linux-kernel - [PATCH 06/12] HID,wacom: Employ atomic_fetch

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Date:	Mon, 20 Jun 2016 13:05:58 -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 06/12] HID,wacom: 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: Jiri Kosina <jikos@...nel.org>
Signed-off-by: Davidlohr Bueso <dbueso@...e.de>
---
 drivers/hid/wacom_sys.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/hid/wacom_sys.c b/drivers/hid/wacom_sys.c
index 499cc8213cfe..88bde7687edd 100644
--- a/drivers/hid/wacom_sys.c
+++ b/drivers/hid/wacom_sys.c
@@ -1088,7 +1088,7 @@ static int wacom_initialize_battery(struct wacom *wacom)
 	if (wacom->wacom_wac.features.quirks & WACOM_QUIRK_BATTERY) {
 		struct power_supply_desc *bat_desc = &wacom->battery_desc;
 		struct power_supply_desc *ac_desc = &wacom->ac_desc;
-		n = atomic_inc_return(&battery_no) - 1;
+		n = atomic_fetch_inc(&battery_no);
 
 		bat_desc->properties = wacom_battery_props;
 		bat_desc->num_properties = ARRAY_SIZE(wacom_battery_props);
-- 
2.6.6