From nobody Thu Oct 2 03:28:38 2025 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 55822328995; Tue, 23 Sep 2025 14:21:56 +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=1758637316; cv=none; b=RkYgyi07e4mLtMHImiXzuhD5asQZu8aZb6ou0Fyhl4w2gx8dQx45VqXsubPmr9RnaUbOGoIOxy1x5NsoAGsfup5ysU4+BSD2eZD345c7+C+qH0OA7DBtZ3wByTpMN8xiIM/WsBtDO3u0skpBRWpmlxfq6rcvVEaF6/QoQND5iYg= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1758637316; c=relaxed/simple; bh=dnfn0DMyZqHCyXyDBX7gMCl/aLGTGuiQmNJ7YTCoJDk=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=oDpH6GrVeLyjPnXM8vtGGZDme181ZFh6hNTw9kZje6dmCcCcjqefrpcP1KvLrWvIqqedbWNzWbuuOzpFJojravS8/Aa/foYKD0JBxxVlS4/rPPXMR4Fmb3wyKw3U7B8ssRHnutS0wBsrvlcj5vp4jVfufCQjzllYigrx4JrWowY= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=ParMViib; 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="ParMViib" Received: by smtp.kernel.org (Postfix) with ESMTPSA id A49DAC2BCB2; Tue, 23 Sep 2025 14:21:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1758637316; bh=dnfn0DMyZqHCyXyDBX7gMCl/aLGTGuiQmNJ7YTCoJDk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=ParMViibAmTiqgmB/IaxzQprSDe/SSYbMrxjZuNxLy6Idjo9dZ7kQRw5NzLellG2E hdKH2/297Ey+6gSGkBjDXb4/ZDFRBrQzOY9vXUK2yxKxg+3gPPSMIo2x8xbxFuQ/5v r0fp5fj4bGXlHXxTf7x14SxjGtQlO7ghIBG6/YSqqC8Ogg1UE3CBQNuPi+t83qCLgE tkxOWoIDWawKIiXakty6VpJhY74sIQ6ZwH1dJ84lgAFTg/Bs87rdGGqOuo39B8shU0 mckXAWK0ZLywViwmRrPaYRUZ8xDOFZyypZDu+y7phQ29h+HW+aOFoArhKjmm5GNt7J Rzili71TsYQQg== Received: by paulmck-ThinkPad-P17-Gen-1.home (Postfix, from userid 1000) id D7442CE1418; Tue, 23 Sep 2025 07:20:37 -0700 (PDT) From: "Paul E. McKenney" To: rcu@vger.kernel.org Cc: linux-kernel@vger.kernel.org, kernel-team@meta.com, rostedt@goodmis.org, "Paul E. McKenney" , Andrii Nakryiko , Alexei Starovoitov , Peter Zijlstra , bpf@vger.kernel.org Subject: [PATCH 13/34] rcu: Remove now-empty get_rcu_tasks_trace_gp_kthread() function Date: Tue, 23 Sep 2025 07:20:15 -0700 Message-Id: <20250923142036.112290-13-paulmck@kernel.org> X-Mailer: git-send-email 2.40.1 In-Reply-To: <580ea2de-799a-4ddc-bde9-c16f3fb1e6e7@paulmck-laptop> References: <580ea2de-799a-4ddc-bde9-c16f3fb1e6e7@paulmck-laptop> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" The get_rcu_tasks_trace_gp_kthread() is used by rcuscale to diagnose bugs involving the RCU Tasks Trace grace-period kthread, which now no longer exists. This commit therefore removes this function. Signed-off-by: Paul E. McKenney Cc: Andrii Nakryiko Cc: Alexei Starovoitov Cc: Peter Zijlstra Cc: --- include/linux/rcupdate_trace.h | 1 - kernel/rcu/rcuscale.c | 1 - kernel/rcu/tasks.h | 6 ------ 3 files changed, 8 deletions(-) diff --git a/include/linux/rcupdate_trace.h b/include/linux/rcupdate_trace.h index ffd4dcd6339ae4..0bd47f12ecd17b 100644 --- a/include/linux/rcupdate_trace.h +++ b/include/linux/rcupdate_trace.h @@ -137,7 +137,6 @@ static inline void rcu_barrier_tasks_trace(void) =20 // Placeholders to enable stepwise transition. void __init rcu_tasks_trace_suppress_unused(void); -struct task_struct *get_rcu_tasks_trace_gp_kthread(void); =20 #else /* diff --git a/kernel/rcu/rcuscale.c b/kernel/rcu/rcuscale.c index 16ba9050dab66b..17d038e26b65de 100644 --- a/kernel/rcu/rcuscale.c +++ b/kernel/rcu/rcuscale.c @@ -411,7 +411,6 @@ static struct rcu_scale_ops tasks_tracing_ops =3D { .gp_barrier =3D rcu_barrier_tasks_trace, .sync =3D synchronize_rcu_tasks_trace, .exp_sync =3D synchronize_rcu_tasks_trace, - .rso_gp_kthread =3D get_rcu_tasks_trace_gp_kthread, .name =3D "tasks-tracing" }; =20 diff --git a/kernel/rcu/tasks.h b/kernel/rcu/tasks.h index 4fb61b3c78283d..e70609c85ece5d 100644 --- a/kernel/rcu/tasks.h +++ b/kernel/rcu/tasks.h @@ -1467,12 +1467,6 @@ void __init rcu_tasks_trace_suppress_unused(void) rcu_tasks_torture_stats_print_generic(NULL, NULL, NULL, NULL); } =20 -struct task_struct *get_rcu_tasks_trace_gp_kthread(void) -{ - return NULL; -} -EXPORT_SYMBOL_GPL(get_rcu_tasks_trace_gp_kthread); - #endif /* #else #ifdef CONFIG_TASKS_TRACE_RCU */ =20 #ifndef CONFIG_TINY_RCU --=20 2.40.1