From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754314AbbELVsB (ORCPT ); Tue, 12 May 2015 17:48:01 -0400 Received: from e35.co.us.ibm.com ([32.97.110.153]:39873 "EHLO e35.co.us.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754029AbbELVp6 (ORCPT ); Tue, 12 May 2015 17:45:58 -0400 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, "Paul E. McKenney" , Subject: [PATCH tip/core/rcu 09/15] powerpc: Fix smp_mb__before_spinlock() Date: Tue, 12 May 2015 14:38:15 -0700 Message-Id: <1431466701-653-9-git-send-email-paulmck@linux.vnet.ibm.com> X-Mailer: git-send-email 1.8.1.5 In-Reply-To: <1431466701-653-1-git-send-email-paulmck@linux.vnet.ibm.com> References: <20150512213756.GA32729@linux.vnet.ibm.com> <1431466701-653-1-git-send-email-paulmck@linux.vnet.ibm.com> X-TM-AS-MML: disable X-Content-Scanned: Fidelis XPS MAILER x-cbid: 15051221-0013-0000-0000-00000AB3DD4A Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: "Paul E. McKenney" Currently, smp_mb__before_spinlock() is defined to be smp_wmb() in core code, but this is not sufficient on PowerPC. This patch therefore supplies an override for the generic definition to strengthen smp_mb__before_spinlock() to smp_mb(), as is needed on PowerPC. Signed-off-by: Paul E. McKenney Cc: --- arch/powerpc/include/asm/barrier.h | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/powerpc/include/asm/barrier.h b/arch/powerpc/include/asm/barrier.h index a3bf5be111ff..1124f59b8df4 100644 --- a/arch/powerpc/include/asm/barrier.h +++ b/arch/powerpc/include/asm/barrier.h @@ -89,5 +89,6 @@ do { \ #define smp_mb__before_atomic() smp_mb() #define smp_mb__after_atomic() smp_mb() +#define smp_mb__before_spinlock() smp_mb() #endif /* _ASM_POWERPC_BARRIER_H */ -- 1.8.1.5