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 X-Spam-Level: X-Spam-Status: No, score=-13.1 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 881D1C433E6 for ; Mon, 31 Aug 2020 18:08:22 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 5E5612083E for ; Mon, 31 Aug 2020 18:08:22 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1598897302; bh=O68wm3njlg+8X7DYUq157S0m3ytqa94CGoqfH9FWrWU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=IvOp06V8O4fOmSIj7bVdGXJ3XBrugPVio+76fTj6Zmb6Nt8t1byAhQP6Sw6VRQ7gu UekD/0YuOSDp+v2Mj8+2d5bsKuLl3OfEhP5q2ThoUxwPOUkd7XQ7e/AsU6A3PaiMzz /wlL01uhtliL1OvJ8KtiQjgPYElK0WSUq7oFQ1Cs= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729142AbgHaSIU (ORCPT ); Mon, 31 Aug 2020 14:08:20 -0400 Received: from mail.kernel.org ([198.145.29.99]:56020 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729305AbgHaSH6 (ORCPT ); Mon, 31 Aug 2020 14:07:58 -0400 Received: from paulmck-ThinkPad-P72.home (unknown [50.45.173.55]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 52F2B21707; Mon, 31 Aug 2020 18:07:55 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1598897275; bh=O68wm3njlg+8X7DYUq157S0m3ytqa94CGoqfH9FWrWU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=dH3R9vvPgpi2t84qI1DrwIBT5r73lMnlz38DN9bCR+yKcIs2YvBRlHQsJ6PWFGK+0 mVPI17TRlpJomf4Ss7ju9YQm11rNWp/B3wXLyvp17Wu9Gp8+OOkv/rskRoQnwnBQMk Yw68vyDngn6oNjggP0CCA9D05cEWHQa1WGj7QsPo= From: paulmck@kernel.org To: rcu@vger.kernel.org Cc: linux-kernel@vger.kernel.org, kernel-team@fb.com, mingo@kernel.org, jiangshanlai@gmail.com, dipankar@in.ibm.com, akpm@linux-foundation.org, mathieu.desnoyers@efficios.com, josh@joshtriplett.org, tglx@linutronix.de, peterz@infradead.org, rostedt@goodmis.org, dhowells@redhat.com, edumazet@google.com, fweisbec@gmail.com, oleg@redhat.com, joel@joelfernandes.org, "Paul E. McKenney" Subject: [PATCH tip/core/rcu 17/19] scftorture: Adapt memory-ordering test to UP operation Date: Mon, 31 Aug 2020 11:07:47 -0700 Message-Id: <20200831180749.843-17-paulmck@kernel.org> X-Mailer: git-send-email 2.9.5 In-Reply-To: <20200831180731.GA582@paulmck-ThinkPad-P72> References: <20200831180731.GA582@paulmck-ThinkPad-P72> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: "Paul E. McKenney" On uniprocessor systems, smp_call_function() does nothing. This commit therefore avoids complaining about the lack of handler accesses in the single-CPU case where there is no handler. Signed-off-by: Paul E. McKenney --- kernel/scftorture.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/kernel/scftorture.c b/kernel/scftorture.c index 04d3a42..fc22bcc 100644 --- a/kernel/scftorture.c +++ b/kernel/scftorture.c @@ -363,7 +363,8 @@ static void scftorture_invoke_one(struct scf_statistics *scfp, struct torture_ra scfcp->scfc_out = true; } if (scfcp && scfsp->scfs_wait) { - if (WARN_ON_ONCE(!scfcp->scfc_out)) + if (WARN_ON_ONCE((num_online_cpus() > 1 || scfsp->scfs_prim == SCF_PRIM_SINGLE) && + !scfcp->scfc_out)) atomic_inc(&n_mb_out_errs); // Leak rather than trash! else kfree(scfcp); -- 2.9.5