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=-9.8 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham 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 63C8FC433DF for ; Mon, 22 Jun 2020 18:07:25 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 3E93220656 for ; Mon, 22 Jun 2020 18:07:25 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=mg.codeaurora.org header.i=@mg.codeaurora.org header.b="OhjlVEmB" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730244AbgFVSHY (ORCPT ); Mon, 22 Jun 2020 14:07:24 -0400 Received: from m43-7.mailgun.net ([69.72.43.7]:26432 "EHLO m43-7.mailgun.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730046AbgFVSHX (ORCPT ); Mon, 22 Jun 2020 14:07:23 -0400 DKIM-Signature: a=rsa-sha256; v=1; c=relaxed/relaxed; d=mg.codeaurora.org; q=dns/txt; s=smtp; t=1592849242; h=Message-Id: Date: Subject: Cc: To: From: Sender; bh=DpNd2zXh5ar+PR5dcDtX1KuMP2pD3jdm3Qo6Wkx+K3M=; b=OhjlVEmBvMHdrUu7xMyA7S936CX10oD6wfQonJpfZgHOjCC6N6VDjDhIZ5veP99BqT2cj1+v Vb61PII97Gyn5tNt89ZJ6RY2Fyhf+HSgxeTNf5+HkuT91vMfKcYUQml9Dg+XHao/wk+lx/0h hpXdRcBlqS8YkDdz2klw5X+0oYo= X-Mailgun-Sending-Ip: 69.72.43.7 X-Mailgun-Sid: WyI0MWYwYSIsICJsaW51eC1rZXJuZWxAdmdlci5rZXJuZWwub3JnIiwgImJlOWU0YSJd Received: from smtp.codeaurora.org (ec2-35-166-182-171.us-west-2.compute.amazonaws.com [35.166.182.171]) by smtp-out-n04.prod.us-west-2.postgun.com with SMTP id 5ef0f34dfe1db4db897ebb78 (version=TLS1.2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256); Mon, 22 Jun 2020 18:07:09 GMT Received: by smtp.codeaurora.org (Postfix, from userid 1001) id 31B07C43395; Mon, 22 Jun 2020 18:07:09 +0000 (UTC) Received: from localhost (blr-c-bdr-fw-01_GlobalNAT_AllZones-Outside.qualcomm.com [103.229.19.19]) (using TLSv1.2 with cipher DHE-RSA-AES128-SHA (128/128 bits)) (No client certificate requested) (Authenticated sender: neeraju) by smtp.codeaurora.org (Postfix) with ESMTPSA id C2FC5C433C8; Mon, 22 Jun 2020 18:07:07 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org C2FC5C433C8 Authentication-Results: aws-us-west-2-caf-mail-1.web.codeaurora.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: aws-us-west-2-caf-mail-1.web.codeaurora.org; spf=none smtp.mailfrom=neeraju@codeaurora.org From: Neeraj Upadhyay To: paulmck@kernel.org, josh@joshtriplett.org, rostedt@goodmis.org, mathieu.desnoyers@efficios.com, jiangshanlai@gmail.com, joel@joelfernandes.org Cc: rcu@vger.kernel.org, linux-kernel@vger.kernel.org, Neeraj Upadhyay Subject: [PATCH] rcu/tree: Remove CONFIG_PREMPT_RCU check in force_qs_rnp Date: Mon, 22 Jun 2020 23:37:03 +0530 Message-Id: <1592849223-17774-1-git-send-email-neeraju@codeaurora.org> X-Mailer: git-send-email 1.9.1 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Remove CONFIG_PREMPT_RCU check in force_qs_rnp(). Originally, this check was required to skip executing fqs failsafe for rcu-sched, which was added in commit a77da14ce9af ("rcu: Yet another fix for preemption and CPU hotplug"). However, this failsafe has been removed, since then. So, cleanup the code to avoid any confusion around the need for boosting, for !CONFIG_PREMPT_RCU. Signed-off-by: Neeraj Upadhyay --- kernel/rcu/tree.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/kernel/rcu/tree.c b/kernel/rcu/tree.c index 6226bfb..57c904b 100644 --- a/kernel/rcu/tree.c +++ b/kernel/rcu/tree.c @@ -2514,8 +2514,7 @@ static void force_qs_rnp(int (*f)(struct rcu_data *rdp)) raw_spin_lock_irqsave_rcu_node(rnp, flags); rcu_state.cbovldnext |= !!rnp->cbovldmask; if (rnp->qsmask == 0) { - if (!IS_ENABLED(CONFIG_PREEMPT_RCU) || - rcu_preempt_blocked_readers_cgp(rnp)) { + if (rcu_preempt_blocked_readers_cgp(rnp)) { /* * No point in scanning bits because they * are all zero. But we might need to -- The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum, a Linux Foundation Collaborative Project