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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>
This commit is contained in:
Phil Carmody 2009-12-18 15:34:19 +02:00 committed by Greg Kroah-Hartman
parent 8e9b936226
commit 26579ab70a
3 changed files with 10 additions and 8 deletions
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8
Documentation/filesystems/sysfs.txt
View File

@ -91,8 +91,8 @@ struct device_attribute {
const char *buf, size_t count); const char *buf, size_t count);
}; };
int device_create_file(struct device *, struct device_attribute *); int device_create_file(struct device *, const struct device_attribute *);
void device_remove_file(struct device *, struct device_attribute *); void device_remove_file(struct device *, const struct device_attribute *);
It also defines this helper for defining device attributes: It also defines this helper for defining device attributes:
@ -316,8 +316,8 @@ DEVICE_ATTR(_name, _mode, _show, _store);
Creation/Removal: Creation/Removal:
int device_create_file(struct device *device, struct device_attribute * attr); int device_create_file(struct device *dev, const struct device_attribute * attr);
void device_remove_file(struct device * dev, struct device_attribute * attr); void device_remove_file(struct device *dev, const struct device_attribute * attr);
- bus drivers (include/linux/device.h) - bus drivers (include/linux/device.h)

6
drivers/base/core.c
View File

@ -446,7 +446,8 @@ struct kset *devices_kset;
* @dev: device. * @dev: device.
* @attr: device attribute descriptor. * @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; int error = 0;
if (dev) if (dev)
@ -459,7 +460,8 @@ int device_create_file(struct device *dev, struct device_attribute *attr)
* @dev: device. * @dev: device.
* @attr: device attribute descriptor. * @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) if (dev)
sysfs_remove_file(&dev->kobj, &attr->attr); sysfs_remove_file(&dev->kobj, &attr->attr);

4
include/linux/device.h
View File

@ -319,9 +319,9 @@ struct device_attribute {
struct device_attribute dev_attr_##_name = __ATTR(_name, _mode, _show, _store) struct device_attribute dev_attr_##_name = __ATTR(_name, _mode, _show, _store)
extern int __must_check device_create_file(struct device *device, 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, 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, extern int __must_check device_create_bin_file(struct device *dev,
struct bin_attribute *attr); struct bin_attribute *attr);
extern void device_remove_bin_file(struct device *dev, extern void device_remove_bin_file(struct device *dev,