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=-15.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=ham 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 46414C07E95 for ; Tue, 13 Jul 2021 16:13:22 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 2DFD8610C7 for ; Tue, 13 Jul 2021 16:13:22 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231365AbhGMQQK (ORCPT ); Tue, 13 Jul 2021 12:16:10 -0400 Received: from Galois.linutronix.de ([193.142.43.55]:54156 "EHLO galois.linutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230225AbhGMQQG (ORCPT ); Tue, 13 Jul 2021 12:16:06 -0400 Message-Id: <20210713160746.521100804@linutronix.de> DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1626192795; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: references:references; bh=tlUoEigPQBH4kXFYwpTe4Usz351++pP85C9s1qCPS/U=; b=jtVyna5BU9L/yMxCQLb4AxxMNUYprrvwrA4tbbLUS73qiZb75Ee2D5SSW5OrmlbBYvvv9l mcOktNUYW82auXQgy6gbASRF+Fg6Bf68gGZmZUl21KVqt7cZbj058C+L+Zpmx6Y8RwO9Fj DM4LGHmB3ZuTAWNOyeE0rJHjC8DWPNMpqL1sW23YGtB4EzyY854X8bQe5YFbh+u5RknETJ IznRoBs6LY8mvBai6uPzkwTtpwQXr3NLsYfuFGFCZTGuN4AK3RWJ91gTVVI+qN/7290XF3 l3NwXutISUNJ7PVVJtFdVWUdJPzDMMFlHPWO9eboAjvYV4t9JuvCJcLgARL54Q== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1626192795; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: references:references; bh=tlUoEigPQBH4kXFYwpTe4Usz351++pP85C9s1qCPS/U=; b=Oqa/7/LSz2xmUtEE+Sl9bRbOVRk8yjz3ZpSMEGZVFOmB/QlAj/atDhnXNc6i3BCKyRHYIW nzdqQ6XMpKHsCcCA== Date: Tue, 13 Jul 2021 17:11:00 +0200 From: Thomas Gleixner To: LKML Cc: Peter Zijlstra , Ingo Molnar , Juri Lelli , Steven Rostedt , Daniel Bristot de Oliveira , Will Deacon , Waiman Long , Boqun Feng , Sebastian Andrzej Siewior , Davidlohr Bueso Subject: [patch 06/50] sched/wake_q: Provide WAKE_Q_HEAD_INITIALIZER References: <20210713151054.700719949@linutronix.de> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-transfer-encoding: 8-bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Thomas Gleixner The RT specific spin/rwlock implementation requires special handling of the to be woken waiters. Provide a WAKE_Q_HEAD_INITIALIZER which can be used by the rtmutex code to implement a RT aware wake_q derivative. Signed-off-by: Thomas Gleixner --- include/linux/sched/wake_q.h | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) --- diff --git a/include/linux/sched/wake_q.h b/include/linux/sched/wake_q.h index 26a2013ac39c..06cd8fb2f409 100644 --- a/include/linux/sched/wake_q.h +++ b/include/linux/sched/wake_q.h @@ -42,8 +42,11 @@ struct wake_q_head { #define WAKE_Q_TAIL ((struct wake_q_node *) 0x01) -#define DEFINE_WAKE_Q(name) \ - struct wake_q_head name = { WAKE_Q_TAIL, &name.first } +#define WAKE_Q_HEAD_INITIALIZER(name) \ + { WAKE_Q_TAIL, &name.first } + +#define DEFINE_WAKE_Q(name) \ + struct wake_q_head name = WAKE_Q_HEAD_INITIALIZER(name) static inline void wake_q_init(struct wake_q_head *head) {