From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id C790A26A087 for ; Wed, 28 May 2025 08:11:13 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1748419873; cv=none; b=i9i5j2pF+PfVur2hNBl97uUipAwP7GmGZQd3LmSZsDCpuHh0v0rFTU6oPC8W2HyJoZuyE2bz4Uip/CSCAqNbPnxdeTZffA8MD3HQ3B/GeEH2lmhhTunsDNefDOxTcARQL3oFkKb1bJ1QwT5HOH7aCLKoIaUGD/VxPP46j+7auYA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1748419873; c=relaxed/simple; bh=Miv7nCGwvNTejjIOfYKmadg9kS3OXpi2GOuOWy9Ycc8=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=VamRZYqDqif44E3pEcnIF7wVD8SkisUFKR5NB+iIJOQV7lhl4JIl3WRSybt9CGgAS/KyoijQ75y+UBv/oppWDpglIpjpU2oa8IUZLBTivHqx56O4VFgMOceJ9j7JmtBlR/ZIIWrmZXwtoze+DLzkXgbuc5e7KKtJI3rj/vvr620= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=fAGspQnp; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="fAGspQnp" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 41E53C4CEE7; Wed, 28 May 2025 08:11:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1748419873; bh=Miv7nCGwvNTejjIOfYKmadg9kS3OXpi2GOuOWy9Ycc8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=fAGspQnplhd7jSQyrvyLcekSXjStDCnmfp1FrblhUhIoxdeCms0KraRIpkcuPHGKC wKF6twwr9us1JVbFWmS1gfz7udwb+GY8p4blrhXbK8plFps9/olr2pJnRERMQcyUOD NI7Cmm+DuV3i93ONKZ7ZLMYLe/1hI3ISiX5cEKj7NvVnC8Kr1AGIPyeG3+0lWLqGPv nCqZkzNtx9wmagoGEfPIojQY7vmMQ2JIssSgTzxxHc9WKRFPbsRGct1XsDD70I/chC SAD0Cbsbs2kzGhs0FnpnV+p8aaaK68YJzjON+GNr7pmb4ao/5zrhWiFYgGqvTGduui OEKb1/TrUQkog== From: Ingo Molnar To: linux-kernel@vger.kernel.org Cc: Dietmar Eggemann , Linus Torvalds , Peter Zijlstra , Shrikanth Hegde , Thomas Gleixner , Valentin Schneider , Steven Rostedt , Mel Gorman , Vincent Guittot , Sebastian Andrzej Siewior , Ingo Molnar , Juri Lelli Subject: [PATCH 24/43] sched/smp: Use the SMP version of __task_needs_rq_lock() Date: Wed, 28 May 2025 10:09:05 +0200 Message-ID: <20250528080924.2273858-25-mingo@kernel.org> X-Mailer: git-send-email 2.45.2 In-Reply-To: <20250528080924.2273858-1-mingo@kernel.org> References: <20250528080924.2273858-1-mingo@kernel.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Simplify the scheduler by making formerly SMP-only primitives and data structures unconditional. Signed-off-by: Ingo Molnar Cc: Dietmar Eggemann Cc: Juri Lelli Cc: Linus Torvalds Cc: Mel Gorman Cc: Peter Zijlstra Cc: Shrikanth Hegde Cc: Steven Rostedt Cc: Valentin Schneider Cc: Vincent Guittot --- kernel/sched/core.c | 2 -- 1 file changed, 2 deletions(-) diff --git a/kernel/sched/core.c b/kernel/sched/core.c index 850f39fe5b8f..9eefc74f35a8 100644 --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -4308,14 +4308,12 @@ static bool __task_needs_rq_lock(struct task_struct *p) if (p->on_rq) return true; -#ifdef CONFIG_SMP /* * Ensure the task has finished __schedule() and will not be referenced * anymore. Again, see try_to_wake_up() for a longer comment. */ smp_rmb(); smp_cond_load_acquire(&p->on_cpu, !VAL); -#endif return false; } -- 2.45.2