From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752302AbeEOGas (ORCPT ); Tue, 15 May 2018 02:30:48 -0400 Received: from terminus.zytor.com ([198.137.202.136]:47651 "EHLO terminus.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752044AbeEOGar (ORCPT ); Tue, 15 May 2018 02:30:47 -0400 Date: Mon, 14 May 2018 23:30:12 -0700 From: tip-bot for Andrea Parri Message-ID: Cc: pbonzini@redhat.com, torvalds@linux-foundation.org, tglx@linutronix.de, paulmck@linux.vnet.ibm.com, akpm@linux-foundation.org, will.deacon@arm.com, stern@rowland.harvard.edu, hpa@zytor.com, linux-kernel@vger.kernel.org, andrea.parri@amarulasolutions.com, peterz@infradead.org, mingo@kernel.org Reply-To: hpa@zytor.com, stern@rowland.harvard.edu, pbonzini@redhat.com, torvalds@linux-foundation.org, tglx@linutronix.de, paulmck@linux.vnet.ibm.com, will.deacon@arm.com, akpm@linux-foundation.org, andrea.parri@amarulasolutions.com, mingo@kernel.org, peterz@infradead.org, linux-kernel@vger.kernel.org In-Reply-To: <1526340837-12222-7-git-send-email-paulmck@linux.vnet.ibm.com> References: <1526340837-12222-7-git-send-email-paulmck@linux.vnet.ibm.com> To: linux-tip-commits@vger.kernel.org Subject: [tip:locking/core] tools/memory-model: Model 'smp_store_mb()' Git-Commit-ID: bf8c6d963d16d40fbe70e94b61d9bf18c455fc6b X-Mailer: tip-git-log-daemon Robot-ID: Robot-Unsubscribe: Contact to get blacklisted from these emails MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain; charset=UTF-8 Content-Disposition: inline Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Commit-ID: bf8c6d963d16d40fbe70e94b61d9bf18c455fc6b Gitweb: https://git.kernel.org/tip/bf8c6d963d16d40fbe70e94b61d9bf18c455fc6b Author: Andrea Parri AuthorDate: Mon, 14 May 2018 16:33:45 -0700 Committer: Ingo Molnar CommitDate: Tue, 15 May 2018 08:11:16 +0200 tools/memory-model: Model 'smp_store_mb()' This commit models 'smp_store_mb(x, val);' to be semantically equivalent to 'WRITE_ONCE(x, val); smp_mb();'. Suggested-by: Paolo Bonzini Suggested-by: Peter Zijlstra Signed-off-by: Andrea Parri Signed-off-by: Paul E. McKenney Acked-by: Alan Stern Cc: Andrew Morton Cc: Linus Torvalds Cc: Thomas Gleixner Cc: Will Deacon Cc: akiyks@gmail.com Cc: boqun.feng@gmail.com Cc: dhowells@redhat.com Cc: j.alglave@ucl.ac.uk Cc: linux-arch@vger.kernel.org Cc: luc.maranget@inria.fr Cc: npiggin@gmail.com Cc: parri.andrea@gmail.com Link: http://lkml.kernel.org/r/1526340837-12222-7-git-send-email-paulmck@linux.vnet.ibm.com Signed-off-by: Ingo Molnar --- tools/memory-model/linux-kernel.def | 1 + 1 file changed, 1 insertion(+) diff --git a/tools/memory-model/linux-kernel.def b/tools/memory-model/linux-kernel.def index 397e4e67e8c8..acf86f6f360a 100644 --- a/tools/memory-model/linux-kernel.def +++ b/tools/memory-model/linux-kernel.def @@ -14,6 +14,7 @@ smp_store_release(X,V) { __store{release}(*X,V); } smp_load_acquire(X) __load{acquire}(*X) rcu_assign_pointer(X,V) { __store{release}(X,V); } rcu_dereference(X) __load{once}(X) +smp_store_mb(X,V) { __store{once}(X,V); __fence{mb}; } // Fences smp_mb() { __fence{mb} ; }