[PATCH] add MODULE_* attributes to bit reversal library

[linux-drm-fsl-dcu.git] / lib / kobject.c

diff --git a/lib/kobject.c b/lib/kobject.c
index 687ab418d292b15084d8a97be48f6003b0d0e315..7ce6dc138e90ed391618b222847a664024daf402 100644 (file)
--- a/lib/kobject.c
+++ b/lib/kobject.c
@@ -111,14 +111,14 @@ char *kobject_get_path(struct kobject *kobj, gfp_t gfp_mask)
        len = get_kobj_path_length(kobj);
        if (len == 0)
                return NULL;
-       path = kmalloc(len, gfp_mask);
+       path = kzalloc(len, gfp_mask);
        if (!path)
                return NULL;
-       memset(path, 0x00, len);
        fill_kobj_path(kobj, path, len);
 
        return path;
 }
+EXPORT_SYMBOL_GPL(kobject_get_path);
 
 /**
  *     kobject_init - initialize object.
@@ -198,14 +198,14 @@ int kobject_add(struct kobject * kobj)
 
                /* be noisy on error issues */
                if (error == -EEXIST)
-                       pr_debug("kobject_add failed for %s with -EEXIST, "
+                       printk("kobject_add failed for %s with -EEXIST, "
                               "don't try to register things with the "
                               "same name in the same directory.\n",
                               kobject_name(kobj));
                else
-                       pr_debug("kobject_add failed for %s (%d)\n",
+                       printk("kobject_add failed for %s (%d)\n",
                               kobject_name(kobj), error);
-               /* dump_stack(); */
+                dump_stack();
        }
 
        return error;
@@ -309,6 +309,56 @@ int kobject_rename(struct kobject * kobj, const char *new_name)
        return error;
 }
 
+/**
+ *     kobject_move - move object to another parent
+ *     @kobj:  object in question.
+ *     @new_parent: object's new parent
+ */
+
+int kobject_move(struct kobject *kobj, struct kobject *new_parent)
+{
+       int error;
+       struct kobject *old_parent;
+       const char *devpath = NULL;
+       char *devpath_string = NULL;
+       char *envp[2];
+
+       kobj = kobject_get(kobj);
+       if (!kobj)
+               return -EINVAL;
+       new_parent = kobject_get(new_parent);
+       if (!new_parent) {
+               error = -EINVAL;
+               goto out;
+       }
+       /* old object path */
+       devpath = kobject_get_path(kobj, GFP_KERNEL);
+       if (!devpath) {
+               error = -ENOMEM;
+               goto out;
+       }
+       devpath_string = kmalloc(strlen(devpath) + 15, GFP_KERNEL);
+       if (!devpath_string) {
+               error = -ENOMEM;
+               goto out;
+       }
+       sprintf(devpath_string, "DEVPATH_OLD=%s", devpath);
+       envp[0] = devpath_string;
+       envp[1] = NULL;
+       error = sysfs_move_dir(kobj, new_parent);
+       if (error)
+               goto out;
+       old_parent = kobj->parent;
+       kobj->parent = new_parent;
+       kobject_put(old_parent);
+       kobject_uevent_env(kobj, KOBJ_MOVE, envp);
+out:
+       kobject_put(kobj);
+       kfree(devpath_string);
+       kfree(devpath);
+       return error;
+}
+
 /**
  *     kobject_del - unlink kobject from hierarchy.
  *     @kobj:  object.
@@ -407,6 +457,7 @@ static struct kobj_type dir_ktype = {
 struct kobject *kobject_add_dir(struct kobject *parent, const char *name)
 {
        struct kobject *k;
+       int ret;
 
        if (!parent)
                return NULL;
@@ -418,7 +469,13 @@ struct kobject *kobject_add_dir(struct kobject *parent, const char *name)
        k->parent = parent;
        k->ktype = &dir_ktype;
        kobject_set_name(k, name);
-       kobject_register(k);
+       ret = kobject_register(k);
+       if (ret < 0) {
+               printk(KERN_WARNING "kobject_add_dir: "
+                       "kobject_register error: %d\n", ret);
+               kobject_del(k);
+               return NULL;
+       }
 
        return k;
 }