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-rw-r--r--Documentation/kobject.txt4
-rw-r--r--drivers/base/core.c5
-rw-r--r--include/linux/sysfs.h4
-rw-r--r--lib/kobject.c18
4 files changed, 17 insertions, 14 deletions
diff --git a/Documentation/kobject.txt b/Documentation/kobject.txt
index 51a8021ee53..f5d2aad65a6 100644
--- a/Documentation/kobject.txt
+++ b/Documentation/kobject.txt
@@ -118,6 +118,10 @@ the name of the kobject, call kobject_rename():
int kobject_rename(struct kobject *kobj, const char *new_name);
+Note kobject_rename does perform any locking or have a solid notion of
+what names are valid so the provide must provide their own sanity checking
+and serialization.
+
There is a function called kobject_set_name() but that is legacy cruft and
is being removed. If your code needs to call this function, it is
incorrect and needs to be fixed.
diff --git a/drivers/base/core.c b/drivers/base/core.c
index 9649d1c422a..8c2cc2648f5 100644
--- a/drivers/base/core.c
+++ b/drivers/base/core.c
@@ -1327,6 +1327,11 @@ EXPORT_SYMBOL_GPL(device_destroy);
* device_rename - renames a device
* @dev: the pointer to the struct device to be renamed
* @new_name: the new name of the device
+ *
+ * It is the responsibility of the caller to provide mutual
+ * exclusion between two different calls of device_rename
+ * on the same device to ensure that new_name is valid and
+ * won't conflict with other devices.
*/
int device_rename(struct device *dev, char *new_name)
{
diff --git a/include/linux/sysfs.h b/include/linux/sysfs.h
index b330e289d71..39924a96220 100644
--- a/include/linux/sysfs.h
+++ b/include/linux/sysfs.h
@@ -20,6 +20,8 @@
struct kobject;
struct module;
+extern int kobject_set_name(struct kobject *kobj, const char *name, ...)
+ __attribute__((format(printf, 2, 3)));
/* FIXME
* The *owner field is no longer used, but leave around
* until the tree gets cleaned up fully.
@@ -147,7 +149,7 @@ static inline void sysfs_remove_dir(struct kobject *kobj)
static inline int sysfs_rename_dir(struct kobject *kobj, const char *new_name)
{
- return 0;
+ return kobject_set_name(kobj, "%s", new_name);
}
static inline int sysfs_move_dir(struct kobject *kobj,
diff --git a/lib/kobject.c b/lib/kobject.c
index fbf0ae28237..ae6bb900bfb 100644
--- a/lib/kobject.c
+++ b/lib/kobject.c
@@ -387,6 +387,11 @@ EXPORT_SYMBOL_GPL(kobject_init_and_add);
* kobject_rename - change the name of an object
* @kobj: object in question.
* @new_name: object's new name
+ *
+ * It is the responsibility of the caller to provide mutual
+ * exclusion between two different calls of kobject_rename
+ * on the same kobject and to ensure that new_name is valid and
+ * won't conflict with other kobjects.
*/
int kobject_rename(struct kobject *kobj, const char *new_name)
{
@@ -401,19 +406,6 @@ int kobject_rename(struct kobject *kobj, const char *new_name)
if (!kobj->parent)
return -EINVAL;
- /* see if this name is already in use */
- if (kobj->kset) {
- struct kobject *temp_kobj;
- temp_kobj = kset_find_obj(kobj->kset, new_name);
- if (temp_kobj) {
- printk(KERN_WARNING "kobject '%s' cannot be renamed "
- "to '%s' as '%s' is already in existence.\n",
- kobject_name(kobj), new_name, new_name);
- kobject_put(temp_kobj);
- return -EINVAL;
- }
- }
-
devpath = kobject_get_path(kobj, GFP_KERNEL);
if (!devpath) {
error = -ENOMEM;