From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Paul E. McKenney" Subject: [PATCH RFC LKMM 2/7] doc: Replace smp_cond_acquire() with smp_cond_load_acquire() Date: Wed, 29 Aug 2018 14:10:48 -0700 Message-ID: <20180829211053.20531-2-paulmck@linux.vnet.ibm.com> References: <20180829211018.GA19646@linux.vnet.ibm.com> Return-path: In-Reply-To: <20180829211018.GA19646@linux.vnet.ibm.com> Sender: linux-kernel-owner@vger.kernel.org To: linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org, mingo@kernel.org Cc: stern@rowland.harvard.edu, parri.andrea@gmail.com, will.deacon@arm.com, peterz@infradead.org, boqun.feng@gmail.com, npiggin@gmail.com, dhowells@redhat.com, j.alglave@ucl.ac.uk, luc.maranget@inria.fr, akiyks@gmail.com, Andrea Parri , "Paul E. McKenney" , Daniel Lustig , Jonathan Corbet List-Id: linux-arch.vger.kernel.org From: Andrea Parri Amend commit 1f03e8d2919270 ("locking/barriers: Replace smp_cond_acquire() with smp_cond_load_acquire()") by updating the documentation accordingly. Also remove some obsolete information related to the implementation. Signed-off-by: Andrea Parri Cc: Alan Stern Cc: Will Deacon Cc: Peter Zijlstra Cc: Boqun Feng Cc: Nicholas Piggin Cc: David Howells Cc: Jade Alglave Cc: Luc Maranget Cc: "Paul E. McKenney" Cc: Akira Yokosawa Cc: Daniel Lustig Cc: Jonathan Corbet Signed-off-by: Paul E. McKenney --- Documentation/memory-barriers.txt | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/Documentation/memory-barriers.txt b/Documentation/memory-barriers.txt index 0d8d7ef131e9..c1d913944ad8 100644 --- a/Documentation/memory-barriers.txt +++ b/Documentation/memory-barriers.txt @@ -471,8 +471,7 @@ And a couple of implicit varieties: operations after the ACQUIRE operation will appear to happen after the ACQUIRE operation with respect to the other components of the system. ACQUIRE operations include LOCK operations and both smp_load_acquire() - and smp_cond_acquire() operations. The later builds the necessary ACQUIRE - semantics from relying on a control dependency and smp_rmb(). + and smp_cond_load_acquire() operations. Memory operations that occur before an ACQUIRE operation may appear to happen after it completes. -- 2.17.1 From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mx0a-001b2d01.pphosted.com ([148.163.156.1]:34436 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729037AbeH3BJo (ORCPT ); Wed, 29 Aug 2018 21:09:44 -0400 Received: from pps.filterd (m0098410.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.22/8.16.0.22) with SMTP id w7TL8nIh001906 for ; Wed, 29 Aug 2018 17:11:03 -0400 Received: from e14.ny.us.ibm.com (e14.ny.us.ibm.com [129.33.205.204]) by mx0a-001b2d01.pphosted.com with ESMTP id 2m61x8av84-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for ; Wed, 29 Aug 2018 17:11:03 -0400 Received: from localhost by e14.ny.us.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Wed, 29 Aug 2018 17:11:01 -0400 From: "Paul E. McKenney" Subject: [PATCH RFC LKMM 2/7] doc: Replace smp_cond_acquire() with smp_cond_load_acquire() Date: Wed, 29 Aug 2018 14:10:48 -0700 In-Reply-To: <20180829211018.GA19646@linux.vnet.ibm.com> References: <20180829211018.GA19646@linux.vnet.ibm.com> Message-ID: <20180829211053.20531-2-paulmck@linux.vnet.ibm.com> Sender: linux-arch-owner@vger.kernel.org List-ID: To: linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org, mingo@kernel.org Cc: stern@rowland.harvard.edu, parri.andrea@gmail.com, will.deacon@arm.com, peterz@infradead.org, boqun.feng@gmail.com, npiggin@gmail.com, dhowells@redhat.com, j.alglave@ucl.ac.uk, luc.maranget@inria.fr, akiyks@gmail.com, Andrea Parri , "Paul E. McKenney" , Daniel Lustig , Jonathan Corbet Message-ID: <20180829211048.iVoD1wD6nidE41hHLoA2dES2kfKAF93UtBhoK65ruyo@z> From: Andrea Parri Amend commit 1f03e8d2919270 ("locking/barriers: Replace smp_cond_acquire() with smp_cond_load_acquire()") by updating the documentation accordingly. Also remove some obsolete information related to the implementation. Signed-off-by: Andrea Parri Cc: Alan Stern Cc: Will Deacon Cc: Peter Zijlstra Cc: Boqun Feng Cc: Nicholas Piggin Cc: David Howells Cc: Jade Alglave Cc: Luc Maranget Cc: "Paul E. McKenney" Cc: Akira Yokosawa Cc: Daniel Lustig Cc: Jonathan Corbet Signed-off-by: Paul E. McKenney --- Documentation/memory-barriers.txt | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/Documentation/memory-barriers.txt b/Documentation/memory-barriers.txt index 0d8d7ef131e9..c1d913944ad8 100644 --- a/Documentation/memory-barriers.txt +++ b/Documentation/memory-barriers.txt @@ -471,8 +471,7 @@ And a couple of implicit varieties: operations after the ACQUIRE operation will appear to happen after the ACQUIRE operation with respect to the other components of the system. ACQUIRE operations include LOCK operations and both smp_load_acquire() - and smp_cond_acquire() operations. The later builds the necessary ACQUIRE - semantics from relying on a control dependency and smp_rmb(). + and smp_cond_load_acquire() operations. Memory operations that occur before an ACQUIRE operation may appear to happen after it completes. -- 2.17.1