From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933715AbbELVa5 (ORCPT ); Tue, 12 May 2015 17:30:57 -0400 Received: from e39.co.us.ibm.com ([32.97.110.160]:37813 "EHLO e39.co.us.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751263AbbELVaz (ORCPT ); Tue, 12 May 2015 17:30:55 -0400 Date: Tue, 12 May 2015 14:22:34 -0700 From: "Paul E. McKenney" To: linux-kernel@vger.kernel.org Cc: mingo@kernel.org, laijs@cn.fujitsu.com, dipankar@in.ibm.com, akpm@linux-foundation.org, mathieu.desnoyers@efficios.com, josh@joshtriplett.org, tglx@linutronix.de, peterz@infradead.org, rostedt@goodmis.org, dhowells@redhat.com, edumazet@google.com, dvhart@linux.intel.com, fweisbec@gmail.com, oleg@redhat.com, bobby.prani@gmail.com Subject: [PATCH tip/core/rcu 0/3] Documentation updates for 4.2 Message-ID: <20150512212234.GA32351@linux.vnet.ibm.com> Reply-To: paulmck@linux.vnet.ibm.com MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.5.21 (2010-09-15) X-TM-AS-MML: disable X-Content-Scanned: Fidelis XPS MAILER x-cbid: 15051221-0033-0000-0000-0000047DA0D7 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello! This series provides a few documentation updates: 1. Fix description of smp_mb__before_spinlock() semantics, courtesy of Will Deacon. 2. Add another caveat to the list regarding the care and feeding of pointers returned by rcu_derefence(). You cannot let the compiler know too much. 3. Explicitly state that each instance of rcu_dereference() will reload the pointer, courtesy of Milos Vyletel. Thanx, Paul ------------------------------------------------------------------------ b/Documentation/RCU/rcu_dereference.txt | 5 +++++ b/Documentation/RCU/whatisRCU.txt | 4 +++- b/Documentation/memory-barriers.txt | 7 +++---- b/include/linux/spinlock.h | 2 +- 4 files changed, 12 insertions(+), 6 deletions(-)