From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757984AbcBXFJf (ORCPT ); Wed, 24 Feb 2016 00:09:35 -0500 Received: from e19.ny.us.ibm.com ([129.33.205.209]:45424 "EHLO e19.ny.us.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757861AbcBXFHp (ORCPT ); Wed, 24 Feb 2016 00:07:45 -0500 X-IBM-Helo: d01dlp02.pok.ibm.com X-IBM-MailFrom: paulmck@linux.vnet.ibm.com X-IBM-RcptTo: linux-kernel@vger.kernel.org From: "Paul E. McKenney" To: linux-kernel@vger.kernel.org Cc: mingo@kernel.org, jiangshanlai@gmail.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, "Paul E. McKenney" Subject: [PATCH tip/core/rcu 11/14] documentation: Transitivity is not cumulativity Date: Tue, 23 Feb 2016 21:00:44 -0800 Message-Id: <1456290047-16654-11-git-send-email-paulmck@linux.vnet.ibm.com> X-Mailer: git-send-email 2.5.2 In-Reply-To: <20160224050021.GA14616@linux.vnet.ibm.com> References: <20160224050021.GA14616@linux.vnet.ibm.com> X-TM-AS-MML: disable X-Content-Scanned: Fidelis XPS MAILER x-cbid: 16022405-0057-0000-0000-00000383080F Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The "transitivity" section mentions cumulativity in a potentially confusing way. Contrary to the current wording, cumulativity is not transitivity, but rather a hardware discipline that can be used to implement transitivity on ARM and PowerPC CPUs. This commit therefore deletes the mention of cumulativity. Reported-by: Luc Maranget Signed-off-by: Paul E. McKenney --- Documentation/memory-barriers.txt | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/Documentation/memory-barriers.txt b/Documentation/memory-barriers.txt index 57e4a4b053c5..8367d393cba2 100644 --- a/Documentation/memory-barriers.txt +++ b/Documentation/memory-barriers.txt @@ -1270,7 +1270,7 @@ TRANSITIVITY Transitivity is a deeply intuitive notion about ordering that is not always provided by real computer systems. The following example -demonstrates transitivity (also called "cumulativity"): +demonstrates transitivity: CPU 1 CPU 2 CPU 3 ======================= ======================= ======================= -- 2.5.2