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=-12.6 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable 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 44F04C433E2 for ; Thu, 10 Sep 2020 21:17:50 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 0AA0321D92 for ; Thu, 10 Sep 2020 21:17:50 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="Lrf/nS2w" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728129AbgIJVRr (ORCPT ); Thu, 10 Sep 2020 17:17:47 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:34814 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728070AbgIJVPM (ORCPT ); Thu, 10 Sep 2020 17:15:12 -0400 Received: from mail-wm1-x342.google.com (mail-wm1-x342.google.com [IPv6:2a00:1450:4864:20::342]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1D365C0617B1; Thu, 10 Sep 2020 14:14:35 -0700 (PDT) Received: by mail-wm1-x342.google.com with SMTP id b79so2084088wmb.4; Thu, 10 Sep 2020 14:14:35 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=0rmRvieIxW6w6Hujt5CiR0Rwq1pQq0cocC0G8EaOjkE=; b=Lrf/nS2wudBHaIRCI6azYCYMZ+8s/X4Ec3o/uNo8iU89ykB2ev1ibIGe1wmkUKQmrn aYYwsYgTxv0GuJqazaU1fo2rq5nikDob0pS2p3mkgwTmZ7ppjXUreLVIIvKqj0gzLNdf GwQowtnhIrwSylUXAvNTr4rZ66w9QM1ysuIcRezq+MXqrpDQMSy6XQGDMqJvXRpyhuq+ ShXG4T8cHoIoYQu6ZRDaFJEusN0qyVRtP9Tldhdro+pCx9lkqMEybafRgZMOJi1RwZRN 7gVqarjdPHO5kg/uEEGcp3HT8PvlmQtD6GBW7Iy8LRTJgiBinYZ4AciF4usjPJd+jc7C cNDA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=0rmRvieIxW6w6Hujt5CiR0Rwq1pQq0cocC0G8EaOjkE=; b=YQbiBQBgrF6dB2G51xgp8yXOnpb3EQSOtQmCVGJIPaHRMJwdUOpK9VuVacCjv/N/6b MZ/4pzxVZmicpDuLCFHqSuQOtVs0eKjyqMjxznVIYk7M7ZsYbjoPfOrCkN/v6/BBMHux k+fXj0ilsKfC6qamsrZIKHFXQFeP7OWwvsoSUSC8I0HwiCtF8xhdwbDYRl6f4seJ6su4 6e9OrQaOhQIt9dEoX1E5hCHHjF7+uweNZ3d4VUaFFj6sxcw+rvlduegelUNcfSZ7Ogg1 zMpGj3Xa5oRWml4OByu6embpNwQmRlUcVcQB+IExNen/CJsgme7OZAE0Cp4svcs75P4p 8yCw== X-Gm-Message-State: AOAM531I7oUe3oAXM5KmTEG6tBhXnccjhPgGrAjrqsZoJlQ3VJD0tL/+ GHBR9+Vaf4OCm/D4Vcnc4XisnbiWbjxZpQ== X-Google-Smtp-Source: ABdhPJxkO127Dd8c0CWq4p8iMgimgA8Gt8rCKHI8qRygPG1kKnxfptqFXCeDu/JSucjOXlGqR9V3OQ== X-Received: by 2002:a1c:b407:: with SMTP id d7mr2029134wmf.59.1599772473857; Thu, 10 Sep 2020 14:14:33 -0700 (PDT) Received: from localhost.localdomain ([170.253.60.68]) by smtp.googlemail.com with ESMTPSA id l10sm111502wru.59.2020.09.10.14.14.32 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 10 Sep 2020 14:14:33 -0700 (PDT) From: Alejandro Colomar To: mtk.manpages@gmail.com Cc: linux-man@vger.kernel.org, linux-kernel@vger.kernel.org, Alejandro Colomar Subject: [PATCH 22/24] membarrier.2: Note that glibc does not provide a wrapper Date: Thu, 10 Sep 2020 23:13:43 +0200 Message-Id: <20200910211344.3562-23-colomar.6.4.3@gmail.com> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20200910211344.3562-1-colomar.6.4.3@gmail.com> References: <20200910211344.3562-1-colomar.6.4.3@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Notes: I copied .nf and .fi from futex.2, but they made no visual difference. What do they actually do? Signed-off-by: Alejandro Colomar --- man2/membarrier.2 | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/man2/membarrier.2 b/man2/membarrier.2 index 8825de71e..f65c6be5c 100644 --- a/man2/membarrier.2 +++ b/man2/membarrier.2 @@ -26,9 +26,15 @@ .SH NAME membarrier \- issue memory barriers on a set of threads .SH SYNOPSIS +.nf +.PP .B #include .PP .BI "int membarrier(int " cmd ", int " flags ");" +.fi +.PP +.IR Note : +There is no glibc wrapper for this system call; see NOTES. .SH DESCRIPTION The .BR membarrier () @@ -270,6 +276,9 @@ Examples where .BR membarrier () can be useful include implementations of Read-Copy-Update libraries and garbage collectors. +.PP +Glibc does not provide a wrapper for this system call; call it using +.BR syscall (2). .SH EXAMPLES Assuming a multithreaded application where "fast_path()" is executed very frequently, and where "slow_path()" is executed infrequently, the -- 2.28.0