static void disk_release(struct kobject * kobj)
{
struct gendisk *disk = to_disk(kobj);
kfree(disk->random);
kfree(disk->part);
free_disk_stats(disk);
kfree(disk);
}
/*
* kobject & sysfs bindings for block devices
*/
static ssize_t disk_attr_show(struct kobject *kobj, struct attribute *attr,
char *page)
{
struct gendisk *disk = to_disk(kobj);
struct disk_attribute *disk_attr =
container_of(attr,struct disk_attribute,attr);
ssize_t ret = 0;
if (disk_attr->show)
ret = disk_attr->show(disk,page);
return ret;
}
static ssize_t disk_attr_store(struct kobject * kobj, struct attribute * attr,
const char *page, size_t count)
{
struct gendisk *disk = to_disk(kobj);
struct disk_attribute *disk_attr =
container_of(attr,struct disk_attribute,attr);
ssize_t ret = 0;
if (disk_attr->store)
ret = disk_attr->store(disk, page, count);
return ret;
}
/**
* get_gendisk - get partitioning information for a given device
* @dev: device to get partitioning information for
*
* This function gets the structure containing partitioning
* information for the given device @dev.
*/
struct gendisk *get_gendisk(dev_t dev, int *part)
{
struct kobject *kobj = kobj_lookup(bdev_map, dev, part);
return kobj ? to_disk(kobj) : NULL;
}
