From patchwork Wed Aug 11 20:01:30 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Adhemerval Zanella Netto X-Patchwork-Id: 44644 Return-Path: X-Original-To: patchwork@sourceware.org Delivered-To: patchwork@sourceware.org Received: from server2.sourceware.org (localhost [IPv6:::1]) by sourceware.org (Postfix) with ESMTP id 0B4463985822 for ; Wed, 11 Aug 2021 20:02:26 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 0B4463985822 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=sourceware.org; s=default; t=1628712146; bh=feeTUsAKsUafbAY2Y/NWZGzubjtkTvsbA0eMcUene0Y=; h=To:Subject:Date:In-Reply-To:References:List-Id:List-Unsubscribe: List-Archive:List-Post:List-Help:List-Subscribe:From:Reply-To:Cc: From; b=Hk5M/S+BJWrbojtlnMY8RtOstfQKwOd6pNcaGjgt65SegDiutva1Ao+CeNA63yE/h rANSnIh3iHhT/U11BBqpekx74MPPDmoaiyxh6NlgjWTtTfMCHJkQ7pLxL3q0muglve f3dVd+UKDJp0QxNAblhXBnq/hZ7K/SKIcnG+gzBc= X-Original-To: libc-alpha@sourceware.org Delivered-To: libc-alpha@sourceware.org Received: from mail-pj1-x102e.google.com (mail-pj1-x102e.google.com [IPv6:2607:f8b0:4864:20::102e]) by sourceware.org (Postfix) with ESMTPS id BAF043851C3E for ; Wed, 11 Aug 2021 20:01:42 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.1 sourceware.org BAF043851C3E Received: by mail-pj1-x102e.google.com with SMTP id fa24-20020a17090af0d8b0290178bfa69d97so6985862pjb.0 for ; Wed, 11 Aug 2021 13:01:42 -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=feeTUsAKsUafbAY2Y/NWZGzubjtkTvsbA0eMcUene0Y=; b=LVsOq76fbZslEM2odbdkQp0h+bqTFD7woJWoDwx9zfR/aZts5lvhR9gehmAhBHIUZF 6UEebNuG6LnhaqyuyDKD6XfXTJTboQwyEaTTHSIFA1qnq5OnGo6cXjHYx6uaCvs2Wa/h 2kvtH3PCiU8DAvusKd1jikW8wQLe583lBaE7CS6YfNbxkbdOsUjr0/SlaIdCXnY83Ci+ 5ISVGH13STci8VyQlZ3p7hpjTdpzt5SejQwldzcZu+bxoA8Q3//ufpcus7wFRWhrg6QU EO4e19tzjewra0zdqZGApR/jm6c1ZpvQJ6YI+UMuEKQTJ7mc7CYwuzC/4l3XV64c0qSN TORQ== X-Gm-Message-State: AOAM531GTyxRdKXwiO1DlCGNiZ4Z0ji2AxNQOugfRNNXvMpGetrLr7VR EzLQ3IE1QlmrXCji/xAdi1eQBN685wyLpw== X-Google-Smtp-Source: ABdhPJzNXo9qGLziOXUfsxCqX9IfC+FAly80KwD5n2IVwvYfQE/15P5oDEQozmXeMITL4JmmFzmIpw== X-Received: by 2002:a17:90a:b009:: with SMTP id x9mr12032187pjq.97.1628712101782; Wed, 11 Aug 2021 13:01:41 -0700 (PDT) Received: from birita.. ([2804:431:c7cb:9dce:70f4:4f7a:652c:7fb]) by smtp.gmail.com with ESMTPSA id r15sm281370pjl.29.2021.08.11.13.01.40 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 11 Aug 2021 13:01:41 -0700 (PDT) To: libc-alpha@sourceware.org Subject: [PATCH 1/4] Linux: Add FUTEX_LOCK_PI2 Date: Wed, 11 Aug 2021 17:01:30 -0300 Message-Id: <20210811200133.3869287-2-adhemerval.zanella@linaro.org> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20210811200133.3869287-1-adhemerval.zanella@linaro.org> References: <20210811200133.3869287-1-adhemerval.zanella@linaro.org> MIME-Version: 1.0 X-Spam-Status: No, score=-12.6 required=5.0 tests=BAYES_00, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, DKIM_VALID_EF, GIT_PATCH_0, KAM_NUMSUBJECT, RCVD_IN_DNSWL_NONE, SPF_HELO_NONE, SPF_PASS, TXREP autolearn=ham autolearn_force=no version=3.4.4 X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) 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-Patchwork-Original-From: Adhemerval Zanella via Libc-alpha From: Adhemerval Zanella Netto Reply-To: Adhemerval Zanella Cc: Kurt Kanzenbach Errors-To: libc-alpha-bounces+patchwork=sourceware.org@sourceware.org Sender: "Libc-alpha" From: Kurt Kanzenbach Linux v5.14.0 introduced a new futex operation called FUTEX_LOCK_PI2. This kernel feature can be used to implement pthread_mutex_clocklock(MONOTONIC)/PI. Signed-off-by: Kurt Kanzenbach Reviewed-by: Adhemerval Zanella --- sysdeps/unix/sysv/linux/kernel-features.h | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/sysdeps/unix/sysv/linux/kernel-features.h b/sysdeps/unix/sysv/linux/kernel-features.h index 3930e14322..ffb6af196b 100644 --- a/sysdeps/unix/sysv/linux/kernel-features.h +++ b/sysdeps/unix/sysv/linux/kernel-features.h @@ -220,4 +220,12 @@ # define __ASSUME_FACCESSAT2 0 #endif +/* The FUTEX_LOCK_PI2 operation was introduced across all architectures in Linux + 5.14. */ +#if __LINUX_KERNEL_VERSION >= 0x050e00 +# define __ASSUME_FUTEX_LOCK_PI2 1 +#else +# define __ASSUME_FUTEX_LOCK_PI2 0 +#endif + #endif /* kernel-features.h */