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,URIBL_BLOCKED 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 02A05C4338F for ; Thu, 5 Aug 2021 15:41:45 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id DBDCA61151 for ; Thu, 5 Aug 2021 15:41:44 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S242350AbhHEPly (ORCPT ); Thu, 5 Aug 2021 11:41:54 -0400 Received: from Galois.linutronix.de ([193.142.43.55]:43616 "EHLO galois.linutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S242273AbhHEPl3 (ORCPT ); Thu, 5 Aug 2021 11:41:29 -0400 Message-ID: <20210805153953.212032325@linutronix.de> DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1628178074; 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=7CBCUxlgHeb+vOFixqTSYYb16Nxvav4y8tgc2d3NAcQ=; b=tvLhX+kdd0bjImwhUzhPNl6YpjO+IOKyt8HOTmcXAuzF4bwHQu8mB25PdTTVIoh6nDSxU6 +P5E2i+p15woMSvhw5Ld/q2FoBCXVtQT9FImMwL558nSToxyZHbdY6g3QWoyvbEiGgTQUu aASGf7P7Tl7g8l008k0ddkxYkMgqQMxo+YjwQMdyiC1stZBbBaUlyMMPgZOqDOUACM8jEO Shdi3PuOsyBrnPz8YaNndsojAqhggftDyNmSo313m+MycXP4tDlUYzA85RTXgjtCEJtFOe HUmoh6Xi0gXBIY6Acy8UXrJsNiEaZ0Ikm/qF0NxpOSHyUi0JhHBATNQwE5FC8w== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1628178074; 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=7CBCUxlgHeb+vOFixqTSYYb16Nxvav4y8tgc2d3NAcQ=; b=oV4+W0Uf8nsOgAxauTicnDP9q33UPJwekqP+NR0V6c2saxKta6A6uy4NKX43uq/mCUy1KT 4n9F/lpT2UfxzxBg== Date: Thu, 05 Aug 2021 17:13:07 +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 , Mike Galbraith Subject: [patch V3 07/64] sched/wake_q: Provide WAKE_Q_HEAD_INITIALIZER References: <20210805151300.330412127@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(-) --- --- 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) {