linux-kernel - [PATCH 16/66] hwmon: (core) use permission-specific DEVICE

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Message-Id: <1482408335-3435-17-git-send-email-Julia.Lawall@lip6.fr>
Date:   Thu, 22 Dec 2016 13:04:45 +0100
From:   Julia Lawall <Julia.Lawall@...6.fr>
To:     Jean Delvare <jdelvare@...e.com>
Cc:     kernel-janitors@...r.kernel.org,
        Guenter Roeck <linux@...ck-us.net>,
        linux-hwmon@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH 16/66] hwmon: (core) use permission-specific DEVICE_ATTR variants

Use DEVICE_ATTR_RO etc. for read only attributes etc.  This simplifies the
source code, improves readbility, and reduces the chance of
inconsistencies.

The semantic patch for the RO case, in the case where the show function
already has the expected name, is as follows:
(http://coccinelle.lip6.fr/)

// <smpl>
@ro@
declarer name DEVICE_ATTR;
identifier x,x_show;
@@

DEVICE_ATTR(x, \(0444\|S_IRUGO\), x_show, NULL);

@script:ocaml@
x << ro.x;
x_show << ro.x_show;
@@

if not (x^"_show" = x_show) then Coccilib.include_match false

@@
declarer name DEVICE_ATTR_RO;
identifier ro.x,ro.x_show;
@@

- DEVICE_ATTR(x, \(0444\|S_IRUGO\), x_show, NULL);
+ DEVICE_ATTR_RO(x);
// </smpl>

Signed-off-by: Julia Lawall <Julia.Lawall@...6.fr>

---
 drivers/hwmon/hwmon.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/hwmon/hwmon.c b/drivers/hwmon/hwmon.c
index 3932f92..0c5660c 100644
--- a/drivers/hwmon/hwmon.c
+++ b/drivers/hwmon/hwmon.c
@@ -63,11 +63,11 @@ struct hwmon_thermal_data {
 };
 
 static ssize_t
-show_name(struct device *dev, struct device_attribute *attr, char *buf)
+name_show(struct device *dev, struct device_attribute *attr, char *buf)
 {
 	return sprintf(buf, "%s\n", to_hwmon_device(dev)->name);
 }
-static DEVICE_ATTR(name, S_IRUGO, show_name, NULL);
+static DEVICE_ATTR_RO(name);
 
 static struct attribute *hwmon_dev_attrs[] = {
 	&dev_attr_name.attr,