instance_attribute
#define to_instance_attr(a) container_of(a,struct instance_attribute,attr)
struct instance_attribute *instance_attr = to_instance_attr(attr);
struct instance_attribute *instance_attr = to_instance_attr(attr);
static struct instance_attribute attr_instance_##_name = { \
struct instance_attribute *instance_attr = to_instance_attr(attr);
struct instance_attribute *instance_attr = to_instance_attr(attr);
static struct instance_attribute attr_instance_##_name = { \
#define to_instance_attr(a) container_of(a, struct instance_attribute, attr)