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=-16.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,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 872D3C48BE5 for ; Tue, 22 Jun 2021 12:05:35 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 6FE66613C0 for ; Tue, 22 Jun 2021 12:05:35 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231276AbhFVMHu (ORCPT ); Tue, 22 Jun 2021 08:07:50 -0400 Received: from m43-7.mailgun.net ([69.72.43.7]:55098 "EHLO m43-7.mailgun.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231135AbhFVMHt (ORCPT ); Tue, 22 Jun 2021 08:07:49 -0400 DKIM-Signature: a=rsa-sha256; v=1; c=relaxed/relaxed; d=mg.codeaurora.org; q=dns/txt; s=smtp; t=1624363534; h=Message-Id: Date: Subject: Cc: To: From: Sender; bh=Tp8UH9h2iMsv9pkhjSI6gKRM13+oYh8zxCNpxDqjBd4=; b=Eu7yKYQZ0TjfX+YtaExfhwXZIqaQKHRPrClEmXCKeYEn+KOatwjcH6MQOypeWJNAh4epLPoW 4M/m5+rXaLhWtlL0oTUDfsPr4CgBXq9vlOb5c58ghxmfTbm/G6yuMLgwzWkljDYMl1ETKgwZ ZohQeMSQGIPQCOUO4YA1jMlMmmE= X-Mailgun-Sending-Ip: 69.72.43.7 X-Mailgun-Sid: WyJkZDlkNSIsICJyY3VAdmdlci5rZXJuZWwub3JnIiwgImJlOWU0YSJd Received: from smtp.codeaurora.org (ec2-35-166-182-171.us-west-2.compute.amazonaws.com [35.166.182.171]) by smtp-out-n06.prod.us-west-2.postgun.com with SMTP id 60d1d207bcc24d859be7add8 (version=TLS1.2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256); Tue, 22 Jun 2021 12:05:27 GMT Sender: neeraju=codeaurora.org@mg.codeaurora.org Received: by smtp.codeaurora.org (Postfix, from userid 1001) id E3C61C43144; Tue, 22 Jun 2021 12:05:26 +0000 (UTC) Received: from localhost (unknown [202.46.22.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: neeraju) by smtp.codeaurora.org (Postfix) with ESMTPSA id E5C31C433D3; Tue, 22 Jun 2021 12:05:24 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org E5C31C433D3 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=fail 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, urezki@gmail.com, frederic@kernel.org, Neeraj Upadhyay Subject: [PATCH] rcu: update: Check rcu_bh_lock_map state in rcu_read_lock_bh_held Date: Tue, 22 Jun 2021 17:35:21 +0530 Message-Id: <1624363521-19702-1-git-send-email-neeraju@codeaurora.org> X-Mailer: git-send-email 2.7.4 Precedence: bulk List-ID: X-Mailing-List: rcu@vger.kernel.org In addition to irq and softirq state, check rcu_bh_lock_map state, to decide whether RCU bh lock is held. Signed-off-by: Neeraj Upadhyay --- kernel/rcu/update.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/kernel/rcu/update.c b/kernel/rcu/update.c index c21b38c..d416f1c 100644 --- a/kernel/rcu/update.c +++ b/kernel/rcu/update.c @@ -333,7 +333,7 @@ int rcu_read_lock_bh_held(void) if (rcu_read_lock_held_common(&ret)) return ret; - return in_softirq() || irqs_disabled(); + return lock_is_held(&rcu_bh_lock_map) || in_softirq() || irqs_disabled(); } EXPORT_SYMBOL_GPL(rcu_read_lock_bh_held); -- QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum, hosted by The Linux Foundation