From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from e34.co.us.ibm.com (e34.co.us.ibm.com [32.97.110.152]) (using TLSv1 with cipher CAMELLIA256-SHA (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 3F5181A1700 for ; Wed, 27 Jan 2016 08:59:56 +1100 (AEDT) Received: from localhost by e34.co.us.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Tue, 26 Jan 2016 14:59:54 -0700 Received: from b03cxnp07028.gho.boulder.ibm.com (b03cxnp07028.gho.boulder.ibm.com [9.17.130.15]) by d03dlp02.boulder.ibm.com (Postfix) with ESMTP id B1CFA3E40041 for ; Tue, 26 Jan 2016 14:59:51 -0700 (MST) Received: from d03av05.boulder.ibm.com (d03av05.boulder.ibm.com [9.17.195.85]) by b03cxnp07028.gho.boulder.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id u0QLxpu527656272 for ; Tue, 26 Jan 2016 14:59:51 -0700 Received: from d03av05.boulder.ibm.com (localhost [127.0.0.1]) by d03av05.boulder.ibm.com (8.14.4/8.14.4/NCO v10.0 AVout) with ESMTP id u0QLxXa0008480 for ; Tue, 26 Jan 2016 14:59:50 -0700 Date: Tue, 26 Jan 2016 12:11:43 -0800 From: "Paul E. McKenney" To: Will Deacon Cc: Peter Zijlstra , Leonid Yegoshin , "Michael S. Tsirkin" , linux-kernel@vger.kernel.org, Arnd Bergmann , linux-arch@vger.kernel.org, Andrew Cooper , Russell King - ARM Linux , virtualization@lists.linux-foundation.org, Stefano Stabellini , Thomas Gleixner , Ingo Molnar , "H. Peter Anvin" , Joe Perches , David Miller , linux-ia64@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-s390@vger.kernel.org, sparclinux@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-metag@vger.kernel.org, linux-mips@linux-mips.org, x86@kernel.org, user-mode-linux-devel@lists.sourceforge.net, adi-buildroot-devel@lists.sourceforge.net, linux-sh@vger.kernel.org, linux-xtensa@linux-xtensa.org, xen-devel@lists.xenproject.org, Ralf Baechle , Ingo Molnar , ddaney.cavm@gmail.com, james.hogan@imgtec.com, Michael Ellerman Subject: Re: [v3,11/41] mips: reuse asm-generic/barrier.h Message-ID: <20160126201143.GV4503@linux.vnet.ibm.com> Reply-To: paulmck@linux.vnet.ibm.com References: <20160113204844.GV6357@twins.programming.kicks-ass.net> <5696BA6E.4070508@imgtec.com> <20160114120445.GB15828@arm.com> <56980145.5030901@imgtec.com> <20160114204827.GE3818@linux.vnet.ibm.com> <56981212.7050301@imgtec.com> <20160114222046.GH3818@linux.vnet.ibm.com> <20160126102402.GE6357@twins.programming.kicks-ass.net> <20160126103200.GI6375@twins.programming.kicks-ass.net> <20160126110053.GA21553@arm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii In-Reply-To: <20160126110053.GA21553@arm.com> List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , On Tue, Jan 26, 2016 at 11:09:27AM +0000, Will Deacon wrote: > On Tue, Jan 26, 2016 at 11:32:00AM +0100, Peter Zijlstra wrote: > > On Tue, Jan 26, 2016 at 11:24:02AM +0100, Peter Zijlstra wrote: > > > > > Yeah, this goes under the header: memory-barriers.txt is _NOT_ a > > > specification (I seem to keep repeating this). > > > > Do we want this ? Seems likely to me. ;-) > > --- > > Documentation/memory-barriers.txt | 17 +++++++++++++++++ > > 1 file changed, 17 insertions(+) > > > > diff --git a/Documentation/memory-barriers.txt b/Documentation/memory-barriers.txt > > index a61be39c7b51..433326ebdc26 100644 > > --- a/Documentation/memory-barriers.txt > > +++ b/Documentation/memory-barriers.txt > > @@ -1,3 +1,4 @@ > > + > > ============================ > > LINUX KERNEL MEMORY BARRIERS > > ============================ > > @@ -5,6 +6,22 @@ > > By: David Howells > > Paul E. McKenney > > > > +========== > > +DISCLAIMER > > +========== > > + > > +This document is not a specification; it is intentionally (for the sake of > > +brevity) and unintentionally (due to being human) incomplete. This document is > > +meant as a guide to using the various memory barriers provided by Linux, but > > +in case of any doubt (and there are many) please ask. > > It might be worth adding you and me to the top of the file, to save Paul > Cc'ing us on questions (get_maintainer.pl points at poor old Corbet for > this file). > > But yes, it seems that something like this is required. So Peter, would you like to update your patch to include yourself and Will as authors? Thanx, Paul