Received: by 2002:ac0:e350:0:0:0:0:0 with SMTP id g16csp2180492imn; Mon, 1 Aug 2022 14:17:57 -0700 (PDT) X-Google-Smtp-Source: AA6agR40z2vIdLr5a9q48IXlDibhnBeMeja+sWiY9QHqu1gtvBj9CKJNIyA0QxXSN/QCuarOXofm X-Received: by 2002:a65:6c10:0:b0:41b:ab8f:ff71 with SMTP id y16-20020a656c10000000b0041bab8fff71mr12096767pgu.308.1659388677390; Mon, 01 Aug 2022 14:17:57 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1659388677; cv=none; d=google.com; s=arc-20160816; b=iAtup200ofNftOfNi6zO3EylMI5/JsFPwkA3JypV5yoCO7oMbCZIqW/tNVg4Ok5OGy DPayWvMlQPNxJOmuVOe2HjwI/DJhQ0Nk9PRhliteGX1mWb5tzicV8bJBnktyKGG+lc7K etBtJfzDtOVhnEnZNYIoD0e+gQUO0uMdbwxEy5xOdeXPIjk7Q4G9DvyDdUF7aoLtRs44 Z2whoB3PKWGtDNV2wM2CcF/sDXbbftcMcLnWOkYWf4K8GlsFmhq5yZGDsXK/mNBa34b8 xB8lenVwogst03gKB+Rxf7RAutm0hUbGLJr2D012DPpbaCT9tP0gbdVr712Bwb75vRq2 itJw== 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 :references:in-reply-to:message-id:subject:cc:to:from:date; bh=qVbTd2yLgE/x65aZMDLdPMxKwBMT3h+SMWdpHk55btQ=; b=iZt9oAWj5Rq/hnk4Tk1Ch1o+6HlJuBqHyFuocf+xq1UwpH+3tXCRDPFVH+GR3IWYv3 TR8X5OgQak4QJrNIQbc1f+ZfSzbXhDUkoskB5+flGJQlplRrpnqhqks1uRwvYq9fN13K F3EHFgpIh6igVsf1uJm9pKT8Ak6cL+n7AWwyKT0dip6ICQZZWygvgFdcJAM9+JTg3j4i buuHlnUk0subk7OEpMY6opMYJngLzzGWnu+puFF0lOHYGKsiwISprP1SM7z21UjPUoOD pNwsRnFFOsqLrikVbz1L6Hupk/H0iieCfScuwW40CIvDeBH50e6Fb9gIOXcVfH2BnnbD O/wA== 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 Return-Path: Received: from out1.vger.email (out1.vger.email. [2620:137:e000::1:20]) by mx.google.com with ESMTP id lk11-20020a17090b33cb00b001f4f689d4c3si5918420pjb.147.2022.08.01.14.17.42; Mon, 01 Aug 2022 14:17:57 -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 S234597AbiHAVIO (ORCPT + 99 others); Mon, 1 Aug 2022 17:08:14 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38214 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234419AbiHAVIM (ORCPT ); Mon, 1 Aug 2022 17:08:12 -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 7AAB2186E2; Mon, 1 Aug 2022 14:08:11 -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 3A16CB8171E; Mon, 1 Aug 2022 21:08:10 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id EBD2FC433C1; Mon, 1 Aug 2022 21:08:07 +0000 (UTC) Date: Mon, 1 Aug 2022 17:08:06 -0400 From: Steven Rostedt To: David Laight Cc: "linux-kernel@vger.kernel.org" , Ingo Molnar , Andrew Morton , Peter Zijlstra , Thomas Gleixner , Masami Hiramatsu , "stable@vger.kernel.org" Subject: Re: [for-next][PATCH 21/21] tracing: Use a struct alignof to determine trace event field alignment Message-ID: <20220801170806.061e1268@gandalf.local.home> In-Reply-To: References: <20220731190329.641602282@goodmis.org> <20220731190435.611455708@goodmis.org> X-Mailer: Claws Mail 3.17.8 (GTK+ 2.24.33; x86_64-pc-linux-gnu) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-Spam-Status: No, score=-6.7 required=5.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,RCVD_IN_DNSWL_HI,SPF_HELO_NONE,SPF_PASS 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 On Mon, 1 Aug 2022 07:46:22 +0000 David Laight wrote: > > Define a macro as: > > > > ALIGN_STRUCTFIELD(type) ((int)(offsetof(struct {char a; type b;}, b))) > > > > which gives the actual alignment of types in a structure. > > The simpler: > __alignof__(struct {type b;}) > also works. I'll have to try that out. For now, as the previous version made it through all my tests, I may be pushing it, but change it to this for simplicity if that also works and passes all my test. Thanks, -- Steve