From nobody Fri Dec 19 16:04:34 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 C9FFB34B1A3; Wed, 5 Nov 2025 20:32:20 +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=1762374740; cv=none; b=lNu2xDmxh7aU4nxd7B0uV/gA5xuKJ0X/ZjfqzAGlYccXNEyoV4Chi24CcycURCXEXbBuEXbeo4yv35d/euS8aSR0cUFnfVA2GE5X5Zsz/rG/AzFbUJlA3qf9DK28aIp5HBLwpvy/8B1PPSawSc9wjZVXpIj5kQTa0Q5lSaRGYsY= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1762374740; c=relaxed/simple; bh=BK4yD7eyeQ0mHbL7KbeZ8Mx12t+bQxDXJ6lt6IBpXBE=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=F388LORCc04P/wM2WCcqKJuOz+b4gO5Sy275UCg5xpkC9yS253R4Ujshif5V/uLDdu6Xim/edyo+2S6Mn/Xf0sj1rYzRiZ/Cai7cuBTvmjvtrzUpBXzRe+389XzrMbs+W+20XVve6Loq5ebZe1GkmGjc0Jt007l+9n1qarIPo5k= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=vAvkoYk2; 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="vAvkoYk2" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 7263BC116C6; Wed, 5 Nov 2025 20:32:20 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1762374740; bh=BK4yD7eyeQ0mHbL7KbeZ8Mx12t+bQxDXJ6lt6IBpXBE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=vAvkoYk2CcJVzgorkbzUvypit15MwLpUqJl/7tfiunIa12HGN5nZgFfkphZhk2KEu jfODpm1TqXr6qQzQ0AuTlMwkQ/uqj6GE7uXaoJvAjRWbbNzY45GHVkczETgoEbVdPV 1rucAZpM7ChQ6Wuo5gZBLApOaupy3wsh7yvylFbeFcTNnfN3co3HtEffizhBD3qcAt VEszxKC9IO1QKa51+tjuYUF2z89qyGbilox7Do0yjyR3F8bXjeisshIWj1bXXUvJL2 e26umtlPglL9G16iTKEo7nJBX2vpuGgaGvChJwZ94JXy19utTaxin9FqV0hLlNN5c2 ba2/5UlwhCnOA== Received: by paulmck-ThinkPad-P17-Gen-1.home (Postfix, from userid 1000) id A133ACE0F8F; Wed, 5 Nov 2025 12:32:18 -0800 (PST) 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" , Leon Hwang , Alexei Starovoitov Subject: [PATCH v2 11/16] rcu: Mark diagnostic functions as notrace Date: Wed, 5 Nov 2025 12:32:11 -0800 Message-Id: <20251105203216.2701005-11-paulmck@kernel.org> X-Mailer: git-send-email 2.40.1 In-Reply-To: References: 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 rcu_lockdep_current_cpu_online(), rcu_read_lock_sched_held(), rcu_read_lock_held(), rcu_read_lock_bh_held(), rcu_read_lock_any_held() are used by tracing-related code paths, so putting traces on them is unlikely to make anyone happy. This commit therefore marks them all "notrace". Reported-by: Leon Hwang Reported-by: Alexei Starovoitov Signed-off-by: Paul E. McKenney --- kernel/rcu/tree.c | 2 +- kernel/rcu/update.c | 8 ++++---- 2 files changed, 5 insertions(+), 5 deletions(-) diff --git a/kernel/rcu/tree.c b/kernel/rcu/tree.c index 31690ffa452a..8ddd07fed363 100644 --- a/kernel/rcu/tree.c +++ b/kernel/rcu/tree.c @@ -4021,7 +4021,7 @@ bool rcu_cpu_online(int cpu) * RCU on an offline processor during initial boot, hence the check for * rcu_scheduler_fully_active. */ -bool rcu_lockdep_current_cpu_online(void) +bool notrace rcu_lockdep_current_cpu_online(void) { struct rcu_data *rdp; bool ret =3D false; diff --git a/kernel/rcu/update.c b/kernel/rcu/update.c index c912b594ba98..dfeba9b35395 100644 --- a/kernel/rcu/update.c +++ b/kernel/rcu/update.c @@ -117,7 +117,7 @@ static bool rcu_read_lock_held_common(bool *ret) return false; } =20 -int rcu_read_lock_sched_held(void) +int notrace rcu_read_lock_sched_held(void) { bool ret; =20 @@ -342,7 +342,7 @@ EXPORT_SYMBOL_GPL(debug_lockdep_rcu_enabled); * Note that rcu_read_lock() is disallowed if the CPU is either idle or * offline from an RCU perspective, so check for those as well. */ -int rcu_read_lock_held(void) +int notrace rcu_read_lock_held(void) { bool ret; =20 @@ -367,7 +367,7 @@ EXPORT_SYMBOL_GPL(rcu_read_lock_held); * Note that rcu_read_lock_bh() is disallowed if the CPU is either idle or * offline from an RCU perspective, so check for those as well. */ -int rcu_read_lock_bh_held(void) +int notrace rcu_read_lock_bh_held(void) { bool ret; =20 @@ -377,7 +377,7 @@ int rcu_read_lock_bh_held(void) } EXPORT_SYMBOL_GPL(rcu_read_lock_bh_held); =20 -int rcu_read_lock_any_held(void) +int notrace rcu_read_lock_any_held(void) { bool ret; =20 --=20 2.40.1