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 04BEC2874FF; Mon, 29 Dec 2025 19:14:00 +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=1767035640; cv=none; b=WwzX0vktYqf3uvRM8LdZR6R9XqRCFYKQjV+AbZW5bu0Vpx5sh4Y24KB/ajlosBHpu3rPCaMFUU+apbx9brtrHCYvT1mtM/c2eIpXuF+ZC4oBAKHKbc2//7/5pd0shtyvWrKutozII7xtL1JDFOmK0cr/LESeIuLWR+AeWag3D3s= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1767035640; c=relaxed/simple; bh=HgAwY3wlHrQUmWmjO4oRSPl4cMdqBMH6VaPUV/rKWFw=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=HHdQuOcAO4ZE+iaTHJuX8Y1A0oo5PeABNTS7mazS/LbD90Z4lr4aue6bk6U9SvK++E1LWGLGNQLa1VfRlvBL2L0R2Lwvbg/fhV+lhUBmRkH2G+waebhpN/zN1HYV+k2vGvrL4yjOYOlvPzCDPd3uZfRA13N81sDuxeM1l6N9afs= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=ZAnyumhC; 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="ZAnyumhC" Received: by smtp.kernel.org (Postfix) with ESMTPSA id D8277C4CEF7; Mon, 29 Dec 2025 19:13:59 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1767035639; bh=HgAwY3wlHrQUmWmjO4oRSPl4cMdqBMH6VaPUV/rKWFw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=ZAnyumhCl6LmFXWkilZ8TMBQHPdvpvZy82Xv/+KEAuRUgUA8ZbWox+F0h/2PbaxzM lDOKl0Xz+Ir/hNWAP+lzzIa3wFoqxR8x2vwwj9DqS1t9j0xoAm/jwuo7q7CdIbikp3 zWrA4/B3LUUnVUd5GWGb6XmSl2FjHTuefXn7BjOjImDFfVXEApjdCOAJfzd70UYoXL mttCLkPMoQ70tl7bWb+nbJiw5BtCr8HtzkDdxV+LPhzr1hVQhezkCmChCHJTJI12iL mxo4MbT8oe65V5OL7wd/RQQJesPJdT5stK1vkeHTqYmgS7rTCjsAfdTL6PQqBAEEhK HvRtC9yEpzOkw== Received: by paulmck-ThinkPad-P17-Gen-1.home (Postfix, from userid 1000) id 8C665CE0C97; Mon, 29 Dec 2025 11:13:59 -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" Subject: [PATCH v4 1/6] rcutorture: Add context checks to rcu_torture_timer() Date: Mon, 29 Dec 2025 11:13:53 -0800 Message-Id: <20251229191358.693753-1-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: 8bit This commit adds irq, NMI, and softirq context checks to the rcu_torture_timer() function. Just because you are paranoid does not mean that they are not out to get you... ;-) Signed-off-by: Paul E. McKenney --- kernel/rcu/rcutorture.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/kernel/rcu/rcutorture.c b/kernel/rcu/rcutorture.c index d00b043823aef..63053031ade21 100644 --- a/kernel/rcu/rcutorture.c +++ b/kernel/rcu/rcutorture.c @@ -2454,6 +2454,9 @@ static DEFINE_TORTURE_RANDOM_PERCPU(rcu_torture_timer_rand); */ static void rcu_torture_timer(struct timer_list *unused) { + WARN_ON_ONCE(!in_serving_softirq()); + WARN_ON_ONCE(in_hardirq()); + WARN_ON_ONCE(in_nmi()); atomic_long_inc(&n_rcu_torture_timers); (void)rcu_torture_one_read(this_cpu_ptr(&rcu_torture_timer_rand), -1); -- 2.40.1