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 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7E26FC433F5 for ; Wed, 17 Nov 2021 15:57:04 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 61B7B61B1B for ; Wed, 17 Nov 2021 15:57:04 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238913AbhKQQAB (ORCPT ); Wed, 17 Nov 2021 11:00:01 -0500 Received: from mail.kernel.org ([198.145.29.99]:48444 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S238883AbhKQP74 (ORCPT ); Wed, 17 Nov 2021 10:59:56 -0500 Received: by mail.kernel.org (Postfix) with ESMTPSA id 66CA360EE4; Wed, 17 Nov 2021 15:56:56 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1637164618; bh=UnQvcvpPch96ILO10ZHnFKIO+yVSOutunoWjIkOFA1g=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=rPvqisjuThazQPe7EUG2iNiuD5783uw0xMpJRJLzkvdPJWuDv+Xmrysyaj7ZNQcUo FBbeirrADbEWeVWr35Z3FUKW3T7kSPYtuppqKs4dX1T46KId1G/lybhjp7M4KsfnnS a0oHKf7pncos/p2GtoZ2amtsl/6DiX8deKFA2TeTOeUWnt6fvozi4r4vQUdqwtf5M8 hlkFoQSsQeQStaJMFoY1UOyh4+F/Z2D1F/NdALYWeM+jtyvvbP8FcOsfuV0OiT7OmV 8dyu7H23fbmuGyj5HjDLn1wUmophLQEazmrvAV/Ax0cIZlkew3uSSCN9XE2K6UzCww 0Vrk18N7Goe6A== From: Frederic Weisbecker To: "Paul E . McKenney" Cc: LKML , Frederic Weisbecker , Uladzislau Rezki , Neeraj Upadhyay , Boqun Feng , Josh Triplett , Joel Fernandes , rcu@vger.kernel.org Subject: [PATCH 6/6] rcu/nocb: Merge rcu_spawn_cpu_nocb_kthread() and rcu_spawn_one_nocb_kthread() Date: Wed, 17 Nov 2021 16:56:37 +0100 Message-Id: <20211117155637.363706-7-frederic@kernel.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20211117155637.363706-1-frederic@kernel.org> References: <20211117155637.363706-1-frederic@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org rcu_spawn_one_nocb_kthread() is only called by rcu_spawn_cpu_nocb_kthread(). Don't bother with two separate functions and merge them. Signed-off-by: Frederic Weisbecker Cc: Neeraj Upadhyay Cc: Boqun Feng Cc: Uladzislau Rezki Cc: Josh Triplett Cc: Joel Fernandes --- kernel/rcu/tree_nocb.h | 15 ++++----------- 1 file changed, 4 insertions(+), 11 deletions(-) diff --git a/kernel/rcu/tree_nocb.h b/kernel/rcu/tree_nocb.h index 3845f1885ffc..248b90333b08 100644 --- a/kernel/rcu/tree_nocb.h +++ b/kernel/rcu/tree_nocb.h @@ -1217,12 +1217,15 @@ static void __init rcu_boot_init_nocb_percpu_data(struct rcu_data *rdp) * rcuo CB kthread, spawn it. Additionally, if the rcuo GP kthread * for this CPU's group has not yet been created, spawn it as well. */ -static void rcu_spawn_one_nocb_kthread(int cpu) +static void rcu_spawn_cpu_nocb_kthread(int cpu) { struct rcu_data *rdp = per_cpu_ptr(&rcu_data, cpu); struct rcu_data *rdp_gp; struct task_struct *t; + if (!rcu_scheduler_fully_active || !rcu_nocb_is_setup) + return; + /* If it already has an rcuo kthread, then nothing to do. */ if (rdp->nocb_cb_kthread) return; @@ -1246,16 +1249,6 @@ static void rcu_spawn_one_nocb_kthread(int cpu) WRITE_ONCE(rdp->nocb_gp_kthread, rdp_gp->nocb_gp_kthread); } -/* - * If the specified CPU is a no-CBs CPU that does not already have its - * rcuo kthread, spawn it. - */ -static void rcu_spawn_cpu_nocb_kthread(int cpu) -{ - if (rcu_scheduler_fully_active && rcu_nocb_is_setup) - rcu_spawn_one_nocb_kthread(cpu); -} - /* * Once the scheduler is running, spawn rcuo kthreads for all online * no-CBs CPUs. This assumes that the early_initcall()s happen before -- 2.25.1