From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-4.2 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,NICE_REPLY_A,SPF_HELO_NONE, SPF_PASS,USER_AGENT_SANE_1 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 9A4E0C1B0D9 for ; Fri, 11 Dec 2020 08:16:44 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 6E94A23ECD for ; Fri, 11 Dec 2020 08:16:44 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388352AbgLKIP5 (ORCPT ); Fri, 11 Dec 2020 03:15:57 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:43480 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2392021AbgLKIPu (ORCPT ); Fri, 11 Dec 2020 03:15:50 -0500 Received: from mail-ej1-x633.google.com (mail-ej1-x633.google.com [IPv6:2a00:1450:4864:20::633]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A3F7BC0613CF for ; Fri, 11 Dec 2020 00:15:10 -0800 (PST) Received: by mail-ej1-x633.google.com with SMTP id x16so11140055ejj.7 for ; Fri, 11 Dec 2020 00:15:10 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=cc:subject:to:references:from:message-id:date:user-agent :mime-version:in-reply-to:content-language:content-transfer-encoding; bh=V26ahxm2juVDynrStUQ+yooZj2Cf1OFuOoslTzoEyBQ=; b=d2ggdbtGejGBFBGZwwXe4SHZXKhHmxtOSUS4U4wH5Qx/bPP6odIfasliE3MXAc3s0Z dK9EjA4yzQELNqqryjiKoO2zLdSG/vu5qciET7ueKxYEg/rO60zx/upHGR2O3z9DeQI8 JhO+i7zwSbyGKKAPt6Ejjql3HRWJP41Oe7C1xIJ+wifZ2/jnhc3hpyi4C9tVpRI8z+YH mVGUG/36KV2ReG13O7/RFSR1BLhNkWcapX6WombWqhKPT8OyPlNMcQn3yJVc3FgqbZim l8Q7E1PyXZ4wgf1mXqe/88y7bwAw+gHIPyh0XGew8Fbv9c7uYrntj8u81bdxLsxlnfHg erFQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:cc:subject:to:references:from:message-id:date :user-agent:mime-version:in-reply-to:content-language :content-transfer-encoding; bh=V26ahxm2juVDynrStUQ+yooZj2Cf1OFuOoslTzoEyBQ=; b=BqR66eyq5EI6t8f+MhpW2E6ogwAPkYNlFpaHFup8bAzVrwlMo+en6iLlEZd3tKDT1f O5l/PoXHLKZE4cBD8iU9a7TXhuUDe6/FctjWirVy7eSNJXbTrUq9kSwdNAT9USNitSgx 1+whtSSjF41joCofHS7YvwoJ/7NAU48Trxf0Qd+KCqPnaOmzzVn8UXmdXAgthvKNHD8z NJ4i55OcXxvwO3WqJVVDwQYz6pQQSVi2ByXDouVhvsJz3GravTatssTWUL8sBocUK/gF 5lNCMPvUgLJgmeOaYwBDEgMgv24STqpF/+4GkZtcYlc8iaScF9DX+ClmE79bGGr5a6Ev 8X3w== X-Gm-Message-State: AOAM532i+1/VOssRKJv623p45rxHIZbxPeVAZ29S6ljvcJCi1J1SRpNP t/8FDlLKXHLiidKUszsd1qY= X-Google-Smtp-Source: ABdhPJzrELP6wKH0xNSHm/HCBfOyzQOSSEs4YHIJajOY2M1XaWOB82SCYEqUqfFrUxe+5G3I78J/TA== X-Received: by 2002:a17:906:dc1:: with SMTP id p1mr10078613eji.9.1607674507786; Fri, 11 Dec 2020 00:15:07 -0800 (PST) Received: from ?IPv6:2001:a61:25cc:8301:40d9:de28:875c:ad0d? ([2001:a61:25cc:8301:40d9:de28:875c:ad0d]) by smtp.gmail.com with ESMTPSA id m13sm7325532edi.87.2020.12.11.00.15.06 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 11 Dec 2020 00:15:07 -0800 (PST) Cc: mtk.manpages@gmail.com, linux-man@vger.kernel.org, gcc@gcc.gnu.org, cfe-users@lists.llvm.org Subject: Re: RFC v2: Re: cacheflush.2 To: "Alejandro Colomar (man-pages)" , Heinrich Schuchardt , Dave Martin References: <794cf0d1-d528-4b5a-3ce0-b1b5f588dc6d@gmx.de> <20201210181726.GT6882@arm.com> <747d56e0-c102-ab40-add4-530a48a43a4d@gmx.de> From: "Michael Kerrisk (man-pages)" Message-ID: Date: Fri, 11 Dec 2020 09:15:04 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.5.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-man@vger.kernel.org i Alex, On 12/10/20 9:56 PM, Alejandro Colomar (man-pages) wrote: > Hi all, > > v2: > > [ > NOTES > Unless you need the finer grained control that this system > call provides, you probably want to use the GCC built-in > function __builtin___clear_cache(), which provides a more > portable interface: > > void __builtin___clear_cache(void *begin, void *end); > ] This seems a reasonable text to me, but I think it would be helpful to say a little more precisely what kind of portability we are talking about here. Greater ortability across Linux architectures? Greater portability across platforms supported by GCC (including non-Linux) platforms? Something else? Thanks, Michael -- Michael Kerrisk Linux man-pages maintainer; http://www.kernel.org/doc/man-pages/ Linux/UNIX System Programming Training: http://man7.org/training/