From patchwork Wed Jul 12 00:47:00 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jens Axboe X-Patchwork-Id: 13309483 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 6E362EB64DD for ; Wed, 12 Jul 2023 00:47:18 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231208AbjGLArQ (ORCPT ); Tue, 11 Jul 2023 20:47:16 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39010 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231192AbjGLArQ (ORCPT ); Tue, 11 Jul 2023 20:47:16 -0400 Received: from mail-pl1-x62d.google.com (mail-pl1-x62d.google.com [IPv6:2607:f8b0:4864:20::62d]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1E6691720 for ; Tue, 11 Jul 2023 17:47:15 -0700 (PDT) Received: by mail-pl1-x62d.google.com with SMTP id d9443c01a7336-1b898cfa6a1so9141005ad.1 for ; Tue, 11 Jul 2023 17:47:15 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel-dk.20221208.gappssmtp.com; s=20221208; t=1689122834; x=1689727634; 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=hJHEVsPXGWHqsJoWMs2SXGP/dgciG32UfjRi0VGCdeE=; b=PZeJ886W/oAqgibJDnI4kMYditvxSoDVVQKUvsrNa6hJC2RciZA4/XDfJbR/GFiJcN ziVXQ6rMuYZcDOBUm+002+A8xu5/3nUOR+nkF0SskrybnMXQlzcoOyf9QgVa6gOo7Hr5 vH+/r53KV/aDbsyM/bey7jiPFwKUvp3X7j2A/TcHXzjYybSjN2nSQBAutTZ4J0md1epR d2tTzmRdCc6X06ovP75BVgVzDlBQNm9eHwaMb2fa7UeeHFHzmu3gXWREQuOW1djjmt25 VongB2IiDsFM//BzOqjvdT6HPbjxrnHtUf35tzLaB3HKf9zQZEZBiU1Ulvty3mlv22fa ei8A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1689122834; x=1689727634; 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=hJHEVsPXGWHqsJoWMs2SXGP/dgciG32UfjRi0VGCdeE=; b=H9SrKD67rqW7BSqKzZVSJ6bGCCxV1WW74uTIqstAXw0QJkPhO6QNcjIV9WaLdULZC4 kvWYXFX/Bxg+xP5xjpL76mYk/TS3llWebL2IU8UrrHPqcU4BY/QO2epDi594JTPWIc/Y G+h+MQ1i93+Yim0VL//7nyWFByYK6ZKHh0m5FSHr+5pHCdRvVohitFp+oc9D8zYAi0I5 pxjsL6Ru7Hkpo9ClrrbBfRFbSDUsmlflWfAgplknem8MxqbOKvn2lMX367vV1TWfCfvu b1Rrzz/jTmkqO2rKSn0QpzVLSYWVUkGZr/sHKDsDxfiKQRqJ7ACkEXjFIk7Iu/G3fVty A54w== X-Gm-Message-State: ABy/qLZITSN8Gug2GDBYdZclbuDKvk/8Xwj1WR+TJv899rMToo1K9unp lwSFRVxO58Twnj3TktwwkTs7lJTd3DW2UyOh1OE= X-Google-Smtp-Source: APBJJlHkC3A+zq7LnnwLbWkAjzljLxsmHgWHDTPfiPM2JKusBK2JcHM6qTyQrQZ+Ys67Lt9qbLklAA== X-Received: by 2002:a17:902:f68c:b0:1b8:17e8:547e with SMTP id l12-20020a170902f68c00b001b817e8547emr21541502plg.1.1689122834238; Tue, 11 Jul 2023 17:47:14 -0700 (PDT) Received: from localhost.localdomain ([198.8.77.157]) by smtp.gmail.com with ESMTPSA id s8-20020a170902b18800b001b694140d96sm2543542plr.170.2023.07.11.17.47.12 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 11 Jul 2023 17:47:13 -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, Jens Axboe Subject: [PATCH 2/7] futex: factor out the futex wake handling Date: Tue, 11 Jul 2023 18:47:00 -0600 Message-Id: <20230712004705.316157-3-axboe@kernel.dk> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20230712004705.316157-1-axboe@kernel.dk> References: <20230712004705.316157-1-axboe@kernel.dk> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: io-uring@vger.kernel.org In preparation for having another waker that isn't futex_wake_mark(), add a wake handler in futex_q. No extra data is associated with the handler outside of struct futex_q itself. futex_wake_mark() is defined as the standard wakeup helper, now set through futex_q_init like other defaults. Signed-off-by: Jens Axboe --- kernel/futex/futex.h | 4 ++++ kernel/futex/requeue.c | 3 ++- kernel/futex/waitwake.c | 6 +++--- 3 files changed, 9 insertions(+), 4 deletions(-) diff --git a/kernel/futex/futex.h b/kernel/futex/futex.h index d2949fca37d1..8eaf1a5ce967 100644 --- a/kernel/futex/futex.h +++ b/kernel/futex/futex.h @@ -69,6 +69,9 @@ struct futex_pi_state { union futex_key key; } __randomize_layout; +struct futex_q; +typedef void (futex_wake_fn)(struct wake_q_head *wake_q, struct futex_q *q); + /** * struct futex_q - The hashed futex queue entry, one per waiting task * @list: priority-sorted list of tasks waiting on this futex @@ -98,6 +101,7 @@ struct futex_q { struct task_struct *task; spinlock_t *lock_ptr; + futex_wake_fn *wake; union futex_key key; struct futex_pi_state *pi_state; struct rt_mutex_waiter *rt_waiter; diff --git a/kernel/futex/requeue.c b/kernel/futex/requeue.c index cba8b1a6a4cc..e892bc6c41d8 100644 --- a/kernel/futex/requeue.c +++ b/kernel/futex/requeue.c @@ -58,6 +58,7 @@ enum { const struct futex_q futex_q_init = { /* list gets initialized in futex_queue()*/ + .wake = futex_wake_mark, .key = FUTEX_KEY_INIT, .bitset = FUTEX_BITSET_MATCH_ANY, .requeue_state = ATOMIC_INIT(Q_REQUEUE_PI_NONE), @@ -591,7 +592,7 @@ int futex_requeue(u32 __user *uaddr1, unsigned int flags, u32 __user *uaddr2, /* Plain futexes just wake or requeue and are done */ if (!requeue_pi) { if (++task_count <= nr_wake) - futex_wake_mark(&wake_q, this); + this->wake(&wake_q, this); else requeue_futex(this, hb1, hb2, &key2); continue; diff --git a/kernel/futex/waitwake.c b/kernel/futex/waitwake.c index ba01b9408203..3471af87cb7d 100644 --- a/kernel/futex/waitwake.c +++ b/kernel/futex/waitwake.c @@ -174,7 +174,7 @@ int futex_wake(u32 __user *uaddr, unsigned int flags, int nr_wake, u32 bitset) if (!(this->bitset & bitset)) continue; - futex_wake_mark(&wake_q, this); + this->wake(&wake_q, this); if (++ret >= nr_wake) break; } @@ -289,7 +289,7 @@ int futex_wake_op(u32 __user *uaddr1, unsigned int flags, u32 __user *uaddr2, ret = -EINVAL; goto out_unlock; } - futex_wake_mark(&wake_q, this); + this->wake(&wake_q, this); if (++ret >= nr_wake) break; } @@ -303,7 +303,7 @@ int futex_wake_op(u32 __user *uaddr1, unsigned int flags, u32 __user *uaddr2, ret = -EINVAL; goto out_unlock; } - futex_wake_mark(&wake_q, this); + this->wake(&wake_q, this); if (++op_ret >= nr_wake2) break; }