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Message-Id: <1466453164-13185-11-git-send-email-dave@stgolabs.net>
Date: Mon, 20 Jun 2016 13:06:02 -0700
From: Davidlohr Bueso <dave@...olabs.net>
To: peterz@...radead.org, mingo@...nel.org
Cc: davem@...emloft.net, cw00.choi@...sung.com,
dougthompson@...ssion.com, bp@...en8.de, mchehab@....samsung.com,
gregkh@...uxfoundation.org, pfg@....com, jikos@...nel.org,
hans.verkuil@...co.com, awalls@...metrocast.net,
dledford@...hat.com, sean.hefty@...el.com, kys@...rosoft.com,
heiko.carstens@...ibm.com, James.Bottomley@...senPartnership.com,
sumit.semwal@...aro.org, schwidefsky@...ibm.com,
linux-kernel@...r.kernel.org, dave@...olabs.net,
Davidlohr Bueso <dbueso@...e.de>
Subject: [PATCH 10/12] s390/scm_block: Employ atomic_fetch_inc()
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 <schwidefsky@...ibm.com>
Cc: Heiko Carstens <heiko.carstens@...ibm.com>
Signed-off-by: Davidlohr Bueso <dbueso@...e.de>
---
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
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