From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ian Campbell Subject: [PATCH 07/10] xen: arm: Use dmb for smp barriers Date: Fri, 28 Jun 2013 17:10:53 +0100 Message-ID: <1372435856-14040-7-git-send-email-ian.campbell@citrix.com> References: <1372435809.8976.169.camel@zakaz.uk.xensource.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <1372435809.8976.169.camel@zakaz.uk.xensource.com> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xen.org Errors-To: xen-devel-bounces@lists.xen.org To: xen-devel@lists.xen.org Cc: julien.grall@citrix.com, tim@xen.org, Ian Campbell , stefano.stabellini@eu.citrix.com List-Id: xen-devel@lists.xenproject.org The full power of dsb is not required in this context. Also change wmb() to be dsb() directly instead of indirectly via mb(), for clarity. Signed-off-by: Ian Campbell --- xen/include/asm-arm/system.h | 8 ++++---- 1 files changed, 4 insertions(+), 4 deletions(-) diff --git a/xen/include/asm-arm/system.h b/xen/include/asm-arm/system.h index e003624..89c61ef 100644 --- a/xen/include/asm-arm/system.h +++ b/xen/include/asm-arm/system.h @@ -18,11 +18,11 @@ #define mb() dsb() #define rmb() dsb() -#define wmb() mb() +#define wmb() dsb() -#define smp_mb() mb() -#define smp_rmb() rmb() -#define smp_wmb() wmb() +#define smp_mb() dmb() +#define smp_rmb() dmb() +#define smp_wmb() dmb() #define xchg(ptr,x) \ ((__typeof__(*(ptr)))__xchg((unsigned long)(x),(ptr),sizeof(*(ptr)))) -- 1.7.2.5