From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755408AbcFTUJH (ORCPT ); Mon, 20 Jun 2016 16:09:07 -0400 Received: from smtp2.provo.novell.com ([137.65.250.81]:41952 "EHLO smtp2.provo.novell.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755329AbcFTUIc (ORCPT ); Mon, 20 Jun 2016 16:08:32 -0400 From: Davidlohr Bueso To: peterz@infradead.org, mingo@kernel.org Cc: davem@davemloft.net, cw00.choi@samsung.com, dougthompson@xmission.com, bp@alien8.de, mchehab@osg.samsung.com, gregkh@linuxfoundation.org, pfg@sgi.com, jikos@kernel.org, hans.verkuil@cisco.com, awalls@md.metrocast.net, dledford@redhat.com, sean.hefty@intel.com, kys@microsoft.com, heiko.carstens@de.ibm.com, James.Bottomley@HansenPartnership.com, sumit.semwal@linaro.org, schwidefsky@de.ibm.com, linux-kernel@vger.kernel.org, dave@stgolabs.net, Davidlohr Bueso Subject: [PATCH 10/12] s390/scm_block: Employ atomic_fetch_inc() Date: Mon, 20 Jun 2016 13:06:02 -0700 Message-Id: <1466453164-13185-11-git-send-email-dave@stgolabs.net> X-Mailer: git-send-email 2.6.6 In-Reply-To: <1466453164-13185-1-git-send-email-dave@stgolabs.net> References: <1466453164-13185-1-git-send-email-dave@stgolabs.net> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Now that we have fetch_inc() we can stop using inc_return() - 1. These are very similar to the existing OP-RETURN primitives we already have, except they return the value of the atomic variable _before_ modification. Cc: Martin Schwidefsky Cc: Heiko Carstens Signed-off-by: Davidlohr Bueso --- drivers/s390/block/scm_blk.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/s390/block/scm_blk.c b/drivers/s390/block/scm_blk.c index e6f54d3b8969..eef68990474a 100644 --- a/drivers/s390/block/scm_blk.c +++ b/drivers/s390/block/scm_blk.c @@ -475,7 +475,7 @@ int scm_blk_dev_setup(struct scm_blk_dev *bdev, struct scm_device *scmdev) int len, ret = -ENOMEM; unsigned int devindex, nr_max_blk; - devindex = atomic_inc_return(&nr_devices) - 1; + devindex = atomic_fetch_inc(&nr_devices); /* scma..scmz + scmaa..scmzz */ if (devindex > 701) { ret = -ENODEV; -- 2.6.6