From: Phil Carmody <ext-phil.2.carmody@nokia.com>
Date: Fri, 18 Dec 2009 13:34:19 +0000 (+0200)
Subject: Driver core: device_attribute parameters can often be const*
X-Git-Tag: v2.6.33-rc2~12^2~6
X-Git-Url: http://ftp.safe.ca/?p=safe%2Fjmp%2Flinux-2.6;a=commitdiff_plain;h=26579ab70aa0e0ea434e6e100279d2f67c094431

Driver core: device_attribute parameters can often be const*

Most device_attributes are const, and are begging to be
put in a ro section. However, the create and remove
file interfaces were failing to propagate the const promise
which the only functions they call offer.

Signed-off-by: Phil Carmody <ext-phil.2.carmody@nokia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---

diff --git a/Documentation/filesystems/sysfs.txt b/Documentation/filesystems/sysfs.txt
index b245d52..a4ac2b9 100644
--- a/Documentation/filesystems/sysfs.txt
+++ b/Documentation/filesystems/sysfs.txt
@@ -91,8 +91,8 @@ struct device_attribute {
 			 const char *buf, size_t count);
 };
 
-int device_create_file(struct device *, struct device_attribute *);
-void device_remove_file(struct device *, struct device_attribute *);
+int device_create_file(struct device *, const struct device_attribute *);
+void device_remove_file(struct device *, const struct device_attribute *);
 
 It also defines this helper for defining device attributes: 
 
@@ -316,8 +316,8 @@ DEVICE_ATTR(_name, _mode, _show, _store);
 
 Creation/Removal:
 
-int device_create_file(struct device *device, struct device_attribute * attr);
-void device_remove_file(struct device * dev, struct device_attribute * attr);
+int device_create_file(struct device *dev, const struct device_attribute * attr);
+void device_remove_file(struct device *dev, const struct device_attribute * attr);
 
 
 - bus drivers (include/linux/device.h)
diff --git a/drivers/base/core.c b/drivers/base/core.c
index f1290cb..2fd9e61 100644
--- a/drivers/base/core.c
+++ b/drivers/base/core.c
@@ -446,7 +446,8 @@ struct kset *devices_kset;
  * @dev: device.
  * @attr: device attribute descriptor.
  */
-int device_create_file(struct device *dev, struct device_attribute *attr)
+int device_create_file(struct device *dev,
+		       const struct device_attribute *attr)
 {
 	int error = 0;
 	if (dev)
@@ -459,7 +460,8 @@ int device_create_file(struct device *dev, struct device_attribute *attr)
  * @dev: device.
  * @attr: device attribute descriptor.
  */
-void device_remove_file(struct device *dev, struct device_attribute *attr)
+void device_remove_file(struct device *dev,
+			const struct device_attribute *attr)
 {
 	if (dev)
 		sysfs_remove_file(&dev->kobj, &attr->attr);
diff --git a/include/linux/device.h b/include/linux/device.h
index 2a73d9b..aa5b3e66 100644
--- a/include/linux/device.h
+++ b/include/linux/device.h
@@ -319,9 +319,9 @@ struct device_attribute {
 struct device_attribute dev_attr_##_name = __ATTR(_name, _mode, _show, _store)
 
 extern int __must_check device_create_file(struct device *device,
-					   struct device_attribute *entry);
+					   const struct device_attribute *entry);
 extern void device_remove_file(struct device *dev,
-			       struct device_attribute *attr);
+			       const struct device_attribute *attr);
 extern int __must_check device_create_bin_file(struct device *dev,
 					       struct bin_attribute *attr);
 extern void device_remove_bin_file(struct device *dev,