From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-wm1-x32d.google.com (mail-wm1-x32d.google.com [IPv6:2a00:1450:4864:20::32d]) by sourceware.org (Postfix) with ESMTPS id 946C63987C1D for ; Mon, 10 May 2021 17:56:45 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.3.2 sourceware.org 946C63987C1D Received: by mail-wm1-x32d.google.com with SMTP id n84so9721596wma.0 for ; Mon, 10 May 2021 10:56:45 -0700 (PDT) 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=QiQINs023DdxjUSHXw+cs3BjUww1InRNvyWHLtP6ZuI=; b=LYtpQPpSf51DU93JKFsuOo8BjB+9IjaCb34LiuLKEqQQnY9Bu2Xw6+pIzuj0EhblpN 8XLZNe4aGoPxJTexToED1MuykHXC11fIVQ9Sh4t9MqXMStHWUBMnBNyQDpLkhSjDsW0p Cgo1rsocLn2UYTww2OGgD6bcN0KalTVeARernZMaSEElNxWAd3mzUiJswUrRsgIXsHgw z5rztqoa2H8DE9Ea75tNCvsuEBea9hX+uTpWQvuYbergOjhfsXcgYXHUENs/z/isHKR8 +quBWqkt1A8U6cxQV25J8vmy+0P0UJJogBNednhuXUxms5UQsOPBUA5nz4pozvDfpgHn gxLA== X-Gm-Message-State: AOAM5308X+gGddM+/RkHNd228LIdBJaQ/1sN94WrFFxy6x60YQ/cTX+A jJ+DoNZmESIJcbnmGnBByU8= X-Google-Smtp-Source: ABdhPJyPJ7hQIGHIWCwWx/MI5WHSbhtfdHgrn5mPMrCuuXO+QOq3mA9Mqt2WM8TfVhSTTHZk7qTQ3A== X-Received: by 2002:a05:600c:41d4:: with SMTP id t20mr412878wmh.46.1620669404722; Mon, 10 May 2021 10:56:44 -0700 (PDT) Received: from sqli.sqli.com ([195.53.121.100]) by smtp.googlemail.com with ESMTPSA id m13sm24318830wrw.86.2021.05.10.10.56.43 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 10 May 2021 10:56:44 -0700 (PDT) From: Alejandro Colomar To: mtk.manpages@gmail.com Cc: Florian Weimer , Jakub Wilk , Alejandro Colomar , linux-man@vger.kernel.org, libc-alpha@sourceware.org Subject: [PATCH 19/39] membarrier.2: Use syscall(SYS_...); for system calls without a wrapper Date: Mon, 10 May 2021 19:55:28 +0200 Message-Id: <20210510175546.28445-20-alx.manpages@gmail.com> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210510175546.28445-1-alx.manpages@gmail.com> References: <20210510175546.28445-1-alx.manpages@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Spam-Status: No, score=-12.3 required=5.0 tests=BAYES_00, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, DKIM_VALID_EF, FREEMAIL_FROM, GIT_PATCH_0, RCVD_IN_DNSWL_NONE, SPF_HELO_NONE, SPF_PASS, TXREP autolearn=ham autolearn_force=no version=3.4.2 X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on server2.sourceware.org X-BeenThere: libc-alpha@sourceware.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Libc-alpha mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 10 May 2021 17:56:46 -0000 Signed-off-by: Alejandro Colomar --- man2/membarrier.2 | 16 ++++++++++------ 1 file changed, 10 insertions(+), 6 deletions(-) diff --git a/man2/membarrier.2 b/man2/membarrier.2 index 851f5d59f..fec82f228 100644 --- a/man2/membarrier.2 +++ b/man2/membarrier.2 @@ -28,13 +28,20 @@ membarrier \- issue memory barriers on a set of threads .SH SYNOPSIS .nf .PP -.B #include +.BR "#include " \ +" /* Definition of " MEMBARRIER_* " constants */" +.BR "#include " " /* Definition of " SYS_* " constants */" +.B #include .PP -.BI "int membarrier(int " cmd ", unsigned int " flags ", int " cpu_id ); +.BI "int syscall(SYS_membarrier, int " cmd ", unsigned int " flags \ +", int " cpu_id ); .fi .PP .IR Note : -There is no glibc wrapper for this system call; see NOTES. +glibc provides no wrapper for +.BR membarrier (), +necessitating the use of +.BR syscall (2). .SH DESCRIPTION The .BR membarrier () @@ -322,9 +329,6 @@ 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 -- 2.31.1