From nobody Sun Feb 8 07:25:31 2026 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 84888EB64DA for ; Wed, 12 Jul 2023 16:22:04 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231678AbjGLQWD (ORCPT ); Wed, 12 Jul 2023 12:22:03 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52204 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232278AbjGLQVg (ORCPT ); Wed, 12 Jul 2023 12:21:36 -0400 Received: from mail-io1-xd2a.google.com (mail-io1-xd2a.google.com [IPv6:2607:f8b0:4864:20::d2a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 67EE02D59 for ; Wed, 12 Jul 2023 09:20:34 -0700 (PDT) Received: by mail-io1-xd2a.google.com with SMTP id ca18e2360f4ac-785ccd731a7so75963539f.0 for ; Wed, 12 Jul 2023 09:20:34 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel-dk.20221208.gappssmtp.com; s=20221208; t=1689178832; x=1689783632; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=77utXKVr289Xtr5SK547E9baZFV+ka7R8kIV3jn3wns=; b=gI7rciFjThQqgqqmYCaizMxtrpZSxtzzwsi+S4mnL2b5gO6BE9BzQPtDNH/9CnF1R2 TYsXynQEGEhMXgqSFBIM0A+iqu1UDPWYs12q2bd/tt0VFJAGL57hR6qvo/h/CmfGDniL Iq9oXIMhd347hbYW0TO+mD1BeprT8njB6m1kIWXvitA8yTVsonbh9Cp+iIP1ew+yPVko lBhPsCWnpvbHm9FMXAHpbMtI9sBUBC0Ko3W2X04aQziXeH5Fozi4QVVWyhMwrQ4tUT5o eD71S3XbQ2wgGPMoqSoi6AdlIQlnbPHk/YsuhIdOQJkgt/luk+Xr2sL3LPqrwph437eG PzDA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1689178832; x=1689783632; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=77utXKVr289Xtr5SK547E9baZFV+ka7R8kIV3jn3wns=; b=XwoIWOXHK0hhK9bNzNQLyLq6HHdm1YRz8bQMT9eXG9/9Ttj9Het+SkoiupFkSFuzso DscwLjrfmcY/B8GgcJS5E1PGrmkEo0aCZDrmEnyrfET0rNiMU+iipOfaK8xK0sWNwor2 4LBJ0mB0Ao6PeZ0w78jQE2ftYjdMridim30JuakKfMcjRvf1Y4cHrWKpXq/t1M1JaqKG /mPTaxNbMMm/fSERCHqNhIE5H2KLxvgemdMw03ZpSvr1rsma2oIB/9Kp93qToZ4oYHtP DNoBPmKprurvRQkDLYZfGVBewePfgj9Xs6Hoa6Kz256tX27KpYagIHXJ51oNLi+zb2J0 /qxQ== X-Gm-Message-State: ABy/qLZ/Y7Ts01ulsjuL5xReP0/KIMJTwzBq7iQl2U5eGU/y1Kk7uRXS 1w1B5wL9f9aCk5q6KYHf7vpFgA== X-Google-Smtp-Source: APBJJlH06yLgDahSs0qD1tZReckWNo0TVLhdg4jwmBuajcUVoiSOQHr6O3rmk1lUs1zb3/yCDPdADQ== X-Received: by 2002:a05:6602:2f14:b0:783:6ec1:65f6 with SMTP id q20-20020a0566022f1400b007836ec165f6mr24774001iow.1.1689178831951; Wed, 12 Jul 2023 09:20:31 -0700 (PDT) Received: from localhost.localdomain ([96.43.243.2]) by smtp.gmail.com with ESMTPSA id x24-20020a029718000000b0042aec33bc26sm1328775jai.18.2023.07.12.09.20.30 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 12 Jul 2023 09:20:31 -0700 (PDT) From: Jens Axboe To: io-uring@vger.kernel.org, linux-kernel@vger.kernel.org Cc: tglx@linutronix.de, mingo@redhat.com, peterz@infradead.org, andres@anarazel.de, Jens Axboe Subject: [PATCH 6/8] futex: make futex_parse_waitv() available as a helper Date: Wed, 12 Jul 2023 10:20:15 -0600 Message-Id: <20230712162017.391843-7-axboe@kernel.dk> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20230712162017.391843-1-axboe@kernel.dk> References: <20230712162017.391843-1-axboe@kernel.dk> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" To make it more generically useful, augment it with allowing the caller to pass in the wake handler and wake data. Convert the futex_waitv() syscall, passing in the default handlers. Signed-off-by: Jens Axboe --- kernel/futex/futex.h | 5 +++++ kernel/futex/syscalls.c | 14 ++++++++++---- 2 files changed, 15 insertions(+), 4 deletions(-) diff --git a/kernel/futex/futex.h b/kernel/futex/futex.h index 24180a95bdc8..f6598d8451fb 100644 --- a/kernel/futex/futex.h +++ b/kernel/futex/futex.h @@ -285,6 +285,11 @@ struct futex_vector { struct futex_q q; }; =20 +extern int futex_parse_waitv(struct futex_vector *futexv, + struct futex_waitv __user *uwaitv, + unsigned int nr_futexes, futex_wake_fn *wake, + void *wake_data); + extern int futex_wait_multiple(struct futex_vector *vs, unsigned int count, struct hrtimer_sleeper *to); =20 diff --git a/kernel/futex/syscalls.c b/kernel/futex/syscalls.c index 0b63d5bcdc77..fc3cdd0fefab 100644 --- a/kernel/futex/syscalls.c +++ b/kernel/futex/syscalls.c @@ -184,12 +184,15 @@ SYSCALL_DEFINE6(futex, u32 __user *, uaddr, int, op, = u32, val, * @futexv: Kernel side list of waiters to be filled * @uwaitv: Userspace list to be parsed * @nr_futexes: Length of futexv + * @wake: Wake to call when futex is woken + * @wake_data: Data for the wake handler * * Return: Error code on failure, 0 on success */ -static int futex_parse_waitv(struct futex_vector *futexv, - struct futex_waitv __user *uwaitv, - unsigned int nr_futexes) +int futex_parse_waitv(struct futex_vector *futexv, + struct futex_waitv __user *uwaitv, + unsigned int nr_futexes, futex_wake_fn *wake, + void *wake_data) { struct futex_waitv aux; unsigned int i; @@ -208,6 +211,8 @@ static int futex_parse_waitv(struct futex_vector *futex= v, futexv[i].w.val =3D aux.val; futexv[i].w.uaddr =3D aux.uaddr; futexv[i].q =3D futex_q_init; + futexv[i].q.wake =3D wake; + futexv[i].q.wake_data =3D wake_data; } =20 return 0; @@ -284,7 +289,8 @@ SYSCALL_DEFINE5(futex_waitv, struct futex_waitv __user = *, waiters, goto destroy_timer; } =20 - ret =3D futex_parse_waitv(futexv, waiters, nr_futexes); + ret =3D futex_parse_waitv(futexv, waiters, nr_futexes, futex_wake_mark, + NULL); if (!ret) ret =3D futex_wait_multiple(futexv, nr_futexes, timeout ? &to : NULL); =20 --=20 2.40.1