1ylwlPeu5J5YhtgEPEG0QdjRDk9zpHVHSF6puSAg5eeZX1wloEqHk6X4YCw3b92 X-Received: by 2002:a17:903:32c7:b0:1b8:b4e5:15c2 with SMTP id i7-20020a17090332c700b001b8b4e515c2mr1543624plr.22.1689263914217; Thu, 13 Jul 2023 08:58:34 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1689263914; cv=none; d=google.com; s=arc-20160816; b=xJj2PHd6n/jaMecDBzVYhrkAcIbH6d7YlMNG6VD5La2wM2X9KEAOYjq4xELocTD07b T/yYdv6jR/nrhwFndTFEcBSCR7xLU6bA4wFyRX3fb43JcovXEmEogwe9pj9ef3MbvW76 W33J33UwpdPUpvTfu5rhnMUkTEHvDdqVwH8QeYf6VookrbkgwR/jIvRnLktjXksRE8ru Kh8uVKryaI29kuxFd3QjP6S326Rk55+K43rYFcZbIH5IHeDXJD4lULGGanwRG3oSyxR9 jA42uXEk1RmQcUx4To+CuIndrPeHPbqmkfbH/wk7qTQbH+n+oMc/IDrEavCTqN10TEzp Z/YA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:content-transfer-encoding:mime-version :message-id:subject:cc:to:from:date; bh=oT9yxjvQrRPPOn3xlkLhgkV0TcMqVLRYFcFamWSGvxw=; fh=YnVyIEcFvDD9bB9RjPWxIWHfBLuTviS9p0IMKoOVQMY=; b=MwM7O6D5RKK82J2RBn1y/B+X69sKnNici7/2wx54NnIPqpDihc/pzpgV8NG6NwQ1wV afbZvQ1mLfruLve/vklr9pc0vTePP20ZnSHoWVKuBEo77u+nWOG/hSvbLHER6tb8kK8S uIn0FOqRECpNBTa5gIxFRmS3ScWXChDBHuZp1yuwdh+Uh/TLK8Hla2D1cFAzETXdC8Ut XLgssOgmlrl5pc6Zv9k0I25D2lVwfF5xemWM7TmbImzphEJrWF/UEfQ4uXzeLmPc+hvD TfUsv8AV2+e44PuHkyCfr3cl8nlNt9ympdrTaxKlKlsX+Tdw7zinyyAoQh6OxjhfE1Y9 bpVQ== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: from out1.vger.email (out1.vger.email. [2620:137:e000::1:20]) by mx.google.com with ESMTP id im23-20020a170902bb1700b001b9d2659694si5260812plb.270.2023.07.13.08.58.18; Thu, 13 Jul 2023 08:58:34 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232405AbjGMPpQ (ORCPT + 99 others); Thu, 13 Jul 2023 11:45:16 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47242 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229691AbjGMPpP (ORCPT ); Thu, 13 Jul 2023 11:45:15 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 4B5792680; Thu, 13 Jul 2023 08:45:14 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id D2FC961881; Thu, 13 Jul 2023 15:45:13 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 8F5E4C433C7; Thu, 13 Jul 2023 15:45:12 +0000 (UTC) Date: Thu, 13 Jul 2023 11:45:10 -0400 From: Steven Rostedt To: LKML , Linux Trace Kernel Cc: Masami Hiramatsu , Mark Rutland , Zheng Yejian Subject: [PATCH 0/2] tracing: Clean up how iter is freed Message-ID: <20230713114510.04c452ca@gandalf.local.home> X-Mailer: Claws Mail 3.19.1 (GTK+ 2.24.33; x86_64-pc-linux-gnu) MIME-Version: 1.0 X-Spam-Status: No, score=-4.0 required=5.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,RCVD_IN_DNSWL_MED,SPF_HELO_NONE,SPF_PASS, T_SCC_BODY_TEXT_LINE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1771321598400503011 X-GMAIL-MSGID: 1771321598400503011 The trace iterator is used in various interfaces and needs to be consistent in how it is cleaned up. Add a helper function to clean up its content. But before doing so, I noticed that iter->trace is allocated then the content of tr->current_trace is copied to it. There's no reason for this, so the first patch removes that allocation and just points to the content of tr->current_trace, as tr->current_trace can change, but the content should not. Steven Rostedt (Google) (2): tracing: Remove unnecessary copying of tr->current_trace tracing: Add free_trace_iter_content() helper function ---- kernel/trace/trace.c | 62 +++++++++++++++++++++++++++++++------------------------------- 1 file changed, 31 insertions(+), 31 deletions(-)