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=-3.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS,USER_AGENT_NEOMUTT 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 99DB1ECDE47 for ; Thu, 8 Nov 2018 16:03:00 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 6B93F2077B for ; Thu, 8 Nov 2018 16:03:00 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 6B93F2077B Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=linutronix.de Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727327AbeKIBjH (ORCPT ); Thu, 8 Nov 2018 20:39:07 -0500 Received: from Galois.linutronix.de ([146.0.238.70]:44569 "EHLO Galois.linutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726584AbeKIBjH (ORCPT ); Thu, 8 Nov 2018 20:39:07 -0500 Received: from bigeasy by Galois.linutronix.de with local (Exim 4.80) (envelope-from ) id 1gKmll-0003Mj-53; Thu, 08 Nov 2018 17:02:57 +0100 Date: Thu, 8 Nov 2018 17:02:57 +0100 From: Sebastian Andrzej Siewior To: "Paul E. McKenney" Cc: tglx@linutronix.de, linux-rt-users@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: rcu: Merge RCU-bh into RCU-preempt Message-ID: <20181108160256.xpawe65h5lm65soi@linutronix.de> References: <20181101231804.GA11280@linux.ibm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <20181101231804.GA11280@linux.ibm.com> User-Agent: NeoMutt/20180716 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 2018-11-01 16:18:04 [-0700], Paul E. McKenney wrote: > The need for this goes away as of the current merge window because > RCU-bh has gone away. (Aside from still being able to do things > like rcu_read_lock_bh() as a documentation device.) So in -RT rcu_read_lock_bh() does { local_bh_disable() ; rcu_read_lock() } So you are saying that this is also the case in v4.20? > Thanx, Paul > Sebastian