From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1759208AbcLSOg3 (ORCPT ); Mon, 19 Dec 2016 09:36:29 -0500 Received: from mail-pf0-f195.google.com ([209.85.192.195]:34526 "EHLO mail-pf0-f195.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758732AbcLSOg1 (ORCPT ); Mon, 19 Dec 2016 09:36:27 -0500 From: devendra sharma To: abbotti@mev.co.uk Cc: hsweeten@visionengravers.com, gregkh@linuxfoundation.org, devel@driverdev.osuosl.org, linux-kernel@vger.kernel.org, devendra sharma Subject: [PATCH] staging: comedi: dyna_pci10xx: fixed check patch warnings about memory barrier comments Date: Mon, 19 Dec 2016 20:06:15 +0530 Message-Id: <1482158175-3130-1-git-send-email-devendra.sharma9091@gmail.com> X-Mailer: git-send-email 2.7.4 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Added comments before memory barrier Signed-off-by: Devendra Sharma --- drivers/staging/comedi/drivers/dyna_pci10xx.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/staging/comedi/drivers/dyna_pci10xx.c b/drivers/staging/comedi/drivers/dyna_pci10xx.c index c9eb26f..c3b5236 100644 --- a/drivers/staging/comedi/drivers/dyna_pci10xx.c +++ b/drivers/staging/comedi/drivers/dyna_pci10xx.c @@ -122,6 +122,7 @@ static int dyna_pci10xx_insn_write_ao(struct comedi_device *dev, mutex_lock(&devpriv->mutex); for (n = 0; n < insn->n; n++) { + /*multi-processor memory barrier*/ smp_mb(); /* trigger conversion and write data */ outw_p(data[n], dev->iobase); @@ -141,6 +142,7 @@ static int dyna_pci10xx_di_insn_bits(struct comedi_device *dev, u16 d = 0; mutex_lock(&devpriv->mutex); + /*multi-processor memory barrier*/ smp_mb(); d = inw_p(devpriv->BADR3); udelay(10); @@ -161,6 +163,7 @@ static int dyna_pci10xx_do_insn_bits(struct comedi_device *dev, mutex_lock(&devpriv->mutex); if (comedi_dio_update_state(s, data)) { + /*multi-processor memory barrier*/ smp_mb(); outw_p(s->state, devpriv->BADR3); udelay(10); -- 2.7.4