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=-16.8 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 71EC3C4338F for ; Wed, 18 Aug 2021 07:30:14 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 583526108B for ; Wed, 18 Aug 2021 07:30:14 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S239227AbhHRHar (ORCPT ); Wed, 18 Aug 2021 03:30:47 -0400 Received: from so254-9.mailgun.net ([198.61.254.9]:26013 "EHLO so254-9.mailgun.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S239181AbhHRHaI (ORCPT ); Wed, 18 Aug 2021 03:30:08 -0400 DKIM-Signature: a=rsa-sha256; v=1; c=relaxed/relaxed; d=mg.codeaurora.org; q=dns/txt; s=smtp; t=1629271774; h=References: In-Reply-To: Message-Id: Date: Subject: Cc: To: From: Sender; bh=ecbXpM7Xv2s+HA8vQcSNr4fgNRxFBHCCZBRsDf2Sjgc=; b=OqAlqp9bscLIeVBzsp9B/TcJPFzeWRhO5gGM5NtWhj/WPsOW/SdBSQoBGMtVVnbXQfnV3a+s a5cNQnu+bXtWOJKvf7Gl5yFEzplZ2LOxmfxmXgbWDGO4yEApY0kILY0zVpy+FpXpf0M4cHha FF61Hby7uazyGvDbvFefOCN27A8= X-Mailgun-Sending-Ip: 198.61.254.9 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-east-1.postgun.com with SMTP id 611cb6ca2892f803bc23b1d3 (version=TLS1.2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256); Wed, 18 Aug 2021 07:29:14 GMT Sender: neeraju=codeaurora.org@mg.codeaurora.org Received: by smtp.codeaurora.org (Postfix, from userid 1001) id 29771C43616; Wed, 18 Aug 2021 07:29:14 +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 8236EC4338F; Wed, 18 Aug 2021 07:29:12 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 smtp.codeaurora.org 8236EC4338F 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=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, boqun.feng@gmail.com, Neeraj Upadhyay Subject: [PATCH 4/5] rcu-tasks: Fix read-side primitives comment for call_rcu_tasks_trace Date: Wed, 18 Aug 2021 12:58:42 +0530 Message-Id: <1629271723-3816-5-git-send-email-neeraju@codeaurora.org> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1629271723-3816-1-git-send-email-neeraju@codeaurora.org> References: <1629271723-3816-1-git-send-email-neeraju@codeaurora.org> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org call_rcu_tasks_trace() does have read-side primitives - rcu_read_lock_trace() and rcu_read_unlock_trace(). Fix this information in the comments. Signed-off-by: Neeraj Upadhyay --- kernel/rcu/tasks.h | 10 +++------- 1 file changed, 3 insertions(+), 7 deletions(-) diff --git a/kernel/rcu/tasks.h b/kernel/rcu/tasks.h index 244e06a..5f9c14c 100644 --- a/kernel/rcu/tasks.h +++ b/kernel/rcu/tasks.h @@ -1214,13 +1214,9 @@ static void exit_tasks_rcu_finish_trace(struct task_struct *t) * * The callback function will be invoked some time after a full grace * period elapses, in other words after all currently executing RCU - * read-side critical sections have completed. call_rcu_tasks_trace() - * assumes that the read-side critical sections end at context switch, - * cond_resched_rcu_qs(), or transition to usermode execution. As such, - * there are no read-side primitives analogous to rcu_read_lock() and - * rcu_read_unlock() because this primitive is intended to determine - * that all tasks have passed through a safe state, not so much for - * data-structure synchronization. + * read-side critical sections have completed. These read-side + * critical sections are delimited by calls to rcu_read_lock_trace() + * and rcu_read_unlock_trace(). * * See the description of call_rcu() for more detailed information on * memory ordering guarantees. -- QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum, hosted by The Linux Foundation