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=-9.5 required=3.0 tests=DKIM_ADSP_CUSTOM_MED, DKIM_SIGNED,DKIM_VALID,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, 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 1A489C33CB3 for ; Fri, 17 Jan 2020 13:37:48 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id E58F220728 for ; Fri, 17 Jan 2020 13:37:47 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="jS2H7Bgv"; dkim=fail reason="signature verification failed" (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="nyCDumfv" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org E58F220728 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=gmail.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:Message-Id:Date:Subject:To :From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References: List-Owner; bh=f72t1KaDsB5f+zgA/l7gGW2bm4jWFSXuK5xOH6UnK4E=; b=jS2H7BgvbGi4ze 7fS6ci4D0Hcn/6dbpzB66vxXLPJFQu86mKNlo3bBj3NKOiTiiaMZPcEl7zJc3YPPNm4IsHaY+koG1 16XmjdKKqA3ONRchwG2QS5Zg0RKs+chyoDndW8FA8i5LxcBuV+HeKhtOTw1HBhniJxt6NRMBph9tB 65Ilf6JSE8nPsde4wjUZs07OlbI7VxbPqUleZGvXnIP4Y2xIvaMcNsUJeWpfYTdx3BCupyTcRX4Tz UVKfTMehmaDY6VqY1kjQ+9lHqO5MtxJfzbSy8QSfq/YCFqGxDfXu18Umg/du1QcbCsZaO5WgmAtTF VI5yE/DroxRWc27Gm+6w==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1isRok-0005dw-Lt; Fri, 17 Jan 2020 13:37:42 +0000 Received: from mail-pl1-x641.google.com ([2607:f8b0:4864:20::641]) by bombadil.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1isRod-0005cq-MP for linux-arm-kernel@lists.infradead.org; Fri, 17 Jan 2020 13:37:41 +0000 Received: by mail-pl1-x641.google.com with SMTP id a6so9905036plm.3 for ; Fri, 17 Jan 2020 05:37:35 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=YHBJFZwYhK7Tmr8esHxqJUtoRn8WnZqTo+H+EnwYrJo=; b=nyCDumfvEcGI6zIFcDK5993aLcMZr2BSrphFpVcsIQuJdGZXvAjSxzqH+3c5I9Paf5 AXRmanS3PLoIGFPLvxYipMqaTeiAD2kEWff4ROiwS4h0BEJd116OLwyHSiYcRxjm5iHB 5qhIrMXvU0e+VyL0sw+9be4Jx0S6pXmg+kCSt9gDaNyoeFxk/Ph6os7uImlW3gbsAj0g DSlOUoP2+jyIkbnHe7USSl7SA/EgB4ObNw0G1wIcgPAXfUxelXegmmO/IDwMKirYFM5h /biIw7TgNJY/5OS6wogEgiDzzd/T16483kcJttOHMzl/0UzUU1J1odaLt0KmFfHrldT9 Rpsw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=YHBJFZwYhK7Tmr8esHxqJUtoRn8WnZqTo+H+EnwYrJo=; b=Okgb35NgZBkgOGB1ZCE/gTWukxcw8EXj7bkKy2jJWifeJAJNsmnRB0G42fLX5VD1EK O9O7E+6Z5A4l8EPWvyojsfAN1J9PBCHLXRTpYp8ZbNXzRrh0gs/HQ2Yz7htFzzR72TWA inAWiA+6n02ojSsRlX6iiBVjUT8aMNqC9Iq4Vd95ri6xefCfeI9LA0EaH5b5eecImU1c z3BrZViaUES9t98U4ag8OOlkygnVKK9PEgFgXIBVogOxXecaRXHcYpkEoS7C39YaWJZr 85qDPPStjoIJHFCzaDM1p7dQpEhAqYHxpwZPcxJ/fGsrNee/q8s+JI0psibfEQT8KVCy zCuA== X-Gm-Message-State: APjAAAUXqB6RBR7whYTB6vvNkvw/RqifUVN0p3ks06xwTxV3oNy4dkmb 3Jx9Cnuy0fmY4txgLr5qtLE= X-Google-Smtp-Source: APXvYqw8EPpDPsWKBxlJK9XKZQjLvJ/SuPz8bvOZHAxShVJvBgezCmAcl0rhxK02SG64hvN+9RT1fQ== X-Received: by 2002:a17:90b:4004:: with SMTP id ie4mr5679480pjb.49.1579268254980; Fri, 17 Jan 2020 05:37:34 -0800 (PST) Received: from localhost.localdomain ([103.211.17.168]) by smtp.googlemail.com with ESMTPSA id e15sm3229519pja.13.2020.01.17.05.37.32 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 17 Jan 2020 05:37:34 -0800 (PST) From: Amol Grover To: Santosh Shilimkar Subject: [PATCH v2] drivers: soc: ti: knav_qmss_queue: Pass lockdep expression to RCU lists Date: Fri, 17 Jan 2020 19:00:49 +0530 Message-Id: <20200117133048.31708-1-frextrite@gmail.com> X-Mailer: git-send-email 2.24.1 MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200117_053735_730392_4ABA0BD0 X-CRM114-Status: GOOD ( 10.57 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: "Paul E . McKenney" , Amol Grover , linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Joel Fernandes , linux-kernel-mentees@lists.linuxfoundation.org, Madhuparna Bhowmik Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org inst->handles is traversed using list_for_each_entry_rcu outside an RCU read-side critical section but under the protection of knav_dev_lock. Hence, add corresponding lockdep expression to silence false-positive lockdep warnings, and harden RCU lists. Add macro for the corresponding lockdep expression. Signed-off-by: Amol Grover --- v2: - Remove rcu_read_lock_held() from lockdep expression since it is implicitly checked for. drivers/soc/ti/knav_qmss_queue.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/drivers/soc/ti/knav_qmss_queue.c b/drivers/soc/ti/knav_qmss_queue.c index 1ccc9064e1eb..37f3db6c041c 100644 --- a/drivers/soc/ti/knav_qmss_queue.c +++ b/drivers/soc/ti/knav_qmss_queue.c @@ -25,6 +25,8 @@ static struct knav_device *kdev; static DEFINE_MUTEX(knav_dev_lock); +#define knav_dev_lock_held() \ + lockdep_is_held(&knav_dev_lock) /* Queue manager register indices in DTS */ #define KNAV_QUEUE_PEEK_REG_INDEX 0 @@ -52,8 +54,9 @@ static DEFINE_MUTEX(knav_dev_lock); #define knav_queue_idx_to_inst(kdev, idx) \ (kdev->instances + (idx << kdev->inst_shift)) -#define for_each_handle_rcu(qh, inst) \ - list_for_each_entry_rcu(qh, &inst->handles, list) +#define for_each_handle_rcu(qh, inst) \ + list_for_each_entry_rcu(qh, &inst->handles, list, \ + knav_dev_lock_held()) #define for_each_instance(idx, inst, kdev) \ for (idx = 0, inst = kdev->instances; \ -- 2.24.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel