From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751863AbeAYXhH (ORCPT ); Thu, 25 Jan 2018 18:37:07 -0500 Received: from mx1.redhat.com ([209.132.183.28]:47106 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751774AbeAYXgp (ORCPT ); Thu, 25 Jan 2018 18:36:45 -0500 Date: Fri, 26 Jan 2018 01:36:44 +0200 From: "Michael S. Tsirkin" To: linux-kernel@vger.kernel.org Cc: netdev@vger.kernel.org, Jason Wang , John Fastabend , David Miller , virtualization@lists.linux-foundation.org Subject: [PATCH net-next 12/12] tools/virtio: fix smp_mb on x86 Message-ID: <1516923320-16959-16-git-send-email-mst@redhat.com> References: <1516923320-16959-1-git-send-email-mst@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1516923320-16959-1-git-send-email-mst@redhat.com> X-Mutt-Fcc: =sent Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Offset 128 overlaps the last word of the redzone. Use 132 which is always beyond that. Signed-off-by: Michael S. Tsirkin --- tools/virtio/ringtest/main.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/virtio/ringtest/main.h b/tools/virtio/ringtest/main.h index 593a328..301d59b 100644 --- a/tools/virtio/ringtest/main.h +++ b/tools/virtio/ringtest/main.h @@ -111,7 +111,7 @@ static inline void busy_wait(void) } #if defined(__x86_64__) || defined(__i386__) -#define smp_mb() asm volatile("lock; addl $0,-128(%%rsp)" ::: "memory", "cc") +#define smp_mb() asm volatile("lock; addl $0,-132(%%rsp)" ::: "memory", "cc") #else /* * Not using __ATOMIC_SEQ_CST since gcc docs say they are only synchronized -- MST